After reviewing 10-10, this gets my vote for the worst explanation and pictures in TGM.
Here is my attempt at understanding it.
Hinging
10-10-A. Horizontal Hinging. The clubhead is on a vertical plane (e.g. putting). So Horizontal hinging is an arm (flying wedge) roll. The arm rotates in the shoulder socket. The clubhead moves forward and out. The clubface closes, and hoods, relative to both the plane and the ball.
10-10-B Vertical hinging. The clubhead is again on a vertical plane. Vertical hinging is the arm moving in the shoulder socket across the body. The clubhead moves forward and down, relative to the ball and the plane. The clubface lays back, relative to both the plane and the ball.
10-10-C Angled hinging. The clubshaft is on an angled plane. Angled hinging is the arm moving in the shoulder socket across the body. There is no rotation in the shoulder socket. The clubhead moves forward and down, and out, relative to the ball. The clubface lays back and closes on the downswing, relative to the ball. The clubface lays back on the downswing, relative to the Inclined Plane. In fact, Angled Hinging is just vertical hinging on an Inclined Plane.
10-10-D Dual Horizontal. The clubshaft is on an angled plane. The angle mounted hinge is static. The angled hinge represents the raising of the arms in the shoulder socket in front of the body. This allows the clubhead to be on an angled plane. The arm rotates in the shoulder socket. The clubhead moves forward, and up(!) relative to the ball. The clubface closes, and hoods, relative to the ball. The clubface closes, relative to the Inclined Plane.
10-10-E Dual Vertical. By my understanding, this would be the same as Angled hinging. (Something is wrong here).
I think the problems with Hinging in TGM are as follows.
1. The pictures are describing an action, but there is only one picture per action. Two for each would do wonders.
2. He says "The clubhead is on a vertical plane". What is the geometric representation of a clubhead ? Is it a point (sweet spot), a line, a sphere ? If the clubhead is on a vertical plane, where is the clubshaft ? Where is the arm ? If the "clubshaft is on an angled plane" where is the clubhead ?
3. The shoulder moves in two independant directions, and rotates as well. For each action, what are the directions the arm moves in at the shoulder. Across the body ? Up and down (is this the angled hinge in dual hinging ?) ? Does it rotate the arm ? From what position does the action take the arm from and what position does it go to ?
4. In 2C-1 we see the Swingers Hinge. The clubface is closing, the clubshaft is moving forward, the clubhead is moving down, and out. What are the elements that are driving these motions ? Arm rotation ? Forearm rotation ? Pivot (shoulders moving down, and or around) ? Arms moving down in the shoulder socket ? Arms moving left across the body in the shoulder socket ? The right wrist unbending ? The left wrist swivelling ?
Wrist positions
Arched/Flat/Bent,Cocked/Uncocked are easily understood. They are clearly recognized looking at just the hand and the forearm. Turned/Vertical/Rolled are not. The wrist can be rolled and turned by either the elbow or the shoulder (or the pivot, if vertical is relative to the ground). In addition, the wrist is sometimes referred to as "vertical to the ground", or "vertical to the Inclined Plane". What is the geometrical representation of the wrist in this context ? Is it a line, a plane ? When we see "vertical" with regards to the wrist, with no reference point, is it relative to the ground, the plane, the elbow, the shoulder ?
Some of this is redundant with earlier posts, but I'm trying to get everything clear in one place.
When two men of science disagree, they do not invoke the secular arm; they wait for further evidence to decide the issue, because, as men of science, they know that neither is infallible. But when two theologians differ, since there is no criteria to which either can appeal, there is nothing for it but mutual hatred and an open or covert appeal to force.
- Bertrand Russell Can Religion Cure our Troubles, 1954.
Here is my attempt at understanding it.
Hinging
10-10-A. Horizontal Hinging. The clubhead is on a vertical plane (e.g. putting). So Horizontal hinging is an arm (flying wedge) roll. The arm rotates in the shoulder socket. The clubhead moves forward and out. The clubface closes, and hoods, relative to both the plane and the ball.
10-10-B Vertical hinging. The clubhead is again on a vertical plane. Vertical hinging is the arm moving in the shoulder socket across the body. The clubhead moves forward and down, relative to the ball and the plane. The clubface lays back, relative to both the plane and the ball.
10-10-C Angled hinging. The clubshaft is on an angled plane. Angled hinging is the arm moving in the shoulder socket across the body. There is no rotation in the shoulder socket. The clubhead moves forward and down, and out, relative to the ball. The clubface lays back and closes on the downswing, relative to the ball. The clubface lays back on the downswing, relative to the Inclined Plane. In fact, Angled Hinging is just vertical hinging on an Inclined Plane.
10-10-D Dual Horizontal. The clubshaft is on an angled plane. The angle mounted hinge is static. The angled hinge represents the raising of the arms in the shoulder socket in front of the body. This allows the clubhead to be on an angled plane. The arm rotates in the shoulder socket. The clubhead moves forward, and up(!) relative to the ball. The clubface closes, and hoods, relative to the ball. The clubface closes, relative to the Inclined Plane.
10-10-E Dual Vertical. By my understanding, this would be the same as Angled hinging. (Something is wrong here).
I think the problems with Hinging in TGM are as follows.
1. The pictures are describing an action, but there is only one picture per action. Two for each would do wonders.
2. He says "The clubhead is on a vertical plane". What is the geometric representation of a clubhead ? Is it a point (sweet spot), a line, a sphere ? If the clubhead is on a vertical plane, where is the clubshaft ? Where is the arm ? If the "clubshaft is on an angled plane" where is the clubhead ?
3. The shoulder moves in two independant directions, and rotates as well. For each action, what are the directions the arm moves in at the shoulder. Across the body ? Up and down (is this the angled hinge in dual hinging ?) ? Does it rotate the arm ? From what position does the action take the arm from and what position does it go to ?
4. In 2C-1 we see the Swingers Hinge. The clubface is closing, the clubshaft is moving forward, the clubhead is moving down, and out. What are the elements that are driving these motions ? Arm rotation ? Forearm rotation ? Pivot (shoulders moving down, and or around) ? Arms moving down in the shoulder socket ? Arms moving left across the body in the shoulder socket ? The right wrist unbending ? The left wrist swivelling ?
Wrist positions
Arched/Flat/Bent,Cocked/Uncocked are easily understood. They are clearly recognized looking at just the hand and the forearm. Turned/Vertical/Rolled are not. The wrist can be rolled and turned by either the elbow or the shoulder (or the pivot, if vertical is relative to the ground). In addition, the wrist is sometimes referred to as "vertical to the ground", or "vertical to the Inclined Plane". What is the geometrical representation of the wrist in this context ? Is it a line, a plane ? When we see "vertical" with regards to the wrist, with no reference point, is it relative to the ground, the plane, the elbow, the shoulder ?
Some of this is redundant with earlier posts, but I'm trying to get everything clear in one place.
When two men of science disagree, they do not invoke the secular arm; they wait for further evidence to decide the issue, because, as men of science, they know that neither is infallible. But when two theologians differ, since there is no criteria to which either can appeal, there is nothing for it but mutual hatred and an open or covert appeal to force.
- Bertrand Russell Can Religion Cure our Troubles, 1954.
