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/sci/ - Science & Math

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10136537 No.10136537 [Reply] [Original]

Why does this misconception exist?

>> No.10136542
File: 140 KB, 485x445, 1535416324525.jpg [View same] [iqdb] [saucenao] [google]
10136542

>>10136537
Is that not an acceptable explanation of lift? Pls help a brainlet understand.

>> No.10136546

>>10136542
It is. Read about the Magnus effect and Kutta-Joukowski.

>> No.10136551

>>10136542
Yeah, lift is generated by breaking flow geometry. Have a look at what >>10136546 said and also look at Joukowski transforms

>> No.10136567
File: 58 KB, 645x729, 1538430312178.png [View same] [iqdb] [saucenao] [google]
10136567

>>10136546
Wait, wait you really fucking believe OP's pic?

>> No.10136583

The wings make the air go down so the plane goes up. You can easily make something fly with flat wings if you just have them angled down.

>> No.10136665

>>10136537
https://en.wikipedia.org/wiki/Lift_(force)#A_more_comprehensive_physical_explanation

>> No.10136688

>>10136537
navier-stokes theory thread. wow.

whether or not the theory is incalculable, planes work. i know; i've been on 50+ flights in my life, and they work. QED, /thred

>> No.10136705
File: 94 KB, 1290x810, custer wing.jpg [View same] [iqdb] [saucenao] [google]
10136705

>>10136537
Problem?

>> No.10136743
File: 153 KB, 1024x683, TRINITY___Forever.jpg [View same] [iqdb] [saucenao] [google]
10136743

>>10136583
This is correct. The angle of attack of the wing forces air to move down and conservation of momentum gives the plane lift.

>>10136537
>Why does this misconception exist?
People think that the same two elements of air that separate at the front edge of the wing have to come back together at the trailing edge; this is the principle through which they demonstrate the rarefaction of the air fluid. This is not right. This error comes from viewing the laminar surface of the wing as a closed system and ignoring all the rest of the air in the atmosphere that can get between the elements that separate at the front before they recombine perfectly at the back. Also, even if you don't require the two elements to separate then miraculously recombine, it isn't suction that generates lift. It's the conservation of momentum when air is shunted down by the angle of attack of the wing.