There is a beauty in the simplicity, yet depth of this presentation. This is something that gets lost in today's presentations. Thank you for loading this video on UA-cam!!!
migkillerphantom That’s because the military depends upon your proficiency and understanding as a matter of life and death. A college simply needs to take your money in order to survive.
What idiotic comments, as someone taking an aerodynamics course I can tell you that this video pretty much covers what you go over on day 1, and we do it with a hell of a lot more math so you can actually calculate lift and drag coefficients given a pressure distribution.
4.05 That’s not the cord line of a flat bottom or Clark Y airfoil when I was learning. The line starts from the first point on the leading edge curve (where air separates above and below) and through to the trailing edge.
Are we studying nearly a 60 year old subject? I thought Airfoils are a new thing when I first heard of them. Ultimately there are lots of things to learn always. Great video
Since wings are fixed in position on most aircraft, & the wing creates lift perpendicular to the length of the aircraft, it would seem to be impossible to attain a true vertical dive if the fuselage is truly vertical. The lift from the wings would move the plane horizontally. To achieve a true vertical dive, the plane must exceed an angle beyond vertical to put the wing into zero lift in both directions. Is this correct?
Correct, unless the wings are symmetric with an angle of incidence of zero (meaning they generate no lift at zero angle of attack and the wings are not at an angle relative to the plane)
At 25:32 , saying "in pulling out of the dive" I would be so glad if he also explained the role of the elevators and flaps. I wonder how he would explain that. (I know the explanation btw.) It is such an amazing video for that time considering the tools they had. Thanks for uploading.
At 20:09 i still could't understand that the negative pressure on the upper surface is creating powerful lift force as he said. How the negative pressure is creating lift? Anybody here to explain please?
It would help if you had a background in dynamics and calculus. But I'll try. Basically pressure is just force over area right? So in still air the air pushes on the surface of the wing with a certain amount of force per square cm. If you add up all the forces with their directions you find that the total force is zero, all the air pressing on the bottom of the wing matches all the air pressing on the top of the wing. Now if you move the wing through the air you develope a low pressure region on the top of the wing. Now if you add up all the force you find that the air is pushing on the bottom of the wing with a larger force than the air pushing on the top of the wing, this force inbalance is essentially the lift being generated by the wing.
Simple, air pressure caused by atoms of air striking all surfaces, once accelerated over the upper curve, the atoms strike with glancing blow, reducing the pressure. Underneath they bunch up, getting in each others way, so pressure rises, due to more atoms striking.
It is true unless you have a fully symmetrical airfoil. As a side note, lift is created perpendicular to the relative wind, however, with a fully symmetrical airfoil zero angle of attack equals zero lift.
Considering it was made ion 1941, I have not come across any modern day better or equivalent informative video as this 1941 film, and indeed the sound quality is excellent for that era, and this must have been one of the best educational and training film so far, I have not come across any modern day version as beautiful as it has been presented here, modern versions seem to emphasize too much into boring stuff of formulas, Write Brothers did not use any formulas in their first flight, and that stuff is real boring, as no matter what, what does formulas do? can't even find where flight MH317 has gone, so much for modern technology!
As a kid and also when I entered the military, I sat through hundreds of hours of these films. Gad, they were exhaustively boring. This featureless monotone voice seemed to be in every one of them and if your class was just after lunch, there was no way to keep your eyes open. That voice was like a hypnotist - you just mentally could not resist it. What was worse, in one class, my teacher had droopy eyelid syndrome and his lectures after the film would instantly knock us all out. He never said a word about it, just kept right on droning on and on...
There is a beauty in the simplicity, yet depth of this presentation. This is something that gets lost in today's presentations. Thank you for loading this video on UA-cam!!!
old timey us military education videos teach you in 5 minutes what a college class fails to do in months
migkillerphantom That’s because the military depends upon your proficiency and understanding as a matter of life and death. A college simply needs to take your money in order to survive.
Thats because colleges don't educate anymore...They indoctrinate.
@@TheTmshuman Well, they also teach you to hate your own ancestors and love communism...
What idiotic comments, as someone taking an aerodynamics course I can tell you that this video pretty much covers what you go over on day 1, and we do it with a hell of a lot more math so you can actually calculate lift and drag coefficients given a pressure distribution.
Yes. But not in an understandable way. Post the video or link or get off tge pot
I love these old shows , thanks
Nobody can explain you better than an old video..
they worked for the country ...now people work for money...
4.05 That’s not the cord line of a flat bottom or Clark Y airfoil when I was learning. The line starts from the first point on the leading edge curve (where air separates above and below) and through to the trailing edge.
I felt like going back in time, but I liked it. Thanks.
Are we studying nearly a 60 year old subject? I thought Airfoils are a new thing when I first heard of them. Ultimately there are lots of things to learn always. Great video
The chord is always a line through the leading edge to trailing edge and not as shown at 4.01 on the clark y type airfoil.
I’m legit watching this the day before a test wish me luck
And how you did in your test?
Superb training video.
Why can I never find any modern no-nonsense educational videos such as this?
Priceless Video...Thank You!
thanks for uploading
bilgilendirici bir video
Since wings are fixed in position on most aircraft, & the wing creates lift perpendicular to the length of the aircraft, it would seem to be impossible to attain a true vertical dive if the fuselage is truly vertical. The lift from the wings would move the plane horizontally. To achieve a true vertical dive, the plane must exceed an angle beyond vertical to put the wing into zero lift in both directions. Is this correct?
Correct, unless the wings are symmetric with an angle of incidence of zero (meaning they generate no lift at zero angle of attack and the wings are not at an angle relative to the plane)
Can there be a relative wind lift with a three tier air foil? Just thinking and learning. Ty
i like this video it is best video for bigners
Wow amazing to see engineering marvel.
old is gold ❤
Thank you, very much.
At 25:32 , saying "in pulling out of the dive" I would be so glad if he also explained the role of the elevators and flaps. I wonder how he would explain that. (I know the explanation btw.) It is such an amazing video for that time considering the tools they had. Thanks for uploading.
Knowledgible one...:)
Von Karman himself would have been happy to teach this to his kids.
At 20:09 i still could't understand that the negative pressure on the upper surface is creating powerful lift force as he said. How the negative pressure is creating lift? Anybody here to explain please?
It would help if you had a background in dynamics and calculus. But I'll try.
Basically pressure is just force over area right? So in still air the air pushes on the surface of the wing with a certain amount of force per square cm. If you add up all the forces with their directions you find that the total force is zero, all the air pressing on the bottom of the wing matches all the air pressing on the top of the wing.
Now if you move the wing through the air you develope a low pressure region on the top of the wing. Now if you add up all the force you find that the air is pushing on the bottom of the wing with a larger force than the air pushing on the top of the wing, this force inbalance is essentially the lift being generated by the wing.
Simple, air pressure caused by atoms of air striking all surfaces, once accelerated over the upper curve, the atoms strike with glancing blow, reducing the pressure. Underneath they bunch up, getting in each others way, so pressure rises, due to more atoms striking.
nice animations tho ;)
It is true unless you have a fully symmetrical airfoil. As a side note, lift is created perpendicular to the relative wind, however, with a fully symmetrical airfoil zero angle of attack equals zero lift.
AH YES !
this is how we learned in the good old dazeeee , , ,
( but hey ~ it worked )
the aoa can be larger than 90° :D
Imagine the plane is on a tailslide...
The DOD in 1957, or the War Department in 1941?
In short
"Old is gold"
LPT ..increase video speed to 1.25
I just broke wind
yes! :D
Already subscribed. But Vsauce is succinct facts, not really in-depth per say
coz u have to look for university lectures that noone does
Links?
Because education is DEvolving.
🌿
Vsauce
@leaualorin What the hell is wrong with you dude ? It is just a video for engineers.
14:17
18:14
Распределение давления с 20:00 - полное вранье!
Это видео еще раз доказывает, что теоретическая аэродинамика - это лженаука.
like at 1:36 in watch?v=yyyXcBv2yzM
lolz
Poor sound quality. Amazingly boring delivery.
Considering it was made ion 1941, I have not come across any modern day better or equivalent informative video as this 1941 film, and indeed the sound quality is excellent for that era, and this must have been one of the best educational and training film so far, I have not come across any modern day version as beautiful as it has been presented here, modern versions seem to emphasize too much into boring stuff of formulas, Write Brothers did not use any formulas in their first flight, and that stuff is real boring, as no matter what, what does formulas do? can't even find where flight MH317 has gone, so much for modern technology!
As a kid and also when I entered the military, I sat through hundreds of hours of these films. Gad, they were exhaustively boring. This featureless monotone voice seemed to be in every one of them and if your class was just after lunch, there was no way to keep your eyes open. That voice was like a hypnotist - you just mentally could not resist it. What was worse, in one class, my teacher had droopy eyelid syndrome and his lectures after the film would instantly knock us all out. He never said a word about it, just kept right on droning on and on...
Formulas should not be introduced first. Only when it vecomes relevant when one is going to design on or calculate something. For a real purpose
The problem is that the stuff is not immediately relevant. Source of the problem is that education is not self guided