[Jeff]

Yoda - Consider again my demonstration of the clubshaft lying on the plane board.

In my example, I stated that the clubshaft lies against the inclined plane board throughout the impact zone. In that practical example I let the clubface close gradually pre-impact and post-impact. However, I also stated that I could vary the degree of clubshaft rotation during the pre-impact phase (to simulate the release swivel phenomenon) and vary the degree of clubshaft rotation post-impact to simulate different hinging actions.

Here is a capture image showing the situation.



The yellow line represents the ball-target line and also the base of the sweetspot plane.

The red line represents the sweetspot plane line (drawn from PP#3 through the sweetspot ).

The green line represents the clubshaft plane - note that the base of the clubshaft plane is inside the ball-target line.

Do you believe that this practical example is actually happening in a golf swing? In other words, do you think that the clubshaft is traveling on its own clubshaft plane through the impact zone while the sweetspot is traveling on its sweetspot plane?

If your answer is yes - then consider your statement in your last post.

You stated-: "the clubshaft has rotated onto the plane of the sweetspot."

Do you imagine the hosel rotating around the sweetspot? If you imagine the hosel rotating around the sweetspot post-impact, then does the hosel have to leave the surface of the clubshaft plane to achieve that goal? If not, then how do you mentally envisage the hosel rotating around the sweetspot? If the hosel has to leave the clubshaft plane to rotate around the sweetspot, then how one can infer that the clubshaft is on its own inclined plane through the impact zone?

If you are tempted to answer that the hosel leaves the clubshaft plane in order to rotate around the sweetspot post-impact, then look at the following Martin Hall swing video.

Note that he is using a simulated golf club that has very long clubhead (>12" in length). If that club has the same club lie angle as a regular club, then doesn't Martin have to swing the club along the same clubshaft inclined plane (along the surface of that plane board) even though the sweetspot plane angle in this example is going to be very different to the clubshaft plane angle. Then, in what sense do you imagine the hosel rotating around the sweetspot of that clubhead post-impact? Also, in what sense do you imagine the clubshaft rotating onto the sweetspot plane of that club post-impact?

Jeff.