You wrote-: "MAYBE THEY THINK THEY ARE DOING THAT. BUT IF THEY ACTUALLY ARE ROTATING THE CLUBHEAD ABOUT THE HOSEL , THEY ARE IN FOR A SHANK".
I don't think that a golfer ever rotates the clubhead around the clubshaft axis. It only "feels" like it is happening when the golfer notes that the toe passes the heel in the followthrough.
What causes the clubface to close is simply the phenomenon of the flat left wrist/hand rotating in space. What causes this rotation?
Pre-impact, the release swivel action is due to external rotation of the left humerus within the left shoulder socket combined with a small amount of left forearm supinatory movement - all these biomechanical actions are passive and are merely the reversal of the rotary biomechanical actions that occurred in the backswing.
Post-impact, the flat left wrist/hand rotates around to the left due to a horizontal hinging action, which is biomechanically due to external rotation of the left humerus within the left shoulder socket while the left shoulder socket moves left/backwards due to continued torso rotation.
The clubface remains neutral relative to the left hand and it doesn't roll-over relative to the flat left wrist/hand because the left hand always firmly grips the club and never allows the clubshaft to rotate within the grasp of the left hand. The clubface simply rotates to exactly the same degree as the flat left wrist/hand rotates pre-impact and post-impact.
You wrote-: "MAYBE THEY THINK THEY ARE DOING THAT. BUT IF THEY ACTUALLY ARE ROTATING THE CLUBHEAD ABOUT THE HOSEL , THEY ARE IN FOR A SHANK".
I don't think that a golfer ever rotates the clubhead around the clubshaft axis. It only "feels" like it is happening when the golfer notes that the toe passes the heel in the followthrough.
What causes the clubface to close is simply the phenomenon of the flat left wrist/hand rotating in space. What causes this rotation?
Pre-impact, the release swivel action is due to external rotation of the left humerus within the left shoulder socket combined with a small amount of left forearm supinatory movement - all these biomechanical actions are passive and are merely the reversal of the rotary biomechanical actions that occurred in the backswing.
Post-impact, the flat left wrist/hand rotates around to the left due to a horizontal hinging action, which is biomechanically due to external rotation of the left humerus within the left shoulder socket while the left shoulder socket moves left/backwards due to continued torso rotation.
The clubface remains neutral relative to the left hand and it doesn't roll-over relative to the flat left wrist/hand because the left hand always firmly grips the club and never allows the clubshaft to rotate within the grasp of the left hand. The clubface simply rotates to exactly the same degree as the flat left wrist/hand rotates pre-impact and post-impact.
Jeff.
I think there is more at play here than just the swivel. Swivel does play a part but not the only part Im guessing.
Consider this photo of Homer Kelley. Somewhere on this site (I cant find it) is a post by Yoda describing what it is that Mr Kelley is swinging around his head. Something like a balsa wood club head with a small metal screw acting as the sweet spot and creating a COG similar to a real club.
You'll note the position of the string from #3 to the sweet spot. Not so "imaginary" here is it? Also of note is that the club face stays aligned nicely via CF without any involvement what so ever of forearm rotation or swivel.
It was Yoda who took this photo, he said the smiles seen here were due to Mr Kelley's first failed attempt that saw the string wrap itself around his body.
Yodasluke. Anybody.
Why should the "virtual clubshaft" be defined as the string from pp#3 to sweetspot? Why not pp#2 to sweetspot instead, since the CF is involved with pp#2 as one of the swing centers?
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