RE: Why do people say the top of the wing causes the plane to fly?
Ok sport
how about this:
lift occurs ANYTIME there is a pressure difference- between bottom surface and upper surface .
the shape means NADA
The lift is simply a result of mother nature trying to equalize pressure.
Or my third rule of aerodynamics which states : lift is drag and drag is lift .
You can't have one without the other .
anytime lift occurs , thre is an unbalance in air pressure - and drag. If you could get lift without drag - you would zip off to the moon.