AgentJayZ is from the future... which is now, but probably later than now... and better. Will my 56k modem work in the future? ;-p
@343jonny
12 жыл бұрын
This is some of the greatest information I have found on turbines. Can't really find this kind of info anywhere else nowadays! Thanks Walter!
@robertshannon6986
4 жыл бұрын
I loved working on this model jet engine especially doing the balancing of the fan blade assembly
@AgentJayZ
13 жыл бұрын
@thegraffitimonkey It is an engine that is not used in any currently economical airliners. It may still run, but to bring it back to commercial serviceability would cost over a million. And then there are no planes that use it.
@BatDan513
8 жыл бұрын
Great video! I think I have an idea as to why the stators behind the fan are separated into a core/bypass annulus (instead of one long blade). It's likely for aerodynamic reasons. In the bypass, you'd like to straighten the flow (no swirl) as the flow leaves for the bypass nozzle. On the inner portion however, some amount of swirl is advantageous for the rotating booster section. So that inner row of stator blades acts as more of an IGV to present a desirable alpha in the relative frame of the rotating booster stage. That enables the booster to do more work on the flow w/o the flow separating from the blade.
@AgentJayZ
12 жыл бұрын
That engine was called the UDF, or un-ducted fan. It was a very high bypass rear fan engine without a duct. I read that one reason it did not succeed was it was developed right when the high bypass turbofan engines we know so well were first introduced.
@ronvera
3 жыл бұрын
Juan Browne aka Blancolirio, brought me here. Outstanding Channel.
@AgentJayZ
12 жыл бұрын
That is exactly correct. If I called it a 747 engine, I was using the term 747 as a generic, conversational term to indicate the largest class of airliners, of which the DC-10 was / is. I try... try... to be more technically correct these days, as I have discovered the increasing sophistication of the knowledge of my viewers. Cheers!
@blahblah49000
Жыл бұрын
@AgentJayZ Thanks for pointing me to this video where you explain how the blades are connected and make that noise when turning slowly. So much content on your channel, which I have only recently discovered. :)
@JPTV-eu7xs
8 жыл бұрын
Hi Agent JayZ I enjoy your jet engine videos and Q&As. I worked for 29 years at a jet engine MRO at Love Field in Dallas Texas from 1967 to 2003 (as a mechanic, production control, detail parts inspector and lastly as a quality control inspector, mostly on Pratt & Whitney PT6, JT3C (military J57), JT4A (military J75) and JT8D also GE J47 & CF6, CFMI CFM56, IAE V2500, Allison 250 & J33. One of my favorite jobs was static balance of the rotating turbine & compressor components and dynamic balance of the turbine & compressor rotors, do you perform balance operations at your shop? Do you have borescope video of an engine after a bird strike? Thanks for taking me back in the day when I was hands on in turbine engine work looking forward to more. Blessings
@AgentJayZ
14 жыл бұрын
@GenXCypher An industrial Spey. Altered by a cropping of the 1st stage compressor blades, eliminating the bypass airflow. ... So it's not a fan, but it doesn't have any struts in front of it, so it looks great when turning.
@davidholman6276
9 жыл бұрын
I get to see these things on a nightly basis:)
@AgentJayZ
13 жыл бұрын
@slamdvw I think it is intended to scare birds away. They don't ever seem to make it through the fan in one piece.
@MysticalDork
12 жыл бұрын
yup. also, another reason it did not succeed is that fuel prices dropped dramatically during the development phase, which made the hi-bypass turbofans look more appealing again because the technology was already fully-developed. I seem to remember that there were claims of higher efficiency than even the hi-bypass TFs though. I think I read a news article that speculated about an increased interest in UDFs again due to fuel prices rising once more. Keep up the great work!
@AgentJayZ
14 жыл бұрын
@GenXCypher The LP system uses Ball and roller bearings, like the HP system. Think of the HP system as a large turbojet, with an airflow of 150 lbs per sec, and producing supersonic exhaust. The LP system puts a turbine in that exhaust to drive a fan, which produces an airflow of over 1000lbs per second at subsonic velocity. The closer the speed of the engine's exhaust stream is to that of the airspeed of the aircraft, the more efficient the whole arrangement will be.
@AgentJayZ
14 жыл бұрын
@GenXCypher The LP (low pressure) turbine takes over 80% of the power made by this engine, and uses it for one purpose: to turn the fan. The reason the fan turns so easily is because it is not connected to any gearboxes or shafts or anything else. The LP turbine is driven by the gas stream coming out of the HP turbine. The HP system is what drives the fuel and oil pumps, is connected to the starter drive and the electrical generators.
@pkwithlemur18
Жыл бұрын
Big fan mean big bypass high bypass
@AgentJayZ
13 жыл бұрын
@LeVonDanE Aircraft scrap goes for 20.00 a pound, last time I checked. This thing as almost five tons. No we don't do that, but places in Florida do.
@MrBigGuy1
12 жыл бұрын
True AgentJayZ that I'm "Well, you're about a hundred weeks late...". But I still enjoyed such a detailed video explanation and I love everything about big fans, that's why when was "googling" videos on a specific CF6-80C2B4 (B767-300) engine I came across your nice video. My "passion" and lucky same weeks ago to order, later help one engineer to balanced and positioned all 22 carbon-fiber FAN blades and 22 platforms for the mighty GE90-115B, such a great enormous engine! Take care, rgds
@AgentJayZ
14 жыл бұрын
@mytmousemalibu ... this was arguably the first civilian High-bypass engine. The other turbofans that came before it were what are now called low-bypass ratio turbofans. The bypass airflow was about equal to and sometimes less than the core airflow.
@MysticalDork
12 жыл бұрын
RE: fan on the back. There was a prototype engine built that had two counter-rotating, adjustable-angle un-ducted fans mounted on the back of the engine. The idea was to reduce noise and increase efficiency by removing the duct, which created significant drag. That engine was nicknamed the 'flying cuisinart' due to the exposed props/blades. I guess technically it was a turboprop and not a turbofan though.
@Buelligan88
7 жыл бұрын
I gotta stop watching these videos at night!
@AgentJayZ
11 жыл бұрын
Some engines do use composite fan blades. Many use metallic blades, usually a titanium alloy.
@ChrisZoomER
4 жыл бұрын
That engine looks like it's seen better days.
@AgentJayZ
4 жыл бұрын
It's retired from airline service, so it definitely has.
@AgentJayZ
14 жыл бұрын
@TheGreatSteve I think to remove / reduce the angular component of the velocity of the fans discharge air. Push it more straight back instead of swirling it. Also, you can't see by looking at it, but I'll bet the fan stator comprises a slightly convergent pathway, thereby using the slight pressure rise imparted to the air by the fan to accelerate it, which would improve total thrust.
@AgentJayZ
13 жыл бұрын
@pikupmyfork That's interesting and impressive. Blending blades takes a lot of skill, knowledge and judgement. It's a more important job than many people think. It's not easy, and the requirement for quality is extremely high.
@marcwolf60
11 жыл бұрын
I take it that the fan shaft is connected to the output turbine shaft. I was watching your power turbine video and it seem to indicate this. Many thanks Marc
@TheMan1510
13 жыл бұрын
Your videos are really interesting. Thanks for posting them!
@acs197
12 жыл бұрын
Sure it's an older turbofan, but she's still a beautiful piece of engineering.
@AgentJayZ
14 жыл бұрын
@bamaslamma1003 So far the only P&W engines we have worked on are the J52 out of the EA6 intruder, but you never know what's on the horizon...
@AgentJayZ
12 жыл бұрын
Not this one, but the same model of engine. You don't want to know which particular airliner it was once attached to...
@johnm400uk
12 жыл бұрын
It was posted on the Holset Turbo Facebook group in feb. I know it sounds impossible but theres also a pic of the turbo internal showing the turbine, compressor and a fan on the front end! It looks really cool but not sure if it would work unless it had a seperate drive front a pulley or something? Holset actually commented that lots of manufacturers have been testing similar things.
@AgentJayZ
12 жыл бұрын
Yeah, dude! Don't worry, have fun. I keep getting reminded that there are a lot of knowledgable people out there, which only makes me better... because I know I can't BS you guys. I want to be an accurate source of what info I have. If I don't know, I'll admit it... but also, if anybody makes a statement that is wrong, I get rid of it. GP257 is correct here. It's most important that we all have fun !
@robf93
14 жыл бұрын
@AgentJayZ 0 The JT3D was a low-bypass turbofan engine, with a bypass ratio of 1.4:1 according to some sites on the internet. I'm not sure, but I think it may have had differing bypass ratios as there were a few different models of the JT3D and TF33 with differing thrust ratings. Also, the JT3C could be turned into a JT3D via a kit Pratt and Whitney supplied that replaced a few low-pressure stages and added the fan assembly. The first production bypass engine was the Rolls Royce Conway.
@teenflon
4 жыл бұрын
Did you ever get this running? Would love to see a video of a turbofan running
@AgentJayZ
4 жыл бұрын
Parts of it were used to complete the build of an LM2500. Featured in my videos called Turbofan Parts Donor.
@davidwarda5616
8 ай бұрын
I feel like this thing would suck a huge amount of air if it was either at full take off thrust or idle. correct me if am wrong@@AgentJayZ
@AgentJayZ
13 жыл бұрын
@thegraffitimonkey You could find one of these at an aircraft boneyard in Arizona for less than what the one on Ebay is going for. But, the thing weighs about 5 tons, and is very delicate and easy to damage. removing it from the aircraft and moving it to your house without damaging it is a very big job for a crew of people with specialized experience..... then what? I would suggest trying to obtain a smaller engine.
@mytmousemalibu
14 жыл бұрын
Whats the story behind thius sucker? and plans for it? Those fan blades are pretty big! Bet the price is too! How old is this one? Thanks Jay!
@AgentJayZ
14 жыл бұрын
@mytmousemalibu We were not given any records, so the hours and date of manufacture are unknown. You can learn as much as we know by searching for CF6-6... No, not the CF6-50; this one precedes that. This was the first civilian high-bypass engine. Bo current aircraft use the -6, so it was bartered for. Plans? I am not at liberty at this time...
@MrBigGuy1
12 жыл бұрын
yes, yr engine CF6-6 was modeled after the militair TF39 for use on the Douglas DC-10 and Lockheed L-1011. Pratt & Whitney, Rolls Royce, and GE fought against each others to win contract, but both United Airlines and American Airlines in the spring of 1968 selected this 40,000 pound thrust GE CF6-6 engine to power Douglas DC-10-10 aircraft.
@atourdeforce
5 жыл бұрын
I couldn't watch this. It was fuccin with my eyes watching it spin so close up. Lol
@bamaslamma1003
13 жыл бұрын
@AgentJayZ In a way you have worked on a JT8D. The JT8D is the turbofan version of the J52. Both cores are identical.
@AgentJayZ
14 жыл бұрын
@1986bahai You seem like a smart guy. I bet you knew all that anyway, so you could have written it your way.
@tisoy909
11 жыл бұрын
About that clicking noise, well i still hear this sound on the A320s when theyre winding down when they pull up to the ramp. This sound is pretty much the same thing, as what i can hear when you were spinning up the fan.
@HesJustSteven
12 жыл бұрын
Yeah I can see that, at least you know that a CF6 is used on a 747, but against that, at least you got film of a very good looking engine
@12345fowler
5 жыл бұрын
Hello AJZ are you sure the holes in the air intake are for noise reduction ? I tought that was for sucking stagnant air (couche limite in french, don't know in English sorry ?) How deep are the holdes and where do they lead to ? I mean is there any circulation of air going trough these holes leadintg to somewhere ? Thanks for your work I really like the way you talk and make your point. Very clear and articulate. Keep 'em coming. Cheers
@AgentJayZ
5 жыл бұрын
We do not need to figure out what the holes are for. They are in the inner layer of a two layer honeycomb material used for sound attenuation. It is described in al of the books I recommend.
@AgentJayZ
11 жыл бұрын
There is no "output turbine" in this engine. All turbines have only one purpose: to turn the energy in a moving stream of fluid ( usually gas, but sometimes liquid, like water) into mechanical torque. There is a hi-pressure turbine, which powers the compressor for the core in this engine. There is another, low-pressure turbine which powers the fan. If this makes sense to you, then you can see how the term output turbine can be confusing.
@mytmousemalibu
14 жыл бұрын
@AgentJayZ Thanks Jay! I understand! I was just curious about it, very neat! Wondered if you guys were gonna get it running for some actual use or just for fun or what not, that why i ask, lol! Ill hafta look but i thought the first civilian turbofan was the JT3D derived from the JT3C? Fantastic noise they make! The TF39 you mentiond is pretty cool too. Not as clean looking as you mentioned but very odd looking intake with the 1st stage ahead of the fan! The sound of n old C5A is Cool! Thanks!
@Helicopterpilot16
14 жыл бұрын
hey thanks alot for posting this finaly, whats your estimats to get it runing? Are you going to do a complete overhaul?
@AgentJayZ
12 жыл бұрын
Well, OK.. I believe you. A two stage compressor would be more efficient.. but an actual thrust producing fan would in my opinion not be a good idea.
@bamaslamma1003
14 жыл бұрын
Ever had a JT8D engine? Commonly found on DC-9's, Boeing 727's and 737-200's, and MD80's.
@SpringDivers
10 жыл бұрын
Forgive me if you've covered this, but where do you procure these retired engines? Great video. Thanks much.
@AgentJayZ
14 жыл бұрын
@SoniaStrumm55 My sources say the CF-6-6 has a bypass ratio of 5.8 to 1
@SKNK5050
14 жыл бұрын
I am in love with this thing already just the idea you might be doing a test run on it at some point excites the hell out of me. :^o
@AgentJayZ
12 жыл бұрын
I'm sure someone who has actually made their own combustor would be happy to talk to you. Some of my long time viewers have become quite successful in their projects. I hope they contact you...
@johnm400uk
12 жыл бұрын
That was exactly my thinking. I dont see what a big fan would achieve. It looks more like a variant of a core booster in the pic. No doubt they would market it as a turbofan though just because it sounds very cool!!
@Helicopterpilot16
14 жыл бұрын
@jdmk20aek Yes a great percentage of the thrust created by a hi bypass turbofan, yet the pure exhaust still producecs some thrust.
@jdmk20aek
14 жыл бұрын
so the purpose of the fan part is to flow mass ammount of air to propell the aircraft?? and the actual combustion power is used to tuen this huge fan ????? if so AWESOME !!!
@JasonWaterfalls13
14 жыл бұрын
Excellent vid!! That is an impressive engine! How many hours does it have on it?
@zodiotekgaming
9 жыл бұрын
Looking forward to seeing this baby running.
@AgentJayZ
9 жыл бұрын
+AlmightyBanger This engine was a parts donor, featured in my Turbofan Parts Donor videos. The engine that the parts went into runs in my video Land Engine, Aircraft Turbine - Big Power... or something like that.
@zodiotekgaming
9 жыл бұрын
+AgentJayZ huh, I see. Though it would have been a nice treat seeing this puppy in the test cell.
@LeVonDanE
13 жыл бұрын
If you took it apart and sold it as scrap metal, how much do you think you could get? Do you guys ever do that?
@DinoAlberini
11 жыл бұрын
I think it's because they were more likely than metal to shatter on impact, but don't really remember. I've read it on Flight.
@robf93
14 жыл бұрын
@robf93 Also according to my research, the designation used for the JT3D conversion from the JT3C turbojet was an "MC6" added to the end. I know a fair bit of 707's were converted, and at least several 720s. AgentJay, I'm not sure if you've heard of this but given your huge amount of expertise on all things turbine perhaps you have. Have you ever seen or worked on a JT9D with water injection? Apparently early models had them, in quite the odd combination of high-bypass and water injection.
@carlossantos5469
6 ай бұрын
Nice machine
@slamdvw
13 жыл бұрын
What is the spiral design on the cone? Seem to see that a lot on turbofan engines. Good vids by the way!
@annasstorybox7906
5 жыл бұрын
It's to show ground staff wether the engine is running and how fast so they can quickly see which engine they better stay clear of.
@Pinecornranch
11 жыл бұрын
the noise that's being made is frome the mid-span shroud. when the engine speeds up they wont make noise anymore.
@MrPyroproductions
12 жыл бұрын
Yup, thats exactly what my jet engines book ive been studying said, the fact that it did not succeed because the turbofan engine came out right when the UDF came out.
@AgentJayZ
13 жыл бұрын
@bamaslamma1003 Even though I have never worked on a JT8D... I do like that engine. We had one at our training center. Maybe someday...
@tensecondbuickgn
4 жыл бұрын
Why do the newer airliner engines make a buzzing sound at full power? Someone said that it was the fan blades traveling above the speed of sound. Is this true. As a retired master mechanic, I can't help but be nervous when I'm flying because it sounds like a really wasted bearing about to let loose lol
@AgentJayZ
4 жыл бұрын
I love the 3.8 turbo. What kind of special noises does it make with the pedal to the metal? And it's putting out 400 Hp? Around there? The modern airliner engines use a fan to make most of their thrust. Those fans are using 30 to 80 thousand HP, depending on which engine we are talking about. That much power in such a small package is going to make some grinding and ripping sounds. It's the atmosphere groaning in pain. Any actual mechanical degradation or damage would cause vibration, which is monitored by sensors on the aircraft.
@AgentJayZ
12 жыл бұрын
Be interesting to see that, but I think someone is pulling your leg...
@AgentJayZ
13 жыл бұрын
@thegraffitimonkey We obtained it. There's another CF6 for sale on Ebay. It's totally worn out, and the seller wants 100,000.00 It's not worth that...
@MrGoldman9
4 жыл бұрын
Can you explain and give more details regarding the BT speed of the engine the whole you mention inside the engine intake ? Is that are different from the normal N1 speed What do you mean or They’re playing speak which is I believe through the pitot state Props on the noise of the Airplane. ? Again thank you very much for deep of my heart for all your video please keep making video keep making history thank you very much from overseas pilot
@AgentJayZ
4 жыл бұрын
Hmmm... I don't understand anything you said here... Seriously.
@MR2LW
14 жыл бұрын
that engine seems to turn really freely... does the bearing for the low power section (including the fan) require oil to turn freely? it seems to rotate well without it.
@Sta2200
8 жыл бұрын
If only that engine could talk...imagine the stories of all the people--from many nations...it has hauled around during it's lifetime !!
@Razorxyzify
8 жыл бұрын
hi
@DinoAlberini
11 жыл бұрын
Carbon fiber was used by RR in the late 60s but was eventually replaced because it was too fragile.
@AgentJayZ
12 жыл бұрын
Hmmmm, if you pedaled as hard as you could, how fast would you be able to turn a fan that normally consumes 25 thousand Hp ?
@munky123jw
7 жыл бұрын
cf6-6 was only used on the dc-10. the cf6-50 was used on the 747-200B. all 747-100 used the p&w jt9d.
@severest75
4 жыл бұрын
is the whole structure of the engine behind the fan (fuelpumps, filters, lines, manifolds, actuators) exposed to the bypass air or is there a cover to make for a smooth airstream?
@AgentJayZ
4 жыл бұрын
Almost all of the accessories are mounted on the outside of the fan case, so are not in the air stream.
@BradBo1140
Жыл бұрын
Interesting the first stage stators are designed a bit different to supply the second stage for burning fuel.
@AgentJayZ
Жыл бұрын
Any stators in the compressor are a long way away from where the fuel is burned. Right behind the combustion section, there are structures that can be called turbine inlet stators, but they are usually called turbine nozzles...
@HesJustSteven
12 жыл бұрын
Thats A CF6-6 which is used on a DC-10, the 747 uses the CF6-80C2
@sanderchristoffersen
11 жыл бұрын
Isn't the perforated piece just in front of the fan, for sound reduction? or is it to heat air to avoid ice on the blades, by leftover heat from combustion? Whats the price for a retired engine like this CF6-6 ? It's really a piece of art !
@AgentJayZ
11 жыл бұрын
I do think the holes are there to make the surface less effective at reflecting sound, so it's for noise reduction.
@metalmike669
8 жыл бұрын
Very interesting and you answered some questions and showed some real cool up close views, like the blade clearance. I am assuming the fan runs on sealed roller bearings? Know anything about servicing them? And because it's a turbofan and not directly connected to the internal drive shaft, when the engine is started up, does it slowly pick up spinning RPM's due to the later stages of the engine producing thrust and suction?
@AgentJayZ
8 жыл бұрын
+Mike Haire Hmmm... basically yes, with the details a little fuzzy. You may enjoy watching my videos called Turbojet vs turbofan, and Twin shaft turbine engine bearings.
@fordfreak2007
8 жыл бұрын
+Mike Haire No jet engines have sealed bearings that I know of. The low pressure sections of modern jet engines actually start spinning fairly quick. The Low pressure shaft most likely starts spinning due to the air flowing through and because of the energy transferring from the high pressure shaft, through the bearings, to the low pressure shaft. Most gearboxes are connected to the high pressure shaft. I worked on the F108 (CFM56-2B) for 5 years. For scope inspections, there was a crankpad cover that was removed where you could connect a ratchet to rotate the high pressure sections. You could spin the fan if you cranked on the ratchet fast enough. We'd jokingly ask the person rotating the high pressure section if he/she was trying to start the engine when that happened. FYI, The TF39, only found on C-5A/B/C models, start procedures stated that you were allowed a maximum of 5 minutes run time before the low pressure section started turning. You had to shut down if the fan/low pressure section didn't start turning after 5 minutes. I never saw that happen. It did take a while in colder weather sometimes.
@AgentJayZ
8 жыл бұрын
+fordfreak2007 All bearings in a turbine engine are installed in a sealed sump or chamber. Sometimes that chamber can have more than one bearing, as is the case with a gearbox housing several drives. What many people call sealed bearings; those grease -lubed ball bearings with a little plastic "seal"... there are none of those on any engine I've worked on. But to my mind, if a bearing is protected from oil loss or contaminant entry by carbon seals or air seals or both.. it's a sealed bearing.
@fordfreak2007
8 жыл бұрын
I guess I'm one of the many then. I was also thinking of sealed automotive turbos. They don't connect to the engine oil system at all. I'd have to look up some more CFM56 stuff. I think one of the bearings might not be sealed on those. I know the air/oil separator is internal. The air vents out the rear of the low pressure shaft.
@AgentJayZ
12 жыл бұрын
On this one, yes, you could play hide and seek ! Behind a running CF6 at takeoff power = instant death...
@backyardscienceguy
10 жыл бұрын
While reading about modern fighter planes in Wikipedia, I noticed that quite a few use "low-bypass turbofan" engines. I presume that means a low amount of air bypasses the HP system and heads out the back, relative to a high bypass engine, like a commercial airliner. Why do modern aircraft use this engine configuration? Wouldn't they encounter the same issues with shock waves when going supersonic as a commercial turbofan? And what the heck is "super cruise?" Yes, I know, it is cruising at supersonic speeds, but how can a turbofan of any kind accomplish this?
@lone_patriot-
8 жыл бұрын
The military use turbo fan type engines due to the higher operating efficiency and the ability to aid thrust augmentation when using the augmenter(afterburner). In the case of the F110-GE-100C engine used on most F-16C's the bypass ratio is around 30% secondary airflow(bypass) and 70% primary airflow(core engine). now with supercruising, engines like the F119-PW-100 used on the F-22 achieve this super sonic speed with out using the augmenter due to the high dry thrust(no Aug.) output of the engine. as well as a high thrust to wight ratio.
@danielambrosio6134
6 жыл бұрын
So nice!!...it's really rare....this is a first type of CF6... produced to DC-10-10 and A300B... was equipped with a fan core reverse. is this your? can you tell us a manufacture year? 1972? 1973? thanks!
@AgentJayZ
12 жыл бұрын
@ipadize Yeh... you should watch the most recent videos...
@ascii211
12 жыл бұрын
Hey Jay so this is the engine that blade I got was from.... Ooooh shiny!!! :D I wish I had one of these in my backyard (ahem...) lol too expensive...;( D: Btw that blade has really made my Gearhead girlfriends day! Thanks so much!!! I'll post my unboxing parts as a video response on one of ur vids!
@Pyanities
13 жыл бұрын
I Like your Explanations! Very Easy to Understand :) (I am German)
@sqeeky100
13 жыл бұрын
@slamdvw i always thought it was there so that you can see that the engine is running if you can't hear it .. like the yellow tips of props
@mattdaddy_888
8 ай бұрын
If you were to spin that fan fast enough by hand would you feel a small suction?
@AgentJayZ
8 ай бұрын
There is no such thing as suction. If you turn the fan even a few rpm, you can feel it moving air.
@mattdaddy_888
8 ай бұрын
@@AgentJayZ like even standing at the front you can feel it moving air right? That's good that means it's very aerodynamically efficient if you can feel it moving air with just a little bit of rotation by hand imagine how powerful it is even just at idle it's able to taxi a whole jet at idle.
@fdesmet
10 жыл бұрын
When a fan blade is smoothed to remove a crack or other damage, doesn't the fan disc become unbalanced? I'd think that a difference of even a gram or two, at that diameter, at that speed, would produce a lot of (centrifugal) force.
@AgentJayZ
10 жыл бұрын
Small repairs are ignored. And major damage would require a blade replacement. That, or multiple blade repairs would require a rebalance.
@343jonny
12 жыл бұрын
@AgentJayZ woooops! Did I say Walter? sorry! my bad! haha. Saw him in one of the videos and remembered the name because I was laughing. Love your vids!
@johnm400uk
12 жыл бұрын
I heard that some of the Turbocharger manufacturers have been experimenting with putting a fan on the front of their turbos. Not sure it would work myself but wouldnt it be cool to have a 'Turbofan'ed' car!!
@vincentbodwell8639
6 жыл бұрын
will it run? btw loving your videos
@MR2LW
14 жыл бұрын
only video of a fan eh?? i thought you had vids of a spey on here :P
@piyushrathore5816
7 жыл бұрын
Sir please tell about spiral being painted one the center of fan... And your videos are really informative..thnks for that...
I read about jet engine turbine/comp. blade operation; a term called "creep". In which the blades have a tendency to stretch outward during operation. My question is in the clearance of the tips of the blades with the inner casing when the engine is not operating. Has there ever been any consideration in letting the tips of the blades scrape the inner casing walls to, lets say break in or conform to the inner casing to form a perfect fit so there be O clearance when the engine is working at maximum power. something like a piston engine break in so all the internal parts conform to one another. I hope this question makes sense.
@AgentJayZ
8 жыл бұрын
+Gilbert Menendez Yes, many engines are designed to operate at near-zero clearance, as any leakage past the blade tips is wasted power. This is why blade creep is a problem; there is no clearance. I have shown in a few of my videos the abradable turbine tip seal material, with a patten worn into it that matches the end of the blades like a bullet matches a barrel. Can't remember which one, so I suggest you watch them all.
@AgentJayZ
12 жыл бұрын
@343jonny Are you thinking I'm Walter? ? ... 'cause he's not gonna like that.
@robertshannon6986
5 жыл бұрын
Used to work on these jet engines ge Ontario California
@pikupmyfork
13 жыл бұрын
I'm kinda new into the whole aviation deal, but I just blended my first fan blade today. ;D It wasn't Boeing, just an A300-600 Airbus.
@SoniaStrumm55
14 жыл бұрын
I am just cerious, what is the bypass ratio of this engine?
Пікірлер: 216