Doesn't anybody read "Search For The Perfect Swing"? It showed that with good friction during collision, the ball will start in a direction which is 65% of the difference between the clubface angle and the clubhead path, favoring the clubface angle. Reduced friction moves the starting direction closer to the clubface angle. The book debuted in '68, way before "The Physics of Golf", and one year before Homer's. The research findings are all being confirmed present day by TrackMan. I don't think Homer was too pleased that a golf "science" book came out one year before his life's work. I don't beleive that many TGM devotees have studied "Search", but if you want a plethora of good science regarding the impact collision and much else, including biomechanics of the golf swing, then read "Search". It can only aid your understanding of TGM.
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