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@kommandantgalileo
3 жыл бұрын
Fun or not so fun fact the comet can be very deadly Also do a megaproject on the B-29
@mustafaemad3614
3 жыл бұрын
Please make a video about Bar Lev Line, costing around $300 million in 1973.
@flyingwolffilms
3 жыл бұрын
Do something else besides a plane man I would really appreciate that
@MrCodwaw101
3 жыл бұрын
Simon, I love your videos. Keep up the hard work, and Happy Thanksgiving to you and your family!
@vibingwithvinyl
3 жыл бұрын
You may want to correct the title, it's supposed to be "de Havilland Comet."
@carinamchugh4436
3 жыл бұрын
Dear Simon, make an Aviation channel. We will watch and love it just as much as we loved ALL The variety that used to be on this channel. ☺️
@starsoffyre
3 жыл бұрын
Agreed. Simon has too few channels!
@johnconnor2572
3 жыл бұрын
@@starsoffyre Hes clearly been slacking
@chacecrowell
3 жыл бұрын
Planeographies? Skyprojects?
@JDHJDH1
3 жыл бұрын
@@chacecrowell planeographics
@danielchong5032
3 жыл бұрын
Aerographics
@lairdbufflehead
3 жыл бұрын
My favorite plane. I used to fly on the Dan Air Comet 4C's to Mallorca from Glasgow when I was a kid. The pilots would invite kids including myself to go up and see the cockpit. On one flight the captain asked me to turn the OBS to the new heading for the autopilot in flight. Shame kids can’t experience this any more. This was what started my love for aviation and eventually becoming a pilot myself.
@JWINDSOR
3 жыл бұрын
Im pretty sure the investigation into the crash basically set the template for all air crash investigation teams that followed. Incredibly beautiful aircraft tho.
@sandervanderkammen9230
9 ай бұрын
Unfortunately the only thing learned from the Comet Disaster was that aircraft manufacturers could no longer be trusted to conduct their own crash investigations. The Comet remains the worst jet airliner in history
@Paul-Nicer58
6 ай бұрын
Chow Mein gobblers should be aware. *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% Boeing 707 USA *20%* Lockheed Electra USA *29%*
@surferdude4487
3 жыл бұрын
I got to see one of these fly once at the CNE Air Show in Toronto.
@linkizlinkizzon8427
3 жыл бұрын
Please do JAS 39 Gripen the largest project in Sweden's industrial history! Interesting and revolutionary, and paved the way for all modern fighter jets we see today
@the_hope_of_balarat1109
3 жыл бұрын
Megaproject video suggestion: the US Interstate system. Talk about a *mega* project...
@sanderschuringa1
3 жыл бұрын
German Autobahn!
@joshuaosborn
3 жыл бұрын
*Eisenhower Interstate System
@london651
3 жыл бұрын
I'm with this would love to see this Simon
@JoaoPessoa86
3 жыл бұрын
If an entire city in the middle of nowhere was only a side project I don't think the interstate would qualify anymore
@PunksloveTrumpys
3 жыл бұрын
Absolutely. If the Interstate interests you, check out the documentary 'Divided Highways' (1997), and the book it was based off.
@MTTT1234
3 жыл бұрын
The thing with the Comet was that aparently the first prototypes had a stronger hull because of the extensive pressurizing and depressurizing tests, which changed the molecular makeup of the alloy, making it more stronger. A feature that the serial models lacked, and which confused the developers of the aircraft when the hull material started to fail much earlier than expected.
@bcfairlie1
3 жыл бұрын
I always loved the styling and look of the Comet.
@BytebroUK
3 жыл бұрын
I think I'm right in saying that even after it was out of commercial service, it continued with the military as the Nimrod.
@wrightmf
3 жыл бұрын
Reminds me of another commercial airliner that had problems was the Lockheed Electra. However, it went on serving the Navy as a P3 subchaser for decades.
@thecotswoldflyer
3 жыл бұрын
Correct. In fact the engines being located in the wing roots made it very well suited to sub hunting as you didn't have engines hanging below the wings upsetting the various sensors.
@sandervanderkammen9230
9 ай бұрын
No, the Hawker Siddley HS.801 Nimrod is not a Comet, it has a completely different type certification and shares nothing in common with the early failed airliner design.
@BytebroUK
9 ай бұрын
@@sandervanderkammen9230 I learn. Thank you.
@Paul-Nicer58
6 ай бұрын
Chow Mein gobblers should be aware. Nimrod work started before 1954 at Dehavilland. The Dehavilland team, wherever they were, were responsible for all Nimrod work. The Nimrod is a Comet. *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% Boeing 707 USA *20%* Lockheed Electra USA *29%*
@fe3bal
3 жыл бұрын
I was hoping you could have an Epilogue, where the Comet was heavily modified in the 60's by Hawker Siddeley to make the Nimrod. The first two prototype Nimrods were built from two final unfinished Comet 4C airframes.
@iainsword6027
3 жыл бұрын
I love the nimrod, one of my favourite aircraft.
@tomhemming9236
3 жыл бұрын
Nice to see this comment, it was one of my Great-grandfather's projects, he became chairman of Hawker Siddeley having worked at deHavilland before the merger!
@sandervanderkammen9230
9 ай бұрын
The Hawker Siddley HS.801 Nimrod is not a Comet, it has a completely different type certification and shares nothing in common with the early failed airliner design.
@sandervanderkammen9230
9 ай бұрын
@@johnhiggins9484*Hey Johnny boy!* *Please name a single British company that still makes commercial jet aircraft in the UK?*
@stephenjenkins10
3 жыл бұрын
I flew to Italy, with Dan-Air, on a Comet4b for a ski holiday back in the late 1970’s. It was supposed to be a direct flight from Belfast, but we actually landed in at London (Gatwick I think) to change planes, to another Comet4b. I believe that these were the last Comet4b’s in commercial service, and on the return flight I took one of the ‘No Smoking’ stickers off the overhead luggage bins. This was stuck on my bedroom door for years, until I moved out and went to University; kind of a souvenir of the last of the Comets.
@jonjohnson2844
3 жыл бұрын
I've watched a number of documentaries about the Comet over the years and this is probably the most detailed analysis I've heard, actually learnt a lot of things I hadn't heard before - I'm surprised you never mentioned the change from rectangular to oval windows though, this has always been the central flaw/solution in everything else I've read or seen.
@markleyg
3 жыл бұрын
Always loved the look of the encased engines.
@kdarkwynde
3 жыл бұрын
Looks cool as hell. Makes maintenance a real bear, though.
@sandervanderkammen9230
9 ай бұрын
A major fatal design flaw... which is why no other manufacturers use this design
@Paul-Nicer58
6 ай бұрын
Chow Mein gobblers should be aware. *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% Boeing 707 USA *20%* Lockheed Electra USA *29%*
@joshuahudson5336
3 жыл бұрын
Here is a megaproject. The USS Monitor. She may not have been huge, but the impact on naval warfare was massive. She ended wooden sailing warships and warships with rows of guns, had more than 40 patentable components, and the world's first rotating turret ever to be used in battle. She is the true ancestor to all modern warships.
@garfieldsmith332
3 жыл бұрын
The main outcome from The Battle oh Ha[ton Roads was that is a few short hours all the world's navies became obsolete. And had the Monitor fired full shot rounds the C.S.S. Virginia would have probably been sent to the bottom.
@joshuahudson5336
3 жыл бұрын
@@garfieldsmith332 That and the fact that the Monitor had so many technological advances that were quickly adopted. Below water marine heads, mechanical ventilation, mechanically rotating turret, just to name a few.
@garfieldsmith332
3 жыл бұрын
@@joshuahudson5336 Yep. And it gave is name to a whole class of ships. A lot of designs were called "Monitors" after that. "Tough little ship".
@bimblinghill
3 жыл бұрын
If the old adage "if it looks right, it flies right" had truly held it would've been a triumph, because it's a damn sexy looking aircraft. Those engines in the wing roots, the shape of the nose.. just gorgeous.
@wrightmf
3 жыл бұрын
Yes they do give a sleek look, however, that prevents the Comet from being able to accept high bypass engines unlike the underwing engine design of the 707. But I think it was really big news when this thing first flew twice as fast and much higher than the prop jobs. Probably the next time that happened was the Concorde.
@bimblinghill
3 жыл бұрын
@@wrightmf Yes it's always a risk to integrate things. Elegance isn't always the most important virtue. Accommodating ever wider engines remains a problem to this day; it was the start of the chain of events that got the 737-max into trouble.
@missinglincoln
3 жыл бұрын
You could have mentioned that the shape of the windows - both passenger and antenna - played a significant role in the stress fractures that led to the mid-air disintegration events. Square windows were the way aeroplane windows had always been...but those were slower, unpressurized craft. Square corners are stress concentrators, and when the fuselage bent and twisted and expanded and contracted, fissures formed in the corners. I believe the results of the wreckage re-build revealed it was the small square window in the top of the fuselage where the antenna (surrounded by an insulating plastic insert) was located was where the failure began in that case. You are very correct when you say that this investigation ultimately saved the lives of countless passengers and crews. Because this was going to happen to *some* aeroplane...and sadly the Comet was first out of the starting gate. Way too many people did die...but at least some good came from their loss, in the end. Beautiful aeroplane. Then, now, always.
@bob2161
3 жыл бұрын
Hello Simon, another fine Megaprojects episode. As always, I learned something new. You did, however, leave a point, unanswered. You mentioned the two failed takeoffs that were initially ruled as pilot error. You indicated that that ruling was itself, in error. However, you never stated what the actual cause of those accidents were. I'm pretty confident that a pressurization problem would not have been a contributing issue to a failed takeoff. Don't leave us hanging like that. How about a follow up?
@sandervanderkammen9230
9 ай бұрын
Excellent comments, the answer is the design of the engines in the wing were ultimately responsible for several major runway excursions. Based on a British aerodynamic theory that later proved completely wrong, wind tunnel tests did not account for angle of attack at take-off. The flawed placement of the engine inlets in the wings leading edge caused a disruption of air flow into the engines causing loss of thrust, AND disrupted flow over the wing causing loss of lift at the critical rotation angle. Comet 4 required extensive modifications to the wings and inlets and take-off performance was reduced to mitigate the effects that could not be fixed. No other manufacturers have ever used this design.
@bob2161
9 ай бұрын
@@sandervanderkammen9230 Wow! Thank you. After all this time (2 years) someone has an answer. And your answer completely makes sense to me. Even though the inlet arrangement isn't the issue, modern twin jet airliners have a takeoff procedure in place to avoid the same problem. As the takeoff roll begins, the pilot pushes the throttles to only a partial setting. Then a short time later the throttles are push up all the way to takeoff power. The reason is that at the initial slow speed, if one engines output failed, while the other spun up to full thrust, the pilots would not be able to keep the plane on the runway. Only after they've confirmed that both engines output have reached a certain level (usually 40%) do they apply full power. There are instruments that display this information to the pilots. I do not know if the procedure is 40% for all twin jets, but it will be similar. Thanks again for the answer.
@sandervanderkammen9230
9 ай бұрын
@@bob2161 Not exactly, it is an aerodynamic issue, not related to the engines themselves. If you look carefully at the engine inlets on the Comet 1 and compare them to the Comet 4 you will see some significant re-engineering, the 4 has much larger inlets which are angled downwards below leading edge line. They help reduce the problem but do not solve it completely, the new inlets are less efficent and create more drag.
@sandervanderkammen9230
9 ай бұрын
@@bob2161 The Comet 4 was also redesigned with improve wings, flaps and hydraulic flight controls to reduce the angle of attack at rotation and prevent pilots from accidententally over-rotating if the plane doesn't lift-off at the proper V-speed. The Comet 4 requires a longer temperature/altitude/GTOW distatance and the new engines provide more thrust to weight ratio performance at TO.
@bob2161
9 ай бұрын
@@sandervanderkammen9230 i understood that it wasn't the engines themselves. It was due to the shape of the original inlets. When the angle of attack was wrong, the inlet would restrict the airflow to the engine. This would cause an interruption of power from the engine. If/when this happens on one side of the plane, but not the other, an asymmetrical thrust condition is created. At low airspeeds and/or high angles of attack, there wouldn't be enough control authority to keep the plane from yawing towards the compromised engine. This would indeed cause an "Uncommanded excursion from the desired flight profile". It isn't the same problem I described with the modern twin jets, but it produces the same symptoms, and ultimate outcome.
@anarchyantz1564
3 жыл бұрын
Megaproject Suggestion. Longest deep bore ice core in Antarctica. Took years, loads of drama with it and they found some cool stuff like a fresh water lake under the ice containing previously unknown lifeforms. Would go Well with the other hole projects that are popular Speaking of deep holes, how about the Kidd Mine as well?
@Gazmus
3 жыл бұрын
This sounded like a cool thing...so I searched to see if anyone had done it. Turns out this channel did it 4 days ago :D I wonder if he saw this comment.
@anarchyantz1564
3 жыл бұрын
@@Gazmus Well I did spam this comment ever single episode, so 3 times a week for about 4 months so quite likely. He has a team of writers go through the comments and given how many topics and the filming time it usually takes about that long from your suggestion I guess, plus depends on how many thumbs up you get.
@LRBerry
3 жыл бұрын
I flew on a Dan-Air Comet from Manchester to Malaga. One of my favourite aircraft. During my time in the Air Training Corps, I and a couple of friends had a guided tour of an RAF Nimrod, outside and inside, which was an amazing experience.
@Christian-nl7cm
3 жыл бұрын
the integrated engines into the wings still looks more futuristic than anything now
@sandervanderkammen9230
2 жыл бұрын
Tragic engineering blunder, the engine placement was a fatal flaw.
@petemaly8950
Ай бұрын
@@sandervanderkammen9230 @sandervanderkammen9230 Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* The engine positioning had some advantages & were of course not a flaw of any type. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* . .... . ... . ... .. ... ... . ... .... Ivcxivcxivcxcx iivxvivcxiccxxcc
@android584
12 күн бұрын
Maybe an ease of maintenance flaw.
@mochaholic3039
3 жыл бұрын
Another thing that played against the Comet: the engines, they were deeply buried within the wing-roots. Those were a pain in the butt to work on, especially when engine removal was necessary to do maintenance. That's one of the reasons Boeings and etc with underwing mounted engines won the market, those easily accessible engines made mechanics' lives much more easier and enabled much speedier turnaround times.
@sandervanderkammen9230
3 жыл бұрын
At least 3 crashed due to the placement of the engines, the Comet 4 required major corrections to fix this fatal flaw in the Comets original design.
@petemaly8950
Ай бұрын
@@sandervanderkammen9230 Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. The engine position was not a flaw & caused no crashes. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* . .... . ... ... .. ... .... ... ..... . Ivcxivcxivcx xcxiivxccxvccv vivcxmcvxxcc
@paulybassman7311
3 жыл бұрын
Simon and Oliver ! You both failed to mention the RAF Nimrod!!!? ALEGENDLY!!
@roriquevernonii8439
3 жыл бұрын
I started this video expecting a mention, and totally forgot until I saw this.
@Markle2k
3 жыл бұрын
The Nimrod is not related.
@roriquevernonii8439
3 жыл бұрын
@@Markle2k I thought the Nimrod was based on the Comet. Where does the Nimrod come from?
@tristan4777
3 жыл бұрын
The Nimrod was developed from the de Havilland Comet by Hawker Siddeley. The modification of the de Havilland Comet design was extensive. So while they are related, perhaps not closely enough for a mention and possibly not relevant to the history of cvilian aviation.
@roriquevernonii8439
3 жыл бұрын
I guess it means more to "geeks" who already know, not necessarily his full audience.
How about a video on the Williams Fw14b. Built in 1992 and still regarded as one of the most technologically advanced cars ever built. Great work Simon keep up the great content
@prmeth3utempet339
3 жыл бұрын
Megaproject suggestion: SS Normandie one of the largest transatlantic liner built as well as the largest turbo electric powered ship ever built and a former blue riband holder
@alistairjohnson8185
3 жыл бұрын
I flew on a Comet 4 in 1970. It was a beautiful, steady plane and a joy to fly in.
@chadvough8359
3 жыл бұрын
We studied the the Comet in my aircraft systems class. I noticed the photo of the aircraft when Simon mentioned testing, you see the aircraft with a giant structure built around the fuselage.. This photo is actually a photo of testing done after the crashes. They had built a giant water tank then submerge the aircraft over and over to simulate the pressure differential of high altitude flying in cycles. This is how they found the metal fatigue issues with punch riveting, and square windows. An airplane fuselage is a sealed metal tube, When the pressure outside is reduced (When you gain altitude) and inside pressure remains the same the fuselage expands, Then the reverse happens when you descend. Some metals can work harden making them brittle. We learned a lot from the mistakes, making the Comet one of the most important aircraft in aviation history.
@sandervanderkammen9230
3 жыл бұрын
Boeing, Douglas, Junkers and Lockheed were all manufacturing pressurized passenger airliners prior to the Comet Disaster... What we learned was that DeHaviland was a poorly managed company that was decades behind in aircraft design and construction technology.
@sandervanderkammen9230
3 жыл бұрын
The Comet Disaster is the worst engineering failure in aviation history...its and example of what happens when a company tries to save weight and cost at the expense of safety... it's called criminal negligence today.
@Paul-Nicer58
6 ай бұрын
Chow Mein gobblers should be aware. *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% Boeing 707 USA *20%* Lockheed Electra USA *29%*
@petemaly8950
Ай бұрын
@@sandervanderkammen9230 @sandervanderkammen9230 @sandervanderkammen9230 Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* . ... . .... . ... ... . ... .. ... .... ... ..... . Ivcxivcxivcxcvc xcxiivxccxvcvccv vivcxiccvccvxxcc
@JeffDeWitt
3 жыл бұрын
In something like 1966 I went on my first plane trip by myself. My parents put me on a plane in Chicago and my grandparents picked me up at Newark. On the way I rode in a 707 (I know because it said "Boeing 707" on the window frame), on the way back I rode in a Comet. It was so long ago that my meal including a free small pack of Winston cigarettes'... they gave cigarettes to a 10 year old kid on an airplane!
@MrPizzaman09
3 жыл бұрын
Are you an engineer in the 40's/50's and designed something this big + made it? Yes, anything like this is a seriously large project.
@jocelynhurtubise2420
3 жыл бұрын
Very good as always, may I suggested a video on the Canadian Jetliner CF-102 (Made by the same people who built the CF-105) it flew around the same time as the comet.
@TTTzzzz
3 жыл бұрын
I propose a documentary about one of the largest man made systems of the world. The total Dutch water management system. From the smallest ditches to the Delta Works. Through out the country water levels are controlled within 1 cm. Weirs adjust their height sometimes every 10 minutes. The length of Dutch waterways are: Large rivers: 650 km Canals: 6.500 km Small rivers and brooks: 6.200 km Ditches (mostly not monitored): 330.000 km Total: 343.350 km! That is nearly 11 times the circumference of the earth. Monitored waterways are13.350 km in length. That is 0.33 times the circumference of the earth. The Delta Works are the most visible aspects of Dutch water management. But what happens inland is no less impressive. I enjoy your work, Regards, Peter Tholen.
@mikesullivanteexpat8712
3 жыл бұрын
Had heard of the DeHaviland Comet but never new the detail, interesting look into its beginnings and eventual demise.
@ebola1974
3 жыл бұрын
Fun fact: Saving Private Ryan and Band of Brothers were filmed at the old De Havilland aerodrome in Hatfield, England
@MrDragon1968
3 жыл бұрын
Indeed. I was on the set for a couple of days. It was fun walking around the 'towns' they'd constructed.
@spir0sgi
3 жыл бұрын
I found your channel about a month ago. I really enjoy your videos and your way of narrating them. Brief yet thorough with a nice personal twist! Keep it up mate!
@ninchan2
3 жыл бұрын
speaking of aircrafts taking off from Heathrow... how about a video ON Heathrow? not sure if it qualifies for a mega- or sideproject (geographics?) but the story of the airport from its small beginnings to what it is today is quite interesting and the whole 3rd runway debacle could take up a video on its own.
@s2meister
3 жыл бұрын
Hummm no mention of the Hawker Siddeley Nimrod?
@Rammstein0963.
3 жыл бұрын
Beautiful airplane, sad that it took several fatal accidents to figure out the windows were the problem. You'd have thought they'd have figured that out sooner given that WWII aircraft with pressurized airframes like the B-29 already were using rounded windows YEARS earlier.
@GimbleOnDew
3 жыл бұрын
Material properties weren't nearly as well understood as they are today.
@bimblinghill
3 жыл бұрын
Kind of. They understood the raw strength benefits of a round window, but ease of manufacturing favoured a square for the Comet. What they didn't appreciate was how much the strength falls off with fatigue.
@PenzancePete
3 жыл бұрын
The B-29 wasn't a completely pressurised aircraft. By the same token some P.R. Spitfires and Mosquitos were pressurised. Pressurising a complete airframe for 40,000' is a whole different ball game.
@petemaly8950
Ай бұрын
DH were doing all metal airframe construction aircraft & pressurised cabin aircraft & building jet engines for many years before the Comet. They also knew all there was to know about metal fatigue at the time & carried out an extensive & protracted programme of testing & proving before the first Comet prototype flew. They were also fully up to speed in all matters related to pressure vessels & any stress concentrations due to cutouts such as windows doors & hatches. Nobody had done an airliner with an 8 psi pressurised full fuselage length passenger cabin before the Comet.
@eileenobyrne-hudson8636
3 жыл бұрын
No materials science textbook is complete without a mention of the Comet in the fracture mechanics section. But as stated, it was a good lesson for the rest of the industry. A lot of engineering is about looking at what others have already done, and understanding why they chose the path they did. No sense is repeating others' mistakes. Or wasting time doing work that's already been done.
@arnepianocanada
3 жыл бұрын
Megaproject: figuring out the principle of flight in the first decade or so after the 1903 Wright Brothers' pioneering work. Some of the odd-shaped, monstrous or otherwise ungainly craft look incredible now - but each stepped us along the path to 747s and Space Shuttles.
@Iamchrome327
3 жыл бұрын
Fun fact: The first passenger jet was nearly the Avro Canada C102 Jetliner, with the Comet beating the Jetliner by 13 days.
@garfieldsmith332
3 жыл бұрын
Yep. There was a rush by DH to get into the air first. I believe the CF-102 was a superior aircraft. A tad slower but all round better and safer.
@martinda7446
3 жыл бұрын
@@garfieldsmith332 It was simply NOT even close to the sophistication of the Comet. There simply isn't one part in all the thousands of pieces that approached the genius of the Comet engineering. The Comet was the archetype commercial jetliner and still looks the part 70 years later. The 102 looks like a DC4 with an engine upgrade.
@caligulapontifex5759
3 жыл бұрын
@@martinda7446 🤔, yeah about that engineering. The poor souls on those three Comets lost within 12 months would disagree with that assessment.
@johnpinckney4979
3 жыл бұрын
Don't forget the Nene Viking with two R-R Nene engines and Tay Viscount with R-R Tay jets...
@garfieldsmith332
3 жыл бұрын
@@martinda7446 I do not think the Comet looks that great. Similar engine configuration to the C-102. I would rather fly in a DC-4 with and engine upgrade back then.
@tenaciousrodent6251
3 жыл бұрын
Still hoping for Turbinia: The first geekgasm in history.
@jdreyes3745
3 жыл бұрын
The ship which humiliated the Royal Navy gunboats trying to chase it, being the first steam turbine-powered seagoing vessel.
@thedevilinthecircuit1414
3 жыл бұрын
Lindybeige has a really good documentary on that: kzitem.info/news/bejne/16iQm317ZmN4fWk
@pauld6967
3 жыл бұрын
With my years of interest in aviation and history I had long been aware of the situation with the Comet but thank you for introducing this to a new set of people that may be learning about this for the first time.
@q300SBB
3 жыл бұрын
Very good MP team. I’m most impressed that you went into the route cause, i.e. the punch method to rivet the skin. Many productions stop at the square windows being the culprit.
@sandervanderkammen9230
3 жыл бұрын
Good comment. Insufficient skin thickness, lack of doubler joints and bad riveting was the ultimate cause of the catastrophic structure failures.
@Multicsfan
3 жыл бұрын
It wasn't bad riveting but with how the rivet holes were made. The holes were punched by the rivet. If they had drilled the holes or used another method it would have worked. Another video indicated they tested the airframe but did one test first which covered up the second problem. If they had used separate airframes in testing the problem would have shown up.
@sandervanderkammen9230
9 ай бұрын
@@MulticsfanThe workmanship and techniques were both found to be well below standards of the day, inspection was also inadequate.
@petemaly8950
Ай бұрын
@@sandervanderkammen9230 @sandervanderkammen9230 @sandervanderkammen9230 Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* . .... . ... ... . ... .. ... .... ... ..... . Ivcxivcxivvcvvcx xcxiivxccxvccv vivcxiccvc cvxxcc
@Fish-kz8xw
3 жыл бұрын
Megaproject suggestion: Fort Drum aka the concrete battleship.
@TailSpinRCSpain
3 жыл бұрын
They used to fly over our school when they were converting them to Nimrods c1971.
@sandervanderkammen9230
3 жыл бұрын
The Nimrods were new aircraft manufactured by Hawker-Siddeley.
@TailSpinRCSpain
3 жыл бұрын
@@sandervanderkammen9230 I never knew that, cheers. They also flew the Vulcan, Victor and Shackleton right over the playground on approach to Woodford Aerodrome. We saw many prototype variants of Nimrod with different R.A.D.A.R domes.
@RJM1011
3 жыл бұрын
@@sandervanderkammen9230 The main body was from the Comet ! I worked at FRA and when the aircraft were striped down you could see where there had changed the windows from the square ones !
@sandervanderkammen9230
3 жыл бұрын
@@RJM1011 Not true, only the prototype of the Nimrod was built from a unsold Comet 4C. The Comet 4C was a completely redesigned aircraft and none were ever built with square windows. It seems you have your facts confused here.
@petemaly8950
Ай бұрын
@@sandervanderkammen9230 Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* The Comet was designed with military use in mind, prototype Nimrod work started at Dehavilland in 1953. Nearly all changes from the Comet 1 to Comet 4 were simply previously scheduled improvements that had nothing to do with any claimed relevant incidents. The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* . .... . ... ... . ... .. ... .... ... ..... . Ivcxivcxivcx xcxiivxccxvccv vivcxiccvccvxxcc
@kl0wnkiller912
3 жыл бұрын
I read a report years ago that stated that the square windows were not strong enough and they cracked at the corners, causing catastrophic failure. That is why the newer Comets have round windows. One of my earliest memories is of my family taking a flight somewhere and getting on the plane. It was a Boeing 707 and my dad, being a pilot, asked to see the cockpit. We got escorted to the cockpit and the pilot even asked if I wanted to "fly it". I was all of 5 or 6 years old so pretty sure I would have just sat on his lap or something but I declined. The stewardess took us back to our seats and later gave me a little set of gold wing with PAA (Pan America Airlines) on it. Wish I had those today! Times sure have changed.
@BillHalliwell
3 жыл бұрын
G'day Simon, In this excellent, balanced video you hit the nail right on the head towards the end. Much blame has been put on the Comet Mk1's rectangular windows as being the cause of the crashes. While they were an indicator and were, in a large part, to blame; the other faults included the fuselage skin that was far too thin and made of alloys that were prone to fatigue; the wing struts were, similarly, not as strong as they needed to be and the overall riveting method was found to be detrimental to the structural integrity of the skin in the fuselage and control surfaces. I've always been an aircraft geek and just before I joined the Air Force, many years ago, I was lucky enough to fly on two aircraft that were high on my must-fly list; they were the HS-748 and the Comet. I snagged an, all too brief, flight on a Comet 4 with Dan-Air, an airline with a spotted history of flight safety. I found the Dan-Air Comet 4 to be a little more cramped than I expected, however, it was a comfortable, stable and quiet aircraft if one was above or forward of the wings. It is a memory I'll never forget but one always tinged with sadness. I had already flown on a 707 by then and I had to admit I saw the, obvious, advantages of that aircraft. My 'jolly' on the HS-748 was a good flight but noisy. I could have saved my money, however, as I soon discovered that 748s were flown by the Air Force so, I flew on them, a few times and got paid for it! Imagine if the Comet had never been. Would the Boeing 707 have had the disasters that befell the Comet? Given that 'what if'; no 707, possibly no 747. Apart from making history as the world's first passenger jetliner; it's tragic crashes also, as many believe, made jet passenger airliners much safer the world over. It's rare indeed to find an instance of a quantum leap in aviation technology without some casualties or tragedies. No one talks of the Douglas, Boeing or Lockheed safety incidents much these days, even though some of them involved a large loss of life. Thanks again for a great video. Cheers, BH
@sandervanderkammen9230
3 жыл бұрын
Boeing, Douglas, Lockheed and Junkers were decades ahead of DeHaviland in pressurized cabins and riveted aluminum airframes... You realize that DeHaviland was still building WOOD biplanes like the Dragon Rapide in the late 1940s... Even the Vampire and Venom were still made of *WOOD!!!!*
@BillHalliwell
3 жыл бұрын
@@sandervanderkammen9230 G'day Sander, I think there is a slight misunderstanding on your part. I did not denigrate Boeing, Lockheed or Douglas nor was that my intention. The Mk 1 DH Comet being the first of its type and conceived during WW2 was ground-breaking technology 'almost' a decade ahead of its time. Supermarine experimented with flush riveting during the height of the Schneider Trophy's popularity, pre-WW2. Howard Hughes did similar 'flush jobs' on 2 of his racing planes, yes, pre-WW2. The Mk 1 Comet's main flaw was using, basically, conventional metal skin technology in an aircraft never before put under the stresses of continual cycles and their concomitant vibration issues brought about by the jet technology of the time. It's demonstrable and a fact that many British aeronautical and other technical innovations were passed on to the US (gratis) because Churchill, even before he was PM and at the Admiralty, was willing to go to any lengths to draw the US into WW2. This process began before the war, like British proximity fuse technology. There's no room here to go into the long list, however, when it came to British jet technology the Brits keenly handed over all they had on Sir Frank Whittle's jet engine inventions. The US military then 'gladly' invited British scientists and technologists to the US. By the time various British teams arrived in the US to work on different projects; the same military leaders made certain that laws were passed that forbade them from sharing any of 'their' military technology, even with Allies. The Brits were told, quite clearly to go home. This happened again when a certain team of British scientists, instrumental in new atomic fission theories were also told to go home even though they had been officially invited. True, some Brits did work on the Manhattan project but only at the insistence of Prof. Oppenheimer. Back to jets. It is also demonstrable that the early US attempts of replicating the successes of the British Gloster Meteor or the ME-262 were pitiful; their prototypes were slow, had low ceilings, poor ranges and handling. The notorious US Operation Paperclip didn't exclusively poach German rocket scientists but also jet propulsion experts, among other disciplines. Finally, with respect, you seem fixated on aircraft composed wholly or partially with "WOOD!!!!" [sic]. Did the DH Mosquito, perhaps the most valuable, versatile and fastest prop. wooden, aircraft to see service in WW2 escape your memory? The ME-262, by the way, had one major flaw: Adolf Hitler. He stupidly insisted it be made into a bomber. I'm an Australian 'republican' so I'm in no way defending the Brits. I am, also, a military historian and ex-air force member, primarily concerned with corroborated facts. (I have copies of official documents that back up over 80 percent of statements here. There would be more if I had time to spend on this reply.) American aviation has achieved magnificent technological advances. So, I have no axe to grind there either. My apologies if anything I said in my post confused you. Cheers, BH P.S. I forgot to mention that during WW2 the British developed some truly terrible aircraft that did little more than slaughter keen, young RAF and Allied aircrews that deserved much better protection and quality control in their brave defence of Britain and democracy. My good mate and author, Michael Veitch has written three excellent books of interviews with British, Australian and New Zealand survivors of the air war over Europe. Those unlucky enough not to fly Hurricanes, Spitfires, Mosquitoes or Lancasters yet survived somehow, attest to the shocking designs and qualities of a large proportion of aircraft available to RAF and Allied Air Force aircrews. BH
@tenzaemtade6146
Жыл бұрын
@@BillHalliwell his silence is deafening
@mattjames9941
3 жыл бұрын
Should’ve mentioned that the Comet went on to become the Nimrod maritime patrol jet following extensive modifications by Hawker Siddeley. It was a superb aircraft.
@sandervanderkammen9230
9 ай бұрын
The Hawker Siddley HS.801 Nimrod is not a Comet, it has a completely different type certification and shares nothing in common with the early failed airliner design.
@D0P1C3
3 жыл бұрын
ThrustSSC first land vehicle to officially break the sound barrier
@profpocket
3 жыл бұрын
As previous comments have said, Turbinia, (Can't believe how he hasn't done one on that yet) Arecibo Observatory, and the United States Interstate Highway system would be pretty interesting content to talk about.
@delurkor
3 жыл бұрын
I flew on a Comet in 1959 (age 14) from Le Havre to Heathrow(?). I remembered news report from the early '50s and was somewhat nervous. We made it with no incident. We returned later via train and ferry. I was disappointed; our passenger car did not have individual doors in the compartments like all movies with English trains.
@sandervanderkammen9230
3 жыл бұрын
You flew on the completely new, redesigned Comet 4. All the Comet 1 aircraft had their airworthiness certification permanently revoked, they never carried commercial passenger in regular service after 1954 and were eventually all scrapped or used in testing.
@petemaly8950
Ай бұрын
@@sandervanderkammen9230 Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* . .... .. .. ... .... ... ..... . Ivcxivcxivcx xcxiivxvccv vivcxiccxxcc
@rickhobson3211
3 жыл бұрын
"Fallen through the cracks of history." Yeah... and out of the sky, too. :P
@PenzancePete
3 жыл бұрын
Boeing 737 Max anyone?
@sandervanderkammen9230
3 жыл бұрын
@@PenzancePete The Max is back... The Comet 1 had its airworthiness certification was permanently revoked.
@matthewq4b
3 жыл бұрын
@@sandervanderkammen9230 It was not permanently revoked it was suspended till the 1 airframes were upgraded to Comet 2 sepcs.
@sandervanderkammen9230
3 жыл бұрын
@@matthewq4b Sorry, but that is incorrect. The Comet 1s airworthiness certification was in fact permanently revoked. No Comet 1s ever returned to commercial passenger service.
@sandervanderkammen9230
3 жыл бұрын
@@matthewq4b Comet 2s only saw service with the RAF or for testing under a restricted temporary airworthiness status with a very restricted number of airframe service hours before they too were forced to be scrapped due to metal fatigue.
@sanderschuringa1
3 жыл бұрын
Haha! “Build an airliner yourself and tell me it’s not!” [a MegaProject] KING COMMENT!
@sanderschuringa1
3 жыл бұрын
Comment / Comet 😝
@katokhaelan4881
3 жыл бұрын
Haha yeah that was awesome lol
@ethannilsson9638
3 жыл бұрын
Simon, my friend. The Sanitary Movement of the 1850's. Likely the biggest public works project ever. Think of London. Imagine retrofitting the entire city with modern sewers.
@logangaudet540
3 жыл бұрын
Hey Simon, have you ever looked into the confederation bridge in Atlantic Canada? It’s. 12.9 km bridge connecting 2 provinces to each other, constructed in the 90s.
@darrelvincent970
3 жыл бұрын
The Arecibo observatory
@darrelvincent970
3 жыл бұрын
Come on Simon you have to do it Sean Bean died there
@cynthiasimpson931
3 жыл бұрын
And I'll shut up about it!
@stringtheorysucks
3 жыл бұрын
Sadly Arecibo will be demolished soon.
@Cunoslav
3 жыл бұрын
Soooo... The first engines were Ghosts 'n Goblins...
@killernat1234
3 жыл бұрын
This plane is the same sort of thing as the first iPhone, it wasn’t perfect or flawless but it shaped the industry
@sandervanderkammen9230
3 жыл бұрын
The Boeing 707 was the plane that revolutionized aircraft travel... the Comet Disaster remains a shameful chapter in aviation history.
@petemaly8950
Ай бұрын
@sandervanderkammen9230 Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* Bow-wing (see b-47 wing folding incidents) is the result of global economics & a large & well protected domestic airliner market. The 707 happened to be much larger & thus required a thicker stressed skin for flying stress loads. The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* . .... . ... ... . ... .. ... .... ... ..... . Ivcxivcxivcx xcxiivxccxvccv vivcxiccvccvxxcc.
@PunksloveTrumpys
3 жыл бұрын
Yes, the de Havilland Comet should absolutely be remembered for revolutionising air travel... And also because it's the most absolutely fucking gorgeous creation of Man this side of Concorde.
@sandervanderkammen9230
3 жыл бұрын
It should be remembered for being the worst engineering failure in commercial aviation history... The Boeing 707 is the successful design that revolutionize air travel as we know it today.
@PunksloveTrumpys
3 жыл бұрын
@@sandervanderkammen9230 No love for the Lockheed Electra teaching the industry about aerodynamic flutter?
@sandervanderkammen9230
3 жыл бұрын
@@PunksloveTrumpys Lockheed... teaching the world that only they can fly Mach 3.5 at 100,000 feet.
@thedungeondelver
3 жыл бұрын
The Comet fell through the cracks? I'd say the cracks fell through the Comet.
@johnbockelie3899
3 жыл бұрын
At a high altitude the front end of this plane would fall apart. Also the plane had square passenger windows.
@sandervanderkammen9230
3 жыл бұрын
@@johnbockelie3899 the shape of the windows is not why they exploded... just the source of some of the initial cracks.
@petemaly8950
Ай бұрын
@@sandervanderkammen9230 Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awe & extreme wonder. *UPDATE MORE BREAKING NEWS ETC* The Comet was designed with military use in mind, Nimrod work started at De Havilland in 1953. The committee did not find hundreds of fatal flaws or evidence of design defects, structural defects, defective materials or shoddy workmanship. Ripstop provision was included. Claimed incidents did not involve cracks starting from window corners. The engine & engine intake position had advantages, were not flaws or fatal flaws & were not the cause of any incidents involving any Comet or Nimrod aircraft. Nearly all changes before the Comet 4 were just in case or were previously scheduled improvements. Bow-wing & the 707 story (see b-47 wing folding incidents) is the result of global economics & the well protected & very large domestic US airliner market & active support from the UK with for instance proposed Competing airliners from Vickers & DH being blocked. The 707 was of course a much larger aircraft which as a stressed skin metal airframe aircraft would require a thicker skin anyway. They got lucky at the time essentially. Bow-wing is the result of the large & well protected US domestic airliner market The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* This line left not blank intentionally. . .... . ... .. . . ... .. ... .... .... ............ ..... . Ivcxivcxiv cxcxcvccbccc xcxiivxccxv ccvvcvvvvvv vivcxiccvccvxxccvvv.
@ybing
3 жыл бұрын
every plane crash make flying safer, sadly it does has a great expenses to paid
@patrickbrookings
3 жыл бұрын
My dad always used to tell me about this plane. One important thing you forgot to mention is that the windows were square shaped, which was one of the main reasons of the failures. It means that the stresses converge on the corners, which caused cracks around them, and eventually failure. That's why plane windows are now oval shaped, as it evens out the stress over the whole line.
@sandervanderkammen9230
3 жыл бұрын
Not true, although some cracks originated from the corners of the navigation port and passenger windows. It was the bad fuselage skins, lack of rip-stop doubler joints and shoddy workmanship in the riveting that actually caused the catastrophic structure failures...
@Chris_at_Home
3 жыл бұрын
It is quite a coincidence that both the Comet and Lockheed Electra started as troubled passenger aircraft that had crashes but they really came of age in Military ASW as the Nimrod and Orion.
@sandervanderkammen9230
9 ай бұрын
Lockheed and de Havilland could not be more different, Lockheed is hugely successful and supplies the RAFs most advanced jet fighter... while d-H was destroyed by the _Comet Disaster_ and no longer exists.
@Chris_at_Home
9 ай бұрын
@@sandervanderkammen9230 it’s like no one wanted to buy the Nimrod where even though the Electra had early problems it flew on for years. I flew in one a few times going to Dutch Harbor in the 1990s. Lockheed was already building other military aircraft like the C-130. Then but the 60s they had the C-141. I flew in a 141 once from Maine to the Azores. I flew quite a bit in P-3 as an avionics tech. I even went to a Nimrod base in SW England in 1974.
@petemaly8950
Ай бұрын
@@sandervanderkammen9230 Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awe & extreme wonder. *UPDATE MORE BREAKING NEWS ETC* The Comet was designed with military use in mind, Nimrod work started at De Havilland in 1953. The committee did not find hundreds of fatal flaws or evidence of design defects, structural defects, defective materials or shoddy workmanship. Ripstop provision was included. Claimed incidents did not involve cracks starting from window corners. The engine & engine intake position had advantages, were not flaws or fatal flaws & were not the cause of any incidents involving any Comet or Nimrod aircraft. Nearly all changes before the Comet 4 were just in case or were previously scheduled improvements. Bow-wing & the 707 story (see b-47 wing folding incidents) is the result of global economics & the well protected & very large domestic US airliner market & active support from the UK with for instance proposed Competing airliners from Vickers & DH being blocked. The 707 was of course a much larger aircraft which as a stressed skin metal airframe aircraft would require a thicker skin anyway. They got lucky at the time essentially. Bow-wing is the result of the large & well protected US domestic airliner market The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* This line left not blank intentionally. . .... . ... .. . . ... .. ... .... .... ............ ..... . Ivcxivcxivxcv cxcxcvccbxcvcvx xcxiivxccxvcv ccvvcvvvxcx vivcxiccvccvxxccvvv.
@omegalightning5715
3 жыл бұрын
Does one of the space shuttles qualify as a megaproject?
@alexius23
3 жыл бұрын
There was a James Stewart film called “No Highway in the Sky” that dealt with a similar story
@simonbeaird7436
3 жыл бұрын
IIRC the film is called 'No Highway in the Sky'. It's based on a novel by Nevil Shute, who was an aeronautical engineer as well as an author.
@alexius23
3 жыл бұрын
@@simonbeaird7436 d’oh.....my bad
@AnotherPointOfView944
3 жыл бұрын
One of my favourite films
@nicolek4076
3 жыл бұрын
You can always thank De Havilland for having done the work and for warning Boeing and Douglas about the problems of fatigue cracks (which were poorly understood), saving them them from having to learn the hard way, too. I've always felt that this openness has not been sufficiently acknowledged. It was a very beautiful aircraft and very comfortable (I flew in one in 1965) - much quieter and smoother than planes such as the Bristol Britannia.
@sandervanderkammen9230
3 жыл бұрын
BOEING was building modern all metal pressurized passenger airliners a decade earlier... when DeHaviland was still building WOOD biplanes.
@sandervanderkammen9230
3 жыл бұрын
@John Higgins But the Mosquito was not a durable or safe aircraft... in fact there are no original Mosquitos in airworthy condition due to their fragile wooden structure does not age well.
@petemaly8950
Ай бұрын
@sandervanderkammen9230 Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* De Havilland built many all metal construction airframe aircraft & pressurised aircraft & of course were building jet engines many years before the Comet. The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* . .... . ... ... . ... .. ... .... ... ..... . Ixivcx. xcxiivx
@Viper-dn8ix
3 жыл бұрын
Hey there Simon! Once again I am asking you to check out Denver International Airport! It's the second largest airport in the world, fifth busiest in the USA, and one of the busiest in the world! The airport is massive... Six runways, with an option to expand to more. And the terminal building is probably one of the more beautiful and inspired designs for an airport. Plus it's got some sick sunglasses! Kidding that's just the new hotel! There's also a host of conspiracy theories for you to unpack too!
@jamesmcgarrigle8671
3 жыл бұрын
Actually the Comet was beaten into service by the Russian Tu-104
@techauthor324
3 жыл бұрын
You forgot to mention that the DH Comet continued to fly, long after commercial retirement, as Nimrod with the RAF.
@sandervanderkammen9230
9 ай бұрын
The Hawker Siddley HS.801 Nimrod is not a Comet, it has a completely different type certification and shares nothing in common with the early failed airliner design.
@techauthor324
9 ай бұрын
Well, technically you could be correct, but the fins that i used to build used the same jigs for Comet and Nimrod.
@sandervanderkammen9230
9 ай бұрын
@@techauthor324 True, much of the tooling and fixtures were recycled and repurposed by Hawker Siddley, much of the de Havilland tooling was still NRW or like new as production of the Comet ceased after just 114 total airframes.
@jimtalbott9535
3 жыл бұрын
I'll put in my usual plug for the USAF Heavy Press Program - acquiring the technology to reduce or eliminate those rivets in the construction of jet aircraft! I'd also suggest the CANOL project, during WW2 - ancillary to the Alaska Highway project, but MASSIVE in scale.
@pushing2throttles
3 жыл бұрын
If aircraft manufacturing aren't mega projects, take a look at the Everett, Washington Boeing 747 assembly building. That building is so huge...I can't describe it with only a few words, but multiple Queen's of the sky are built, SIMULTANEOUSLY! That's MEGA
@boneo_the_muso3493
3 жыл бұрын
YEAH!!! You done the comet!! I commented ages ago for a vid on the comet and didn't even get one like.
@Sh_rib
3 жыл бұрын
Have a like on this comment then lol
@boneo_the_muso3493
3 жыл бұрын
@@Sh_rib Ah cheers bruv. one love👍
@PiersLawsonBrown1972
3 жыл бұрын
No mention of the Nimrod, which kept the Comet airframe flying until 2011.
@sandervanderkammen9230
9 ай бұрын
The Hawker Siddley HS.801 Nimrod is not a Comet, it is an completely different design and shares no parts or structures in common. Both aircraft were plagued by metal fatigue problems
@jvillan94
3 жыл бұрын
The Comet 4 in BOAC livery *chefs kiss 👌🏻
@NurmYokai
3 жыл бұрын
Missing Bonus Facts. 1948 - “English novelist and aeronautical engineer” Nevil Shute publishes the novel “No Highway.” Where the protagonist claims a certain aircraft will crash due to metal fatigue. 1951 - The film “No Highway in the Sky” is released. It is based on the novel “No Highway.” The fictional aircraft was the “Rutland Reindeer.” 1952 - The beginning of the de Havilland Comet crashes, due to metal fatigue. To be obvious, the other origin for “Comet” would be Santa’s reindeer. Not that this would be the only time fiction matched real life. "The Wreck of the Titan" (1898) where the fictional British liner Titan in the month of April strikes an iceberg and sinks in the North Atlantic. The Titan has insufficient lifeboats. RMS Titanic suffered the same fate in 1912.
@sandervanderkammen9230
3 жыл бұрын
Metal fatigue was in fact well-known and understood before the Comet Disaster... Boeing, Junkers, Douglas and Lockheed were building pressurized passenger airliners years before the Comet Disaster.
@SovereignwindVODs
3 жыл бұрын
I appreciate the willingness of those engineers to admit their designs were only as safe as they were because of the comets failures.
@sandervanderkammen9230
3 жыл бұрын
The Comet Disaster was the worst engineering failure in commercial aviation history. The construction of pressurized passenger airliners was not new, it was well-known and understood by the leading manufacturers. DeHaviland lagged decades behind, they were still producing biplane airliners made out of WOOD and fabric!!!!
@asiesjefa1758
3 жыл бұрын
@@sandervanderkammen9230 yes but what it wasn't well known and understood was the behaviour of cracks when they are under fatigue and THIS was what caused the accidents not just the pressurisation.
@sandervanderkammen9230
3 жыл бұрын
@John Higgins You don't get it do you? DeHaviland was decades behind in aircraft construction techniques. It had very little experience with building aircraft structures out of aluminum and almost no experience at all in safe use of metal riveted joints. The Comet was clearly beyond the technical ability of the company to design and produce..
@sandervanderkammen9230
3 жыл бұрын
@@asiesjefa1758 Apparently you do not understand... DeHaviland was more than a decade behind in transport aircraft design and construction. Metal fatigue was in fact well-known and understood. The Boeing 307 and 377, the Douglas DC4 and DC6, The Lockheed Constellation were all flying with pressurized metal airframe structures. long before the _Comet Disaster._ The Comet remains a shameful example of incompetence and criminal negligence in the aircraft industry.
@asiesjefa1758
3 жыл бұрын
@@sandervanderkammen9230 I'm just quoting what my university professor of this particular field says and yes, maybe it was known that cracks could spread with fatigue but it wasn't well-known as you assure because if so they would have tried to avoid high stress states (idk how it is said in English that) and they didn't.
@drgonzo305
3 жыл бұрын
Moving the city of Chicago, side project. Making a jet plane, megaproject...... I'm gonna need to see the criteria for your classification system
@AtheistOrphan
3 жыл бұрын
Fond memories of watching the last Dan Air Comets at Gatwick back in the day.
@SparkBerry
3 жыл бұрын
The crash investigation that found the riveting defect was revolutionary itself, and changed the way air crash investigations are conducted to this day. It alone could be a Megaproject.
@sandervanderkammen9230
3 жыл бұрын
Riveting aluminum was well-known and understood in the aircraft industry before the Comet Disaster... DeHaviland never got the memo, they were still building biplanes made out of WOOD and FABRIC in 1949!!!
@SparkBerry
3 жыл бұрын
@@sandervanderkammen9230 Yes I agree... I'm an aircraft maintenance engineer so I have a background in the subject. What made this different was lack of a knowledge when it came to the pressurizing of the fuselage in combination with the style of rivetting. We are taught even with solid rivets not to allow burrs to remain when drilling as this is a point where cracks can propagate from. This form of rivetting was fine on low performance unpressurized aircraft, but an absolute no go on these jets. The way they investigated and found the problem was game changing at the time
@sandervanderkammen9230
3 жыл бұрын
@@SparkBerry Not true, riveted aluminum airframes and pressurized cabins were nothing new when the Comet Disaster occurred...
@sandervanderkammen9230
3 жыл бұрын
@@SparkBerry Alot was learned by DeHaviland, there claim to fame was laminated plywood construction and the use of polyvinyl glue. The company had very little experience with aluminum and almost no experience in riveted fuselage design or fabrication. DeHaviland chose to punch the rivet holes rather than drill, used skins that were much too thin and did not install doubler joints... The Cohen Committee investigations found extremely shoddy workmanship in the riveting including loose rivets, cracked skins from rivets being over driven and misfprmed heads due to the riveting length being incorrect. Unforgettable mistakes today and unacceptable in the 1940s as well.
@erika002
3 жыл бұрын
Megaprojects is becoming an aviation channel...... *_looks at Wendover Productions_*
@nts821
3 жыл бұрын
planes get most views
@mammuchan8923
3 жыл бұрын
Can there be such a thing as too many plane videos 😅
@recka5000
3 жыл бұрын
And I'm here for it
@FQP-7024
3 жыл бұрын
Here's a Megaproject he could do: The Bristol Brabazon giant luxury plane
@bimblinghill
3 жыл бұрын
That's a good one. Kind of the UK equivalent of Hughes' Spruce Goose (commercially, if not technically).
@FQP-7024
3 жыл бұрын
@@bimblinghill I am revolted every time i hear that nickname just have it the H-4 and be done with it. (sorry it's at least 1 am here and I hate everything)
@bondisteve3617
3 жыл бұрын
Very good Simon....thanks!
@michaelwoodhams7866
3 жыл бұрын
In an interesting aside, in 1948 Nevil Shute (popular author and aviation engineer) wrote a novel No Highway in which a new (propeller) airliner will inevitably crash due to metal fatigue after a fairly well defined period of time. Notice that when the book was published, the Comet was under development but had not yet flown.
@sandervanderkammen9230
3 жыл бұрын
By 1948 metal fatigue was well-known and understood by the leading manufacturers like Boeing, Douglas, Lockheed and Junkers...
@Texassince1836
3 жыл бұрын
Well im early. Some body pass the *BLAZE*
@LeoStaley
3 жыл бұрын
Simon just make an airplanes channel and keep the mega projects here.
@blankseventydrei
3 жыл бұрын
Aviation fans have not forgotten and are amazed by the plane.
@sandervanderkammen9230
3 жыл бұрын
Aerospace engineers have not forgotten the worst engineering failure in commercial aviation history... we are all horrifed by what DeHaviland did.
@sandervanderkammen9230
3 жыл бұрын
@John Higgins *It was...*
@paulpaul9914
Жыл бұрын
@@sandervanderkammen9230 DrDikBummer / VinDurloo Krappen et al & co shows up here as well it seems spouting more total BS? Talking about Disasters? Please take some time to ¶S^ T. F °u if it's not too much trouble. *Air Disasters? Boeing 707 First single air disaster with more than 100 deaths.* en.m.wikipedia.org/wiki/Air_France_Flight_007 Boeing 707 865 Built. 174 destroyed during operational life is. en.m.wikipedia.org/wiki/List_of_accidents_and_incidents_involving_the_Boeing_707
@sandervanderkammen9230
Жыл бұрын
@John Higgins The Comet was the worst jet airliner in history.
@sandervanderkammen9230
Жыл бұрын
@@paulpaul9914 The Comet Disaster remains the worst engineering failure in commercial jet aviation history.
@Millsy.g
3 жыл бұрын
Here is a good idea. the Rogers Pass summit rail tunnel (Mount Macdonald Tunnel) and the Spiral Tunnels in the Kicking Horse Pass (Both in British Columbia Canada). Huge megaprojects that you can go visit today.
@joshfloyd691
3 жыл бұрын
The Berlin airlift would be a pretty good mega project. The us airforce fully supplied the city of Berlin, delivering upto 6000 tons of material everyday, using dirt runways.
@elcheapo5302
3 жыл бұрын
No mention of the Hawker-Siddeley Nimrod, essentially a Comet variant that flew into the 2010s?
@sandervanderkammen9230
3 жыл бұрын
The Nimrod was developed by Hawker Siddeley and introduced in 1970... DeHaviland was defunct by 1958
@petemaly8950
Ай бұрын
@@sandervanderkammen9230 Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* The Comet design had military use in mind, Nimrod work was in progress from 1953. The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* . .... . ... ... . ... .. ... .... ... ..... . Ivcxivcxivcxvxxccv xcxiivxccxvcccvxcvccv vivcxiccvcvcczcvcvxxcc
@667crash
3 жыл бұрын
Any presentation on the "Comet" also needs to include discussion of the "Avro Canada C102" and the "Tu-104". The "C102" actually flew thirteen-days after the "Comet" on August 10, 1949. The "C102" had a habit of not coming apart in the air and killing large numbers of people like the "Comet". The "C102" was killed by the Canadian Government or it would have probably become the worlds first operational commercial jet airliner. Unfortunately this was going to be a long trend for Canadian Companies. The TU-104 would go on to be the first successful commercial jet airliner. One of the great failings on the "Comet", was the arrogance of its designers, who refused to listen to American, German and Russian designers to not do what they did.
@sarrassgaming1537
3 жыл бұрын
You really should do a video on the concrete ships made in ww2 by various nations. Actual ships, made from concrete. Cool stuff.
@XSpImmaLion
3 жыл бұрын
ROFL, the coach snark, on point
@oliverwalton5314
3 жыл бұрын
You should do a video on the English electric lighting
@cmulder002
3 жыл бұрын
the picture of the pressure testing shown was AFTER the crashes ; it was done to find the failure points while the fleet was grounded.
@brianbaas8650
3 жыл бұрын
3:36 Fun fact: the picture you're seeing here is of Madurodam. A miniture version of the netherlands, built up over many years. And it's still being updated to this day
@AlbertCalis
3 жыл бұрын
Simon, please do a Megaprojects on the Bristol Brabazon.
@darkpepsi
3 жыл бұрын
@Megaprojects suggestion: The Ponte Morandi aka Viadotti Polcevera or known as in English Polcevera Viaduct bridge. Especially the design and the structural failure in 2018.
@milk-it
3 жыл бұрын
I love how the Comet is referenced against the 747 Jumbo Jet - which is being retired, but it's still the Queen of the skies. Love it.
@sandervanderkammen9230
3 жыл бұрын
The Boeing 747 is still in production...
@papanoel3999
2 жыл бұрын
I'm pulling double duty, watching this 1, then I'm going to watch the AIR FORSE ONE video. I do love abit of aviation.
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