An airplane is held up by the wing having an angle onto the oncoming air, thus planing it. If wings needed to be aerofoil, flat shape wings would now work but yet they do.Yes but that is up for debate whether a plane utilises the low pressure high pressure principle of boomerangs or the magnus effect, or whether a aeroplane simply planes the air, creating the pressure beneath the wing. Me personally believe the 2nd.As you increase the angle of attack, the pressure below the wing obviously increases until α = 90°. But as shown in the video clip, when α > 15° or thereabouts, the flow over the upper surface becomes turbulent and, er, the lift decreases sharply, producing a stall condition.
Only an idiot, an aerodynamicist or a qualified flying instructor would conclude that this implies that the airflow over the upper surface contributes significantly to lift. A born genius like yourself knows that airplanes are held up by faith, magic, and the underside of the wing.
Thousands of fools all over the world are busy right now removing dew, frost or insects from the upper surfaces, and designing ever more "efficient" curves that clearly contribute nothing to controlled flight. O we of little faith!
The stall demonstrated is the leaking of air from beneath the wing to the top of the wing which creates destructive turbulence, due to the angle and trim that is required upside down and the lack of thrust capability that is required to summount this turbulence that most planes exhibit, this is why the planes have a bit of trouble flying upside down.
They also remove rivets from wings, as well as barn doors and gremlins as the efficiency tends to drop.