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Old 02-07-2013, 11:13 PM   #23
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Join Date: Feb 2006
Location: Stuck in the Matrix somewhere in Santa Clara CA
Posts: 10,767


Curious that you deleted your post as I was about to reply to it. FYI, Rod Cross is a retired physics professor from the University of Sydney (but still appears to be member of the university staff). He has a PhD in plasma physics and is also considered an expert in sports mechanics and forensic physics. TWU (Tennis Warehouse University) was developed by Rod Cross and Crawford Lindsey.

These 2 men co-authored Technical Tennis which talks about spiralspin in some depth. They also collaborated with physicist, Howard Brody to write The Physics and Technology of Tennis. In the following TWU article, Physics of the Tennis Kick Serve, Rod Cross talks a bit about gyrospin (aka spiralspin or corkscrew spin).
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