>=A0A baseball certainly isn't a airfoil. =A0I No. But > It generates > this lift by changing the angle of its wake due to its spinning. Mayhaps http://en.wikipedia.org/wiki/Coand%C4%83_effect R --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .