Olin Lathrop wrote: > I'm not sure what you're overall point is. =A0You seem to be trying to > describe how the lift forces on the wing are generated, but how ever they > are generated it doesn't change the fact that ultimately a plane stays up= by > pushing down on air. I think he is trying to state that a plane hangs on by pulling the air down, not "stays up", by "pushing down on air". Probably you should have used "moving air down", not "pushing air down". But that's absolutely not important in the context as for me. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .