[O.B.Left]

THRUST 6-C-1 #4 "wherever the straight Left Arm contacts the left side. And. The picture with caption "#4 Edged Arrow.

Preface; I have been thinking about shoulder turn and the above has always been problematic to me.

The general thought seems to be the left arm is "moved" by the contact point with the chest. My belief is the left arm (#4 accumulator when not in line with the shoulders) is accelerated axially by a pure pull and radially by change in angular velocity of the turning shoulders. The 6-c-1 presentation is not helpful to my construction. Any contact between the arm and chest is purely incidental and not necessary for proper actuation of #4 accumulator.

Other thoughts??

HB

Trying to get this back on track .

If we equate #4 pa to a triangle model with the angle formed by the left arm and the line of the shoulders representing the lever in question . The left shoulder being the point where the two lines meet obviously . Given a straight left arm and the fact that the shoulders are fixed in their length two sides of the triangle are predetermined in terms of their length. Any lengthening in the Right Arms side of the triangle , increases the angle at the left shoulder and vice versa. The loading of the #4pp and the firing of #4 power accumulator relating to the bending and extension of this lever or angle. #4 pa being Left Arm Power how ever it is produced.

So agreed the "any point of contact" seems outside of a pure or simplistic 2D geometric model. For the golfer whose motion is 3D the point of contact between left arm and chest will change for different shots. Depending on the amount to which the left arm is raised vertically, the plane of the shoulder turn and the length of the swing etc etc. You can fire #4 with a one degree change in the angle ... Say from 90 degrees to 89 and then back to 91. A mini Pull Minor Basic Stroke with the shaft vertical and the ball played at low point ..... not your normal put or chip shot set up no.

Is Homers "any point of contact" merely an effort to help us locate the angle on a human golfer given the various places it could be formed for different strokes?