"Mark Oliver" wrote in message ...
The current theory of flight is based upon the Bernoulli's Principal, the
pressure of a fluid (liquid or gas) decreases at points where the speed of
the fluid increases. The airfoil is designed to increase the velocity of
the airflow above its surface, thereby decreasing pressure above the
airfoil. Simultaneously, the impact of the air on the lower surface of the
airfoil increases the pressure below. This combination of pressure decrease
above and increase below produces lift. Pressure is reduced due to the
smaller space the air has above the wing than below. Air cannot go through
the wing, so it must push around it. The surface air molecules push between
the wing and outer layers of air. Due to the bump of the airfoil, the space
is smaller and the molecules must go faster.

Hey, don't mess with the mechanics of flight. My airplane was built in
1966 and I don't want to have to buy a new one.
--
Gene Seibel
Hangar 131 - http://pad39a.com/gene/plane.html
Because I fly, I envy no one.