I understand what you are getting at here i.e. downwash due to angle of attach, but hear me out. Correct me if I'm wrong (and I very well could be), but for there to be an increase in pressure under your hand the air would need to be accererated to, say, 65 mph. I claim that the air under your hand is, maybe, 58 mph and the air over your hand has decelerated to, say, 50 mph. So, the major effect is to reduce the velocity of the air flowing above your hand. Therefore the pressure above your hand has dropped and is below that of the pressure under your hand. This difference in pressure is what causes lift. Downwash plays a role, but does not account for lift when an airfoil is at 0 degrees angle of attack.
Speaking of the Wright Bros, does anybody have any news (links) on a competition that is currently being held to re-create the Wright Flier and fly it at the centenary of manned powered flight? Last I heard there were two teams.
-Q.
Originally posted by NebulaDDS
Lastly, I'm 99% sure that there's an increase in pressure under the airfoil, combined with a decreased pressure. Try this:
drive in your car at 60mph, and stick your hand out the window with your palm facing down, but angled upwards at about, oh, 10 degrees. You'll feel a force on your palm. That's pressure (divided by the area of your palm).