"Dave" wrote in message
ups.com...
If you will be satisfied with empirical evidence, stick your hand out
the window of the car while going 50-60 MPH. Experiment with different
angles of attack. You will no doubt experience lift when your hand has
a positive angle of attack. Poor man's wind tunnel - but illustrates
that just about anything relatively flat will fly
given enough speed and a positive angle of attack.

That's why wings have camber. 'Cause they don't need 'em.

Bertie's a shill for the Alcoa Camber Conspiracy. ...they've sold more
metal by convincing every successful aircraft designer and manufacturer in
the history of aviation that upper camber is necessary, when all they need
are two simple deflection plates.

Fortunately, the wizards at sci.physics have busted the conspiracy and we
all see now how the designers of all aircraft were grievously wrong.

-c