News for hackers. Stuff that matters.

A comment on A Physical Description of Flight, Revisited (2009) [pdf]. Parent comment

Re:A Physical Description of Flight, Revisited (2009) [pdf] by WalterBright on Friday October 28, 2016 @02:38AM (#12813606)
The lift is the sum of all the pressure vectors around every point on the wing. Since the pressure vectors are all normal to the wing surface, in order to have a net upwards vector, the pressure on the bottom surface has to be higher than that on the top.

I.e. air cannot "pull" anything anywhere.

[ Parent | on HN ]
Re:A Physical Description of Flight, Revisited (2009) [pdf] by renox on Friday October 28, 2016 @09:19AM (#12815433)
If I remember well: in normal condition the lift come 2/3 from the top of the wing and 1/3 from the bottom of wing.

So the depression above the wing is indeed "pulling up" the wing more than the surpression below the wing is pushing up the wing.

[ Parent | on HN ]
Re:A Physical Description of Flight, Revisited (2009) [pdf] by WalterBright on Friday October 28, 2016 @07:05PM (#12821527)
No, a vacuum never "pulls". The pressure on the other side of the object pushes it.
[ Parent | on HN ]