[Yoda]

Yoda - you wrote-:

"As I've already explained twice in this thread, the Clubshaft is responding to the Sweetspot's Centrifugal Line of Pull. It is NOT creating it (as you continue to insist). In fact, this 'bass-ackwards' thinking is your fundamental error.

The Sweetspot is orbiting, and in so doing, is creating a Centrifugal Force (Clubhead Inertia resisting a change in its direction). The Clubshaft is supplying the Centripetal Force that enables that orbit."

I appreciate your input, but I have a different explanation for observed events.

I agree that the clubshaft is not creating the centrifugal line of pull. (The clubshaft is creating another force - which I will explain later).

I think that you are wrong to state the clubshaft is supplying the centripetal force. The CP force is created by the hands holding the clubshaft, and the clubshaft is simply the connecting structure between the clubhead and the hands.

Here is my explanation. I created this model.



Imagine that a person is twirling a ball (attached to a piece of string) around his head. Imagine that he grasps the string between his right index finger and his thumb in a pincer grip and imagine that he holds his right hand vertically above his head and moves his right hand in a constant small circular motion. That circular motion is represented by the small inner circle.

Imagine that the string length is 18" and the red ball is attached to the end of the string.

The ball will travel in a constant circular path (represented by positions 1 and 2 and 3). The CP pull is exerted by the hands and the pull is along the length of the string and the CP force is at right angles to the ball position (right angles to a tangent at the circumference) at any point in time. The ball wants to travel in a straight line (at a 90 degree tangent to the circumference of the circle) at every moment in time, but it is prevented from that action by the CP force that is directed towards the center of the circle. The string transmits the CP pulling force from the ball to the hands (inwards pull towards the center). The string doesn't create the CP force. The ball travels in a perfect circular motion because the CP force (directed inwards towards the center via the string) balances the CF force (hypothetical outward -directed force).

[Bold emphasis by Yoda.]

Jeff,

You have made two statements that are in direct conflict:

Behind Door #1:

"The CP pull is exerted by the hands and the pull is along the length of the string . . . "

Behind Door #2:

"The string transmits the CP pulling force from the ball to the hands (inwards pull towards the center)."

So which is it, Jeff?

Does the hand -- it really should be singular as defined by your model -- create the CP pull (hand to ball) or does the ball create it (ball to hand).

Hint:

We need a third door.

We are concerned here with a mass orbiting about an axis of rotation and exhibiting both a centripetal force (a force 'seeking the center' and whose origin we are now debating) and a centrifugal force (a force 'fleeing the center' and that is reactive to the centripetal force). An orbiting mass constantly accelerates towards its axis of rotation. This centripetal acceleration demands an equal and opposite force that opposes the centripetal force and creates an outward centrifugal reaction directed away from the axis.

In your model, the ball is the orbiting mass and the hand is the axis of rotation. The hand is not the centripetal force (as you incorrectly state). It is, after all, the axis! Instead, the centripetal force (acceleration) is exerted on the ball by another object (in your model, the string). Then, the centrifugal reaction is exerted by the ball on the object that originated the centripetal acceleration (the string).

The string, Jeff.

The string.