[vj]

PowerDraw you have the impact circle axis. Rhythm is dead on in my belief about Hogan. The video sequence here with the grids is a "staged" image of Hogan and my research shows that he uses a different pivot sequence during these moments. The pics from Palm Springs are the same.

Hogan's secret is a pivot sequence which ensures low point moving forward. Nicklaus from his instructional video "How I play golf" moves low point forward also. This is also evident in Bobby Jones instructional videos. One of the biggest differences between the above mentioned is the speed at which Hogan's hips turned in the downswing. Through words and in action, Mr. Hogan believed in cranking up the gyroscope! Following Leitz's instructions I pieced together a particular swing in which Hogan rotates his hips a total of 100 degrees in 0.18/sec. It is evident this type of speed is correlated to having the center of mass over an axis of rotation. Great swings start from the ground up and Mr. Kelley eloquently speaks of this in 6-C-0.

Involved in this sequence is also the shallowing of the pane of glass. Mr. Hogan's shallowing of this pane takes place as his weight is shifted to the forward leg during the backswing. Tiger's goes down, just as most, during start down. These motions, coupled with hip slide/hip turn have effect on the relationship between low point/the golf ball and impact vectors.

Every swing is a puzzle. Every shot is a puzzle. Golf instructors, like the ones here on Lynn's corner of cyber space, sometimes just point to the correct piece and sometimes create the piece from scratch. But they do it with passion, sincerity, and honesty for enhancement of an individual's game.