ORIGINAL: mboland
Or are you just tired?
What exactly were you trying to get going with this topic?
'Why do people say the top of the wing causes the plane to fly?' umm .... maybe cause it does, ever tried one without a top?
but then you could argue that it is the movement of the wing through the air, and so on, and so on.
I think the subject is called Aerodynamics
so you are saying that a plane with perfectly flat wings or perfectly symetrical wings wont fly?
remember now, if it's a symetrical airfoil, the bottom would cancel out the top of the wing if this theory was true about vacuum causing lift.
and yes, I have tried flying without the top of a wing before.
Great Planes Trainer 40. I removed the entire top monocote and flew it with just the bottom monocote in place.