Golf: Parametric Acceleration

The first stage of the DS is a drop ...no power is applied ....at 1/2 way down, the left hand pulls up ...AND it is this pull that speeds up the clubhead ... the big misconception in golf is the belief that you are hitting with the right arm ...not true ...you hit with the legs / torso and pull with the rising left side flinging the clubhead thru the ball

Rising grip needs a straight wrist moving diagonally vertical

I think you need lower hands at P3 (half-way down) ... agree with the hip rotation bit. However, I use extensor action at the top and then simply turn thru the ball with the torso ...arms are like thick ropes that whip thru impact with a bowed left wrist and flexed right wrist. Hands are ahead of ball at impact due to your bump left and hip turn ...not a purposeful thrust of the arms forward. I do have a thrust element to my swing ...this is created by the diagonally upward push of right big toe and the vertical upward thrust of the left knee (parametric acceleration) ..if timed correctly you get massive flash speed thru impact?

Rising grip needs a straight left wrist positioned in front of ball ....moving diagonally vertical and rearward thru impact (in unison with left shoulder) whilst clubhead moves outward to the right

extension

Notice how Left arm and shaft create a single long lever for exponential power generation

..a neutral grip with a slightly closed stance swinging along the toe line gives me a nice draw flight ... in the transition, make sure to drop hands vertically and get into a "torqued squat" ...going into impact envisage the inside of right knee moving in tandem with the clubhead ...impact for me is a lifting sensation ...left shoulder & hands lift up....left leg straightens and the wrist cock releases by itself ...sort of like the hammer throw in track and field

note how hands stay in front of torso ...even in the FT ...the is the key factor in the "body swing" ...using the big muscles of the legs and upper body vs. the arms

...center of pelvis shifts fwd in DS and, at impact, is directly above the inside of left heel (i.e. where ball is teed up for a driver) ...basic rule of thumb is to move the pelvis (zipper on pants) 1" to the right in BS and 4" left in DS ...no more than this !!

see how the shaft is NOT centered between the arms at impact ....the shaft is only centered in SLR

Impact ....sense the left hand is pulling up and the right shoulder is traveling under the chin