How do airplanes fly? It's not magic. Learn about the forces that help (and hinder) airplane flight. License: Creative Commons BY-NC-SA More information at k12videos.mit.e...
Пікірлер: 152
@PuffDaddyReef10 жыл бұрын
Awesome Video! I watched it with my fish.
@ethangorodetsky60494 жыл бұрын
Are you lonley
@rsxzy4 жыл бұрын
it do be dead now
@ethangorodetsky60494 жыл бұрын
@@rsxzy oof
@rsxzy4 жыл бұрын
@@ethangorodetsky6049 💀🤷♀️
@kiwi7873 жыл бұрын
@@rsxzy hhhhhhh
@lovehearts4503 жыл бұрын
Thank you so much for simplifying this concept. I've been stuck so long but no longer. You're a life saver!
@elliotjones437910 жыл бұрын
This helped me a lot, defiantly getting saved to favourites!
@MITK12Videos11 жыл бұрын
Good question, COOLMAN0125. In this video, our equations are solving for the lift per unit wing area and drag per unit wing area. Those are what we call those "L" and "D." These are both in units of N/m^2. If you wanted to calculate the absolute lift or drag for an airplane, then you'd need to know the surface area. The equations then become: L' = 1/2 * rho * C_L * S * v^2 and D' = 1/2 * rho * C_L * S * v^2 (answer continued below)
@mohamedalasnag899610 жыл бұрын
So simple and to the point ... great job guys .. keep it coming :)
@jacoballgaier215110 жыл бұрын
Where did you get that model of the airplane
@md83ar10 жыл бұрын
The aircraft model it appears at the beginning of the video is a Boeing 777 (cough, cough).
@Mudux10 жыл бұрын
wow, you can read, that's impressive
@md83ar10 жыл бұрын
Yeah, I've nothing with the 777. I find it to be a very beautiful aircraft together with the 787, as well as you. But with regards to the exterior design, I prefer the 747-400 rather than the 747-8i, although I suppose the latter is more fuel-efficient.
@simplysimulation65704 жыл бұрын
@@md83ar a320 gang sorry i know im 5 years late
@MITK12Videos11 жыл бұрын
(answer continued) where S is the surface area of the wings. In these equations, L' and D' have the units of N. Relating these equations to the ones in the video, we have that L = L' / S and D = D' / S. L' and D'.
@magreyfarhan71224 жыл бұрын
The awesome part was about the propeller..."yeah that little guy" 🤣.. Thanks for such an awesome video
@adrianchivas201410 жыл бұрын
MIT is awesome...
@jaakko13212 жыл бұрын
I study Structural Engineering and it's completely pointless using that value of g for the shear purpose of explaining the fundamentals of Aerodynamics to those who are just interested in knowing how a plane flies. It's not a lecture teaching students , including such details would just confuse the interested viewer and be a complete waste of time. I found the video fantastic and found the jokes great. Especially the disappointed astronaut ;) Well done guys!
@reinyeradoriuq27334 жыл бұрын
Things to take note here. Angle of attack is not the angle between the horizontal plane (wind direction) and the nose but rather the angle between the horizontal plane (wind direction) and the chord of the wing itself.
@ChrisZoomER3 жыл бұрын
I like how the airplane model you used was of a 777-300ER.
@chrismachabee31286 жыл бұрын
Brilliant. absolutely genius. I knew nothing when I watched and now I understand everything. brilliant. Thank you. Seriously.
@bgnyc111 жыл бұрын
in math there are times where it is actually really helpful to talk about approximations, like when discussing Pi and the hypotenuse of a right angle with 2 sides of 1. But this is not such a case.
@vaikunthdempo461010 жыл бұрын
Awesome one guys.. keep it up :D
@JosephDowski10 жыл бұрын
Thanks for the great vid ! Perfect for my daughter's science project. :)
@chicagolandable5 жыл бұрын
Big thumbs up for this video...well laid out...use of humor helps immensely....and being thoughtful enough not to include background music which is pretty much always an attention breaker.... KEEP MAKING MORE VIDEOS LIKE THIS👌👌👌👍👍👍
@itsikcarmona9845 Жыл бұрын
Flat Earth science makes the airplane flying . Hahah.
@ilkeyigiter7 ай бұрын
Thanks for the video. It was nostalgically hilarious and thought me a lot :)
@hunterfagan62726 жыл бұрын
The angle of attack is actually the angle of the chord line and relative wind
@HDDigi10 жыл бұрын
Really awesome!
@ft60245 жыл бұрын
Love this explanation. Thanks guys!!! Do you have any other aviation material?
@camilahelenferreira84097 жыл бұрын
Hello. I just did a translation of this subtitle from english to portuguese.... Could you please authorize it to publication?
@Kuwaiti199011 жыл бұрын
the angle of attack is based on the chord line of the wing relative to the wind not the aircraft nose.
@TheGuywithnolife10 жыл бұрын
You guys are funny
@coconuts62312 жыл бұрын
Actually in America, its typically referred to as "Airplane" keep in mind that different countries have different standards that are taught by schools.
@berndklumpp779010 жыл бұрын
cool stuff, like!
@andreizadasilvapereira53122 жыл бұрын
0:11 Boeing 777-300ER 1:200 scale mockup
@bernaferrari11 жыл бұрын
the sound quality is very bad. Too much noisy, but the video is amazing
@Observ45er8 жыл бұрын
You got the angle of attack wrong. It is to the wing, not the nose. There is a difference due to the angle of incidence of the wing to the fuselage..
@michael.110111 жыл бұрын
really cool way of explaining :)
@NH-en6et9 жыл бұрын
Awesome video! I like that you guys explain the equation for lift and drag. Thanks a bunch! I created a wooden glider for physics and needed some information for my written report. You guys helped!
@evilzkun82848 жыл бұрын
L=(1/2)*(rho)*(V^2)*(Cl)*S S or Surafce Area is missing in the video
@mjada767 жыл бұрын
Surface area changes with the angle of attack as was explained in the video.
@StrsAmbrg5 жыл бұрын
That should have to be explained that the surface area wide is changed depend on situation: (when take off or landing).
@AchiragChiragg5 жыл бұрын
He did mention magnitude of lift "per unit area"
@AmbientMorality4 жыл бұрын
@@mjada76 surface area does not change with angle of attack
@VelhaGuardaTricolor5 жыл бұрын
1:40 has nothing to do with SIZE but MASS and NO they are not the same thing due to different densities. For instance, a planet the size of the Moon but made out of LEAD would have a way bigger gravitational pull than JUPITER Capice?
@DarkCeremony11 жыл бұрын
What about induced drag? Why is induced drag (1/2)* rho * S * v^2 *(C_L^2/(pi* aspect_ratio)) not included?
@Doriesep66227 ай бұрын
So the laws of aerodynamics are not just flimsy superstitions. There is a method to all. It is figurable-outable. What happens to a plane in the air is not willy nilly. Thank you. English teacher here.
@zayedalsuwaidi76978 жыл бұрын
Is Weight the correct term or is it gravity?
@haiya1234567898 жыл бұрын
it's weight don't ask me how
@zayedalsuwaidi76978 жыл бұрын
Que Naim thanks m8
@mjada767 жыл бұрын
Don't qoute me here, but the only thing I could think of is that weight which is the sum of mass X gravity being used because it affects thrust and lift. Another thing the airplane is not in free fall so other forces will have to be taken into consideration.
@raahimhadi49056 жыл бұрын
It's MIT. Don't question it.
@AmbientMorality4 жыл бұрын
@@zayedalsuwaidi7697 Weight is the force due to gravity
@robertmarks65252 жыл бұрын
thank you sir 👍
@yourmeede11 жыл бұрын
the handclap killed me lmfao
@MAMotinSobujsobuj239 жыл бұрын
Tanks a lot. I got the real idea about the aircraft flying.
@How11059 жыл бұрын
I'd love a model of the 787!!
@How11059 жыл бұрын
***** Sorry, spelling mistake. I hit 8 by accident.
@michaeladi88478 жыл бұрын
+GlitchedGaming 1087 it's a 777-300ER though
@ReadingThis111 жыл бұрын
interesting info... facts..... explained well....
@MrRaT3D1010 жыл бұрын
How do these big object take off tho?
@puffcatco6 жыл бұрын
science but its very easy. wings and rotor makes it goes up
@COOLMAN012511 жыл бұрын
What about the surface area of the wing? Shouldn't it be in formula?
@OT7_Tae Жыл бұрын
What forces are equal when the airplane is on rest?
@royalfuzion94268 жыл бұрын
I know stall its when your plane drops speed and height right?
@NikkexD11 жыл бұрын
Really good stuff
@TheBeetrootman11 жыл бұрын
Well I Learn a few things. Mainly just the roe thing.
@parkerdial8 жыл бұрын
Really good and funny!
@emelyhernandez65716 жыл бұрын
I need to cite this but I don't see any information on it
@selenalamothe9978 жыл бұрын
making learning funny, thank you!!
@sunku2608 жыл бұрын
thanks a lot
@thehunter32908 жыл бұрын
This helped me with my homework
@leonardozhou78443 жыл бұрын
1:16 from the center of the object
@AnDPineapple7 жыл бұрын
this made me giggle. great video :)
@SanthoshKumar-bm9kh8 жыл бұрын
are the forces equal in magnitude and opposite in direction ?
@alialwani24138 жыл бұрын
offcourse not if they were then the airplane will be in equilibrium and it will not move neither vertically nor horizontally
@AmbientMorality4 жыл бұрын
@@alialwani2413 False, in steady level unaccelerated flight (like cruising) the forces are in equilibrium. Velocity doesn't matter; if the acceleration is zero then the forces must be
@rahj13659 жыл бұрын
Good Job!
@dalyinnz9 жыл бұрын
Nice Video Folks - well done!
@Yeiyn34311 жыл бұрын
Great video! :)
@concorde943311 жыл бұрын
I agree
@bruno13almeida12 жыл бұрын
Nice! now I'll build one airplane hahah thanks so much!
@xXEpicMehXx11 жыл бұрын
I remember getting a model 777-200 when I was 6. Broke it instantly and had to mess it up by plopping glue all over it. Yay.
@FedericonpFer11 жыл бұрын
nice..
@yulianussituru487211 жыл бұрын
I want those B777 miniature..
@paul1964uk12 жыл бұрын
0:12 No, it's an "aeroplane". We could agree to call it an aircraft though.
@aayushsachdev53527 күн бұрын
Nice
@appletree84418 жыл бұрын
left to right with the plane model would have looked better, and worked better with the graphs. next... float,flutter, fly, glide, fall.
@muratkar87538 жыл бұрын
what happened to areas in formulas ?
@jadenbezzel2129 жыл бұрын
Is that 1:200 or 1:400 that hogan 777-200
@BenLewisE12 жыл бұрын
Sorry, I guess I was being very picky. I still think though that he should have pointed out that it was an approximation...
@swilsonmc28 жыл бұрын
has anyone ever seen a video of an astronaut jumping really high on the moon? 1/6 gravity should mean 6x higher, right?
@AchiragChiragg5 жыл бұрын
It's not that straight forward.
@Hugh.Manatee11 жыл бұрын
Only on your side of the pond mate! ;)
@SpeedyWinds10 жыл бұрын
This ROCK!
@jhonatanmduarte11 жыл бұрын
Fantástico!
@chiliogpepperoni10 жыл бұрын
Dat astronaut though.
@2755_Ishycakes11 жыл бұрын
Wouldn't D' = 1/2 * rho * C_L * S * v^2 be calculated with coefficient of drag (C_D), though, and not C_L? Not entirely sure, because I guess lift can have an impact on drag (induced drag) etc...
@MrShapronForU9 жыл бұрын
cool vid :D
@manivannan20209 жыл бұрын
Gg hello
@Hugh.Manatee11 жыл бұрын
You do realise the force of gravity is not equal on all points of the earth right? The fact that the earth is not a sphere, but an oblong alone creates of variance of .5% between the poles and the equator. Your number 9.81 holds true on most places on the earth surface, whereas 9.80665... I'm guessing you got that number from an experiment you did for school? Try the same experiment on a ship in the middle of the Atlantic around the equator and you'll get a completely different number.
@mossmoss20195 жыл бұрын
ypu got me at the fairy one. subscirbed!
@BenLewisE12 жыл бұрын
@MITK12Videos This is not good. You say things that are wrong without even explaining you inaccuracies or simplifications. g does not equal 9.81, standard gravity is 9.80665, but even this is an approximation. The forces themselves are simplifications since there are many hundreds of different forces acting on different parts of the plane, but again, these work out to leave us with what you described... (I am studying AS in the UK atm, but was interested to see what you were making :P )
@Henoik11 жыл бұрын
"So this is an airplane here"... Cool. Why didn't you mention it was a B777? I saw it at once.
@chiliogpepperoni10 жыл бұрын
Wow, you knew the whole time it was science but didn't tell the elves and wizards working hard all day, risking their lives just to carry another plane to it's destination. Lots of lives were lost. Both elves and wizards, and even humans, and they took the blame.
@latropajaleosa11 жыл бұрын
see veritasium's explanation, it complements this one a bit. Still not perfect
@avia30896 жыл бұрын
is not pressure drag is parasite drag
@SuperVada Жыл бұрын
In other words, Homelander couldn't save them
@techkiller242 жыл бұрын
Our teacher showed this in our class
@gary12xxx11 жыл бұрын
haha those scientists, they look so happy.
@mlccrl8 жыл бұрын
When explaining why planes fly please don't forget the necessity of a pilot. No pilot no fly. (questa battuta del c..o dovrebbe far sbellicare gli americani)
@David-du3si7 жыл бұрын
true lol
@MrVeenty12 жыл бұрын
science = cool magic
@sameersameerulla14603 жыл бұрын
I Airplane drawing
@latropajaleosa11 жыл бұрын
... it still does not explain why airplanes fly.... so it left us waiting for the important part... still a good try.
@thomasgandalf41118 жыл бұрын
actually it's physics or law of nature, last time I checked
@thadream_13_109 жыл бұрын
who does theses videos
@shivshankarpe9 жыл бұрын
ThaRunna3D Its some sort of a collaboration between MIT and Khan Academy. Or, that's what I think based on this video: watch?v=VA273i3z7Mk.
@pilot00194511 жыл бұрын
Wrong expl. angle of attack
@andreaslazarou48219 жыл бұрын
Hey. Its good!!!!¿
@Observ45er9 жыл бұрын
Goofy video from MIT. Not what you'd expect......Dissaperium Leviosa !