[pistol]

Pistol

I think that the critical issue is not Welch's proprietary software program that measures the angular velocity of different body parts during the downswing. I think that the critical issue is the underlying physics/biomechanical principles that underlie Welch's thinking when he eventually interprets his measured results. That's what bothers me! It is his underlying ideas regarding "conservation of momentum and summation of speed" due to a braking phenomena that bother me, and his consequent idea that each rotating body part must get sequentially accelerated to exactly twice the speed of its preceding rotating body part via this braking phenomenon.

Jeff.

I see your arguement Jeff but like I said ..the best bet is to go and check him and his system out and get the information ..then make a "scientific review" of his concepts rather than present a TPI view of possible weaknesses in his system