Hey why you guys have only 61 likes you are famous
@kristoffergaard8648
5 жыл бұрын
HEY! I know you!
@zhurs-mom
5 жыл бұрын
Actually i came here beacuse of the aurora video
@Fy12-c5p
3 жыл бұрын
Love your channel
@headkickko609
5 жыл бұрын
It just saddens me to hear a guys voice and see his marvellous mind at work and find out through comments he has passed away. Rest in peace Sam.
@bruh7230
4 жыл бұрын
God damn Rip
@kurniadi9829
3 жыл бұрын
GOSH! Just feel awful to learn the news. Just know you today and you are already gone. Rest in peace. Thanks for the wonderful sharings. God bless you.
@pmrb1984
2 жыл бұрын
This is sad news! How he Died?!
@Ashatechdotcom
Жыл бұрын
So Sorry...may his soul continue to rest in eternity
@liammartin8773
7 ай бұрын
so ahead of his time man
@briansmobile1
6 жыл бұрын
You not only provided the information to be easily understood, but laid a trail for further study and gave credit to your sources. That's character right there. Thumbs up.
@tajarv
3 жыл бұрын
Amazingly well done. Thank you
@zaggery
8 жыл бұрын
"then I was quickly reminded I had no idea how to use this thing...." That was the best part of the video. =)
@norbert.kiszka
3 жыл бұрын
In computer software its very often - when You dont have manual, its complicated soft or You just dont wanna read manual that can be printed on 5000 pages long...
@propellerplaneprods
8 жыл бұрын
Pro pilot, former aero engineer, and Rc dude here.... Great video, wonderful visualization and outstanding explanation!
@SammSheperd
8 жыл бұрын
You sound like my kind of guy, thanks for the comment!
@RenKnight347
Жыл бұрын
@@SammSheperd Vortex generators ideal location, with respect to the wings on your rc model, would be to have them, right where you positioned them to help in keeping the all important airflow going across the upper surfaces of the ailerons. This aids in reducing the possible chances of a wingtip stall by keeping the ailerons effective that much longer during high angles of attack. The closer the angle of attack (imaginary line, also known as the wing's chord line, extending from trailing edge through the leading edge on the cross section of the wing, with respect to the relative wind) approaches to somewhere between 17 to 20 degrees, the stall will occur. Vortex generators allow the wings to get closer to that 20 degrees mark within a margin of safety. I have even seen them used on the bottom side of the horizontal stabilizer for aiding in helping the elevator stay effective should the aircraft become in a high angle of attack, NOSE DOWN attitude.
@vito7056
8 жыл бұрын
Most relatable moment @ 4:21
@izzyman556
6 жыл бұрын
I laughed out load when he said that, Feels like me on so many levels lol
@poseidongaming8322
6 жыл бұрын
This joke felt like a casually explained video, he even has a similar voice.
@CaseyBarmakian
5 жыл бұрын
I was about to leave the same comment.
@jimross898
4 жыл бұрын
My heart aches. So much talent. Inquisitive mind. Ability to demonstrate complex subjects in simple terms. Thank you for your work, Samm. It lives on and provides guidance for others like me who aren't so bright. May you rest in peace. You and this channel are a gift that keeps on giving. May your family find solace in that.
@Kabab
Жыл бұрын
I think about Sam at least every couple months. He was such a great guy. I never even met him in person and we worked so well together. I can only hope there's something beyond life for him to exist in. He was just too wonderful of a person.
@liammartin8773
7 ай бұрын
@@Kabab what happened? howd he pass?
@Kabab
7 ай бұрын
@@liammartin8773 unfortunate motorcycle accident. Such a fantastic guy. The world really lost someone special that day.
@chrisboyce6542
8 жыл бұрын
If you are not a teacher then you should be, our youth needs somebody like you to demonstrate how things work and lead their minds to question why , your explanations are concise and more over interesting. You are doing a great job of teaching and keeping OLD DOGS like me interested and learning more thanks for you work. Chris
@SammSheperd
8 жыл бұрын
Thank you! That means a lot
@johnlbales2773
7 жыл бұрын
Samm Sheperd Yes, you are doing great things, but I'm worried about your health. Do you sleep? I came across your backpack video and this is my 2nd video of yours I've watched & enjoyed. In the aftermath of the pack fire, dude just don't burn your your candle at both ends. You knew better than to not test it on the bench first. That could have gone a lot worse in a hurry. Bring a multi level fire extinguisher next time. It was like you didn't go thru your preflight checklist just because your feet were on the ground. Make time to just unplug and chill a couple of times a week at the least. Better would be every day, like one hour at morning or before bed. I want to see some color in your face and visible signs that you are taking care of yourself. All the best.
@slevinshafel9395
6 жыл бұрын
Yeah this we need at University. Not only formulas how no one understund from where they come.
@richardperry21
5 жыл бұрын
Chris, did you not here he was getting his CFI???
@richardperry21
5 жыл бұрын
SORRY: (CFI) = CERTIFIED FLIGHT INSTRUCTOR
@acecomer98
5 жыл бұрын
As an aerospace engineer myself, I can say that it's nice to see others, not in my field, that enjoy flow theory. Great video, nice short yet explanitive video.
@siddhantchaudhary4946
5 жыл бұрын
RIP samm Shepard 1994-2018
@oracuda
5 жыл бұрын
@Nadir Seyfullayev He died, check recent videos
@kurniadi9829
3 жыл бұрын
GOSH! Just feel awful to learn the news. Just know you today and you are already gone. Rest in peace. Thanks for the wonderful sharings. God bless you.
@AchiragChiragg
3 жыл бұрын
@@kurniadi9829 I just found his video today too. Rest in Peace.
@copiercer
8 жыл бұрын
As a "NOT an aerospace engineer", I would have to say your doing pretty well... LOL.
@AugustusTitus
7 жыл бұрын
He's right, you know. You're a good 1/4 into an AE.
@ghg789987
6 жыл бұрын
Im so close. Got another year and a half and ill have my AE degree!
@JorgetePanete
6 жыл бұрын
Chris Rohrer you're*
@kirbylee57
6 жыл бұрын
What is an AE degree?
@ladieman050893
6 жыл бұрын
Aerospace Engineer,sub branch of mechanical engineering
@spinosaurusrex11
5 жыл бұрын
One of the best explanations of drag and aerodynamic friction I have encountered. So sorry this fine young man is no longer with us.
@AndrewNewton
8 жыл бұрын
Brilliant Sam. Excellent explanation and illustrations. I learned a lot.
@mrcannotfindaname
7 жыл бұрын
What you have explained in less than 5 mins is worth university lecturer 2 hours of pay. (comment from an undergraduate)
@gillesbkf4315
5 жыл бұрын
mrcannotfindaname, well there isn’t any calculation, yesterday I had a course on exactly this topic, but after 2h we were able to compute forces like drag or lift. That’s the little difference.
@Vysair
5 жыл бұрын
@@gillesbkf4315 Im sure with good video like this you can dramatically reduce the amount it took to learn the calculation behind this because a video can reveal more information and easier to understand than what was drawn and written on a whiteboard with a lecture.
@cephalonplant4087
5 жыл бұрын
@@Vysair we all know if colleges and universities were meant to be effective in teaching properly they wouldnt need to charge a single person 20k or more to learn what they need for the career
@gillesbkf4315
5 жыл бұрын
Vysair its actually not a white bord, it’s on a kind of power point but the professor annotates it a bit, and goes freaking fast. It’s at the EPFL, is some ratings it figures in top 5 world wide universities 🤷♂️
@tkdboy0182
4 жыл бұрын
@@gillesbkf4315 And gain an appreciation of the governing equations that allow you to do this
@JETZcorp
5 жыл бұрын
Dude, this video is beyond quality. The animated visuals were tremendous.
@stephenm3874
7 жыл бұрын
What you have in abundance is talent and insight. I once led a team of high level web application programmers, many with advanced degrees. The standout was a friend of mine with a GED and he blew away most of them. Never underestimate pure enthusiasm.
@MrZorroZorroZ
5 жыл бұрын
Rest In Peace Samm. You were a great engineer and an even better teacher. We will miss you :(
@aries619tiger
5 жыл бұрын
Coming from an aeronautical engineer, you are preety darn good at this stuff. Keep up the good work Samm!
@Greyhamaphone
5 жыл бұрын
If only. Such an amazingly smart creator and maker.
@findingpebble8615
5 жыл бұрын
(I just saw he passed away... Rest In Peace Samm) Im proud of my Samm's ! good job man , your way of explaining is very easy to follow along. getting ready to take my O&P so im just reviewing as much as I can. THANK YOU SAMM! - Samm G.
@timmyfriday2718
6 жыл бұрын
Finally, an understandable bloody explanation of wingtip vortices! Thanks mate ... the difference between the explanations of a curious person and merely an educated person is huge, and you nail it!
@lyle.justin.stoffels
5 жыл бұрын
another cool vid to end up in my recommendation list.. R.I.P Sam 😞
@alecto1550
5 жыл бұрын
Is he dead?
@calebready7572
5 жыл бұрын
@@alecto1550 he passed away about six months ago sadly in a motorcycle accident
@londart7040
7 жыл бұрын
Hey Sam I am a 7000 hr flight instructor and I really enjoy watching your videos your use of your energy reminds me of my youth the future is yours, blue skyz .
@dinosoarskill17
4 жыл бұрын
Aw man Sam would have loved how far and accessible printing has come
@makarlock
6 жыл бұрын
Rip Samm. Fly safe old pal. Definitely one of the diy aviation YT greats
@hectorsapien2016
4 жыл бұрын
your graphics used to explain these principles helped me understand the physics involved...GREAT!! THANKS
@Jmersh
8 жыл бұрын
That VR6 noise....
@SammSheperd
8 жыл бұрын
You guessed it! Had to show that off just a little
@mjh5947
7 жыл бұрын
I was interested and then I saw the Mk4 Jetta in the "wind tunnel"... and you had me. too bad it's not a TDI though ;)
@jooj240
6 жыл бұрын
Is it a Manual? nice Jetta
@c678thefirstandonly
6 жыл бұрын
Listen to that shift, it has to be.
@dayneellison3533
6 жыл бұрын
I love mine
@samuelhopely4853
7 жыл бұрын
I've been a fan and causal student of aerodynamics for a few years, and this is the first time that I've fully understood vortices and low pressure zones. Thank you!
@SammSheperd
8 жыл бұрын
In Short:What they do: They help air to flow around things (shrink the wake/separation bubble) and help air stay attached to sloping away surfaces (like wings at large angles of attack.) How they do it: They "energize" the boundary layer by mixing the slow layers with fast layers. Vortex generators are nothing fancy. Any little fin sticking in the air at an angle to the wind will work. there are even other non "fin" type objects that work. (like an "air tab") The back side of a cyliner or my rear windshild can be thought of like a wing at a high angle of attack! Airflow separation and stalling an airplane wing are the same thing. Wings can stall also because of sharp leading edges, making the airflow separate suddenly up front instead of starting from the back. This leads to abrupt and "sharp" stall characteristics.
@bjornkok2061
8 жыл бұрын
+Samm Sheperd (SNRS) so basically what you are saying that if you put these vortex generators on a car they whould reduce drag thus increasing fuel efficiency. but i wonder would this work better on hatchbacks/station-wagons that have the backend of a brick compared too the more tapered back of a sedan as you have shown?
@badassaviator5040
8 жыл бұрын
What is the name of the wind tunnel programs you use called?
@jimmaccauley
8 жыл бұрын
If you added some vortex generators to the underside of the car in line with the rear wheels would it result in a net reduction in drag from the seperation bubble without the loss of traction for the rear wheels?
@SammSheperd
8 жыл бұрын
I do have some vg's down there. But under car aerodynamics is a whole focus. This article is kinda neat www.autospeed.com/cms/article.html?&title=Modifying-UnderCar-Airflow-Part-1&A=113181
@flyer5769
8 жыл бұрын
No it wouldn't reduce drag. All you be doing is changing it from parasite to induced drag. Like he said the vortex generators caused the air to stay with the slope of the back of the car. Creating aerodynamic lift. Which causes induced drag.
@saurabhbasu86new
5 жыл бұрын
This kind of a thing is gold in the academic world, e.g. while explaining concepts to students!!
@birgerkagan6087
4 жыл бұрын
Having lectured aerodynamics and performance for 16 years at the CPL, ATPL and Instructor level I'll congratulate you on a wonderfully simple and easy-to-understand video - very nicely done
@cm6140
6 жыл бұрын
We’ll miss you
@Wrublos212
3 жыл бұрын
Sam is not with us anymore but still giving us a good lesson. Thank you, buddy :)
@salad5067
3 жыл бұрын
So sadly according to some of the comments, sam has sadly passed away rip sam
@86Timewarp
5 жыл бұрын
About to graduate with my B.S. in Aerospace Engineering: You definitely have an amazing understanding and grasp for such a complex topic for not taking any classes. Impressive!
@unclejack123
8 жыл бұрын
Two of God's greatest gifts ....Curiosity and the ability to Impart Knowledge ....... well done young Man .....................J...
@jacobshaw808
6 жыл бұрын
As an engineer who has taken formal classes and a lot of math, and as a flight instructor, all I have to say is, "Wow, you have a great understanding of fluid mechanics and have a knack for teaching. Absolutely incredible."
@theflamecoreguy7929
3 жыл бұрын
Rip samm 🙏😟
@NJFPV
3 жыл бұрын
"But then I was quickly reminded that I have no idea how to use this thing". Lol. Fantastic. Love your honesty. Just picked up a Tundra V2 and it came with VG's. I installed them and am now on my quest to see what they do and why... thanks for your video!
@NJFPV
3 жыл бұрын
Oh geeze. Just read that you passed away my dude. That sucks. I instantly liked you after watching 30 seconds of this video. Subscribing anyway, if only as a bookmark and in your memory. Rest easy my man.
@aernan
7 жыл бұрын
The visuals make it very easy to actually see the effects you are describing.
@goodnightmr5892
5 жыл бұрын
Never Forgotten Buddy! 25MAY19
@lorddaxful
8 жыл бұрын
I am currently taking a class to get my A&P license. We are told what these things are boundary layer, vortex generators, stall fences, stall etc. but we do not actually know what they are. Your videos are great man I have learned more from a few of your videos then from months of schooling to learn these things!
@SammSheperd
8 жыл бұрын
Then you also know these aren't FAA/PMA Approved :) haha. Thanks!
@snoortpod6462
5 жыл бұрын
Most interesting, indeed, if not brilliant examples of deductive reasoning.
@last1in
8 жыл бұрын
Visualizing how the world works then making connections that you can pass on is basically what a flight instructor does. You're going to be an awesome CFI
@bencesarosi7718
4 жыл бұрын
I don't know how this vid ended up in a machining playlist, but this material is top notch! I'm absolutely stunned by the loss of this great guy. Fly high!
@ashokf50
7 жыл бұрын
You have explained it much better than any other video i had seen on this subject
@barmetler
4 жыл бұрын
Man youtube recommended me this masterpiece again... What a trip for the feels Love the guy, made amazing videos.
@kenjohnson6573
5 жыл бұрын
As a retired Captain, you did an excellent job of explaining your subject matter.
@Dynamic_Flyer
3 жыл бұрын
For someone without an Aero Eng background, your explanations were good!
@kakai7640
6 жыл бұрын
friction is not same with viscosity.
@xweifuhrwfwe7265
6 жыл бұрын
Wow, this wasn't even what I was expecting, but this video actually helped me visualize a physics concept that was very briefly and poorly explained in class. Thanks a lot!
@slickfast
8 жыл бұрын
That software is awesome, I'd love to play with something like that! How much is it?
@SammSheperd
8 жыл бұрын
I got a student version for free and figured out how to use it during the week of making this video. It is pretty awesome but I've also found that there is a science to getting accurate results.
@andrewgomez6143
6 жыл бұрын
David he used Autodesk. If you want the most user friendly software to do flow visualization Id recommend Solidworks, if you want very accurate simulations try Ansys, however this takes some time to learn(at least it did for me)
@rohitsuryawanshi2229
6 жыл бұрын
Samm Sheperd which software r use? Name of software plz..
@FitXhub
2 жыл бұрын
I’m an instructor from New Zealand. This is amazing. Thank you for your work.
@danielyang263
8 жыл бұрын
I wonder that software he's using for the simulation of air flow at 0:27
@mateussousa3639
6 жыл бұрын
I think it's Autodesk Flow 🤔
@schuwi4
6 жыл бұрын
Just watch the video to the end... 4:24
@normalviewer740
3 жыл бұрын
YT recommended this and it makes me happy to hear him again. Miss you Samm
@masso172
8 жыл бұрын
Thats a VR6 huh :)
@SammSheperd
8 жыл бұрын
You know it! :)
@masso172
8 жыл бұрын
***** haha it cant be mistaken, such a great car!
@Boscovius
2 жыл бұрын
Working on an original design, amateur scratch built light sport amphibian. This knowledge will prove useful to me. Thank you.
@JimBateyPhotography
6 жыл бұрын
good video. you talk too fast.
@davidwhite8633
5 жыл бұрын
Jim Batey Agreed . I had to rewind and watch at .75 X speed .
@alemx205
7 жыл бұрын
This is probably the best video explaining vortex generator..
@ezhilmanickam3066
7 жыл бұрын
your understanding of aerodynamics is awesome than a regular aerospace engineer!
@randolphtorres4172
6 жыл бұрын
THANKSGIVING Never apologize for not being an engineer. A certificate of completion is no guarantee you understand a concept it great detail. Neither does your lack of math in any way interfere your understanding a concept. If you keep pushing to learn using your imagination and curiosity you will eventually understand the concept better than many engineers. Keep up the good work and pledge your allegiance to only one nation your IMAGINATION.
@joshuaskimore
4 жыл бұрын
If you work on aircraft. Vortex generators can cut you up bad if you accidently land on one. Always good to practice good safety. On the topic of the video. I'm glad KZitem finally recommended something good for once. Love the video!!
@SangheiliSpecOp
6 жыл бұрын
I had to comment on this video because I have been doing a lot of research on vortex generators and other aerodynamic parts for automotive applications. You seemed to effortlessly turn what could be a complicated subject into something anyone could understand with everyday examples added in the video and clear visuals. Thank you!
@swedenpaul11
6 жыл бұрын
I like that you mentioned your sources at the end, that's something that too many KZitem Channel's forget about
@s.lacasse8337
4 жыл бұрын
I like how it's fast & educating! Well done!
@davidwootton683
5 жыл бұрын
This is one of the best explanations I have ever come across. Many thanks and greetings from Africa.
@rafiqida
4 жыл бұрын
This is the first video i watched on this channel, but to know that he passed away, RIP
@TrustmeImanengineer.
3 жыл бұрын
simple and brief explanation given in short time with real examples great
@quantomic1106
8 жыл бұрын
I've learned more about boundary layers here in 5min than from a 500 page book of aerodynamics. Thanks! Happy flying!
@ktsenya2
6 жыл бұрын
I applaud your dedication to the pursuit of truth and knowledge
@1021connie
7 жыл бұрын
Much better description and video than another youtuber here who is an aerospace engineer, with applied interest to race aerodynamics. Props to you
@Jonasz314
6 жыл бұрын
for a guy with "limited understanding", you're doing quite terrific. I have a degree in aerospace and everything you said is correct. VG's are what I want to use on my racecar, but I need to collect data. You mentioned that VGs on a car cause lift on the rear axle, it's true for a street car but if you have a rear wing, it causes the air flowing over the wing to be attached and thus, vastly improves downforce. So VGs on racecars should be highly beneficial. The thing to worry about however when adding downforce to the rear of the car is to add as much in the front, and there's much less you can do there, since regulations typically limit the size of the front splitter you can use.
@trevorrotchell2524
4 жыл бұрын
I just used this to show my 12 yr old what we mean when e talk about air flow separation boundary etc. your video is great!
@sameerallset
8 жыл бұрын
I now understood properly by this video importance of vortex generator on aircraft, thanks men.
@mr_wenzday
6 жыл бұрын
That was pretty interesting. And visually satisfying to compliment your explanation.
@ckusel123
7 жыл бұрын
Great video! Just remember that just because you helped flow stay attached better doesn't mean a net reduction in drag! Pressure drag may be reduced but there is added pressure and viscous drag from the vortex generators and the now attached flow causes more viscous drag as well. Whether or not it is a net benefit, well that depends on the application.
@jameshazelton4612
5 жыл бұрын
I’m like you, trying to understand and visualise to see what makes things do what they do! Great video and explanation of boundary layers and how VG’s work. Excellent video!
@domothepilot
6 жыл бұрын
aerospace engineer here. wonderful explanation! great visuals! good job!
@NecumNaTo
6 жыл бұрын
This is one of the most well-explained and time-efficient video of 2017. Keep up the great work man
@100nec5
6 жыл бұрын
A přece čumim ;)
@zlaya84
6 жыл бұрын
Subscribed! And printing vortex generators for my slow flyer post lunch. The rear car window shot sold me.
@johncappelletti3332
5 жыл бұрын
YOURE AWESOME! really enjoyed the video, I had a CFD class in college and it was nice to see those streamlines and test drives/flights
@rxxxxrx7748
5 жыл бұрын
He passed away my dear, look at his final video uploaded by his dad
@iainbradford4254
6 жыл бұрын
You did a great job. You obviously have a massive amount of curiosity and enthusiasm.
@robertgantry2118
6 жыл бұрын
You did a really good job explaining the vortex generators. That's what I came here for. Thanks.
@rinsignares
6 жыл бұрын
I am an engineer and everything you said is right on! The video is quite good to visualize vortex generators
@mustang5227
3 жыл бұрын
Hi ! I am curently studying at ISAE SUPAERO in france which is an aeronautic and aerospace ingeneering school. Your video explains really efficiently the concept of boundary layer and the effect the vortex actually has with a lot of images, something that is clearly missing in our classes. Good job !!
@balajisriram6363
5 жыл бұрын
such a beautiful video. Thanks a lot
@technodrone313
7 жыл бұрын
got a 3d printer and 3d scanner about 9 months back. been teaching myself some design/engineering and been having a blast in the process.
@marsstepper
7 жыл бұрын
fun. all the info was interesting and loved all the diagrams. what I loved even more is than you said your skill in the topic. too many people on KZitem don't want to admit it, but its greatly appreciated. GL with your future project.
@sevenhornets
5 жыл бұрын
This is literally the same excersize we went through in E&F flight test in the late 90's. I was cracking up to see "tufts" as we called them on your various surfaces. We used VG's, tripper strips, fences, fingers, gloves, pourous doors, and so on.
@ElColombiano1999
5 жыл бұрын
This video was absolutely amazing, I'm currently taking Fundamentals of Aerodynamics at university and this video has basically summed up the semester in less than five minutes. I'm definitely going to watch this again to review for finals!
@omarselim6281
5 жыл бұрын
Brilliant video! Subscribed. I think you understand more about this than many aerospace engineering students!
@icebox1145
5 жыл бұрын
to late, he dead.
@DrDobbe
5 жыл бұрын
Impressive! Nice work!!
@nw7696
5 жыл бұрын
Credit should always be given to those who "do" opposed to those who live in the box of the tried and true. Nice work!
@astasna
5 жыл бұрын
The video you made is a great technical support !
@wuzhattenin
5 жыл бұрын
better than my fluids professors... thanks for being a good teacher
@drcdan42
3 жыл бұрын
Samm, you left the world a better place by being here.
@Vinzmannn
5 жыл бұрын
That explanation was awesome. Best I've ever encountered.
@hotrodray6802
4 жыл бұрын
👍👍👍 Hey, the airplane builders/ experimenters of 90 yrs ago were doing it just like you. Analytical and pragmatic. No computers. Just their minds and eyes.👍👍👍
@paulmckenzie6008
8 жыл бұрын
I can't remember how I stumbled on to your channel, but I'm glad I did!
@SammSheperd
8 жыл бұрын
Thanks so much Paul!
@romanistadoc811
2 жыл бұрын
Great explanation for Vortex generators
@grim-upnorth
8 жыл бұрын
Really interesting, and pitched at just the right level for non-geniuses to understand. Thank you.
@SammSheperd
8 жыл бұрын
That level is also the one I operate at lol. I like to try and pick through the math and find out the interesting conceptual parts of how things work. There is a lot of this stuff taught to engineers that other people would find fascinating if it wasn't taught exclusively to people who have math experience past Calc 4
@grim-upnorth
8 жыл бұрын
+Samm Sheperd (SNRS) Well I've just subbed and am slowly going through the rest of your videos. Looking forward to the next one. Thanks.
Пікірлер: 1,1 М.