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Old 09-16-2012, 07:31 AM   #7
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Originally Posted by Raul_SJ View Post
I will study this...

I am not clear on the "8 o'clock to 2 o'clock" brushing motion.
I am using that for a Topspin serve -- where the bounce is pretty much straight ahead.
When we hit topspin serve the theta angle is usually around zero degree ϴ =0. Then, according to formulas (1), see post #1

VGyrospin = VSpinHor*sin(ϴ) = VSpinHor*sin(0) = 0

So, the ball doesn’t bounce to the right.

Because of different magnitude of ϴ we can swing from 8:00 to 2:00 and produce different ball’s rotation.
Anatoly Antipin - one of the most delicate tennis players in the world.

Last edited by toly; 09-19-2012 at 10:52 PM.
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