Ron,

Being a pilot myself and a mechanical engineer who endured hours of fluid dynamics I shold probably clarify my earlier post on lift.

Most people believe and are told (even many fluids books say the same) that Bernoulli's principle is what create lift on an airplane wing. Bernoulli's principle is only effective in closed areas like a pipe. It is true that the faster moving air over the "leeward" side of the wing is lower in pressure than the "windward" side, but this pressure difference cannot account for anywhere near enough force to lift a plane off the ground. The majority of the force that lifts a plane off the ground is due to Newton's 3rd law. When you force the air downward you need your opposite force to be upward. Flying in ground effect is a prime example of the downward flow of the air. So, it is a combination of both principles but Newton's law dominates.

I need to go to my home computer where I have a link that describes this in more detail than anyone here will care to read. I will post it over the weekend.

To back up my statements I have done experements in wind tunnels where I measured the pressure differential between the top and bottom of a section of wing from a C172 and calculated the lifting force on pressure alone. If that were the only lifting force a wing generated you will go off the end of the runway.