HK is saying that much of the Spin on a Ball is caused by the Line of Compression although some spin is caused by the ball rolling on the face of the inclined striker. Hinge Action controls the Line of Compression, therefore Hinge Action also is a factor in determining altitude and Spin; Ball Control.
Just to clarify, are you saying the amount of the spin is mostly caused by the Line of Compression? Does speed play a part? Does loft play a part? Is HK also assuming a centered strike?
He goes on to say in 2-C-0 that maximum compression is the ideal result. Where can I find his definition of compression?
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