To be 'technically' correct... a wing with camber (curved) can generate
lift at zero angle of attack. A symmetric airfoil (such as a flat brick)
cannot, it must be at a positive angle of attack to generate lift (but the
point is... it CAN). Both generate lift (positive C sub L) but at different
AOA. At 'normal' airspeeds the coefficient of lift may not be sufficient
for a brick to generate enough lift to fly, but then again if the airspeed
was high enough....

Here's some reading on the subject....

"...Almost any relatively flat surface could be made to generate some lift.
In fact, a perfectly flat thin plate will do the job. If you don't believe
that, try out any of a number of simple little balsa-wood hand launched
model gliders. Most of them have flat wing sections, and they fly. The flat
plate, then, is probably the simplest of airfoil sections, as shown in
Figure 5..."

From the following site

http://142.26.194.131/aerodynamics1/Basics/Page4.html

Mark

"Robert Briggs" wrote in message
...
Ed Rasimus wrote:

Higher speeds mean the store can generate lift (just like any curved
surface.)

IIRC, "curved" is unnecessary here. After all, they do say that, given
enough thrust, a brick will fly, do they not?