I think that I may understand why so many golfers "feel" like the hosel is rotating around the sweetspot post-impact.
As Yodas Luke pointed out, if one rotates the club in a lathe, the axis of rotation would be through the COG of the clubhead (sweetspot) and the hosel would rotate around the sweetspot. In other words, if a golfer "feels" like he is rotating his clubshaft very actively through impact, he may acquire the "feeling" that the hosel is rotating around the sweetspot. What would cause a golfer to rotate the clubshaft actively through impact?
I believe that many golfers over-rotate their hands through impact under the mistaken assumption that one should have a supinated left hand post-impact, and that the clubface should be facing slightly groundwards post-impact. AJ Bonar teaches this action - called an active hand crossover release action.
AJ Bonar uses this composite photograph to make his point.
If you mimick that hand swivel action through impact, then you will certainly acquire a "feeling" that the hosel is rotating around the sweetspot.
However, the true wonder of Homer's work on hinging actions is that he demonstrated that there should be no swivel action during the followthrough phase, and that the finish swivel action must be delayed to the post-followthrough phase of the swing. During the followthrough phase, there is a small amount of clubface roll-over when utilizing horizontal hinging action, but during that HH action the left wrist remains vertical to the ground. In other words, the left wrist does not supinate during the followthrough phase, and there should not be a "feeling" of the hosel rotating around the sweetspot.
Consider this birds-eye view of Jack Nicklaus' swing.
Between impact and the fourth parallel (images 1-4) the clubface rotates 90 degrees. However, the hosel does not rotate around the sweetspot - because the clubshaft is always kept in front of his rotating body (butt end points at his navel) and there is no independent hand rotation. Note that the back of his left hand is vertical to the ground - as if there is a vertical hinge mounted in his left shoulder socket allowing the entire left arm-clubshaft to rotate at the same rpm. If more golfers pivoted as well as Jack Nicklaus post-impact, then I think that there would be less sympathy for the idea that the hosel rotates around the sweetspot post-impact.
It is true that the hosel rotates around the sweetspot when one rolls the club on a tabletop. However, that happens because the clubshaft is rotating around its longitudinal axis with no lateral movement of the entire clubshaft in space. That phenomenon doesn't happen in the golf swing. The clubshaft only rotates in space due to the fact that the left hand rotates in space - due primarily to the movement of the left arm in the left shoulder socket while the left shoulder socket simultaneously moves in space because the upper torso rotates in space. If a golfer has a synchronised swing - where the arms rotate synchronously with the rotating torso - then most of the rotation of the back of the left hand, and therefore clubface, will be due a global/proximal movement and not due to the clubshaft rotating independently around its longitudinal axis. That's what I tried to demonstrate with the Jack Nicklaus composite photograph.
I would like to see you attempt to present a solid TGM-based argument that demonstrates that the straightening right arm controls the rate/rpm of rotation of the left hand/clubface. It is my belief that the left hand controls the clubface via the biomechanical action of a hinging action (variable degree of external rotation of the left humerus in the left shoulder socket while the torso continues to rotate).
The AJ Bonar methodology is a recipe for disaster - a recipe for an inconsistent ball flight direction because it is so dependent on exquisite timing. I am not surprised that professional golfers use a release swivel action followed by a hinging action - and that they do not use any "active" hand manipulations through the impact zone.
You wrote-: ". I don' think you quite understand what you think you do re: the finer points of TGM."
That is very likely true. That's why I like to read other forum members' opinions. I always hope to continually improve my knowledge re: the finer points of TGM.
Hopefully, Yoda will make an insightful post regarding the Sergio Garcia and Tiger Woods swing sequence that he requested that I produce.
I think there was an earlier post which asked that you take a club and hold it between your finger and thumb (top of the grip)and let it hang .Then rotate the grip back and forth.The shaft does not hang vertically.The clubshaft rotates around the sweetspot(as does the toe of the club),do you think this FACT will not occur when free swinging a club -with no clubface manipulation(ie horizontal hingeing)?
I think there was an earlier post which asked that you take a club and hold it between your finger and thumb (top of the grip)and let it hang .Then rotate the grip back and forth.The shaft does not hang vertically.The clubshaft rotates around the sweetspot(as does the toe of the club),do you think this FACT will not occur when free swinging a club -with no clubface manipulation(ie horizontal hingeing)?
No... it doesn't happen during the swing. When the club is suspended the CG of the club seeks the low spot... That's where the ineria is minimized. when its twisted from this pos. , the hossel naturally rotates around the cog.
When swinging the club... force is imparted not the the cog but to the shaft through the grip. It would be leading (on the plane of the swing) and the Cog would naturally want to "fall in line" on the plane. The face would want to open not close. But because of golfer anatomy the wrists rotate on the downswing taking the face with (provided grip doesn't slip)
Wholeheartedly agree.....
Hybrid Mode
