Olin Lathrop wrote:
> Let's say you're viewing a pitch in crossection with the pitcher on
> the right throwing towards home plate on the left.  In this view, a
> curve ball is rotating clockwise.  The wake behind the ball has a
> downward angle. Since the ball is imparting downward momentum on the
> air, it is receives a net upwards force.

Oops.  I re-reading this I realized I flipped curve ball and rising
fastball.  A curve ball drops more than a ballistic path, and spins
counter-clockwise in the above illustration.  A rising fastball rises more
than a ballistic path and spins clockwise.  Sorry for the confusion.

--=20
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