View Single Post
Old 02-16-2013, 05:11 PM   #11
luvforty
Banned
 
Join Date: Dec 2012
Posts: 1,294
Default

actually...

the definition of 'penetration' is speed... you can't have a floaty slice that penetrates, even if it spins at 10000 rpm...because after the bounce all that 10000 rpm underspin becomes 50rpm topspin.

and to produce speed is simple, you need the hitting unit of arm/racket moving FORWARD at impact.
luvforty is offline   Reply With Quote