In article ,
"Morgans" wrote:

"Alan Baker" wrote

Air pressure from inside the wing pushing up on it more than the air
above is pushing down...

I hope you are pulling someone's leg, and that your are not that inept in
the field of aerodynamics and physics.

No, I'm quite serious.

The reduction in *pressure* on the upper surface of the wing cannot
produce any force except downward. A perfect vacuum over the entire
upper surface wouldn't produce any upward force, but simply *zero*
force; allowing the upward force on the lower surface to act alone.

Anyone who thinks that the pressure of a fluid on a surface can act in
any direction but towards the surface is simply wrong.

--
Alan Baker
Vancouver, British Columbia
http://gallery.me.com/alangbaker/100008/DSCF0162/web.jpg