"Mxsmanic" wrote in message
...
The essential feature of an airfoil is that it twists the flow of air as
it
passes (or as the airfoil passes through still air, which is equivalent,
and
that's how it works in airplanes). The air is accelerated downward, and
this
engenders an equal and opposite force that is lift.

Nope. That wouldn't explain how wing sections for tailless planes work. The
sections for those curve up towards the trailing edge. The leading edge
produces lift but the trailing edge produces a _downward_ force to counter
the pitching moment. Example section...

http://www.desktopaero.com/appliedae...image13_43.gif