quote:
Originally posted by rwh
quote:Originally posted by Ringer
Interesting DDL. Do you suppose they avoid the biological definition of hinging for a seperation of the different actions?
Hinge Action is associated with what the Flat Lead Wrist is doing to control what the Club
face is doing during the Impact interval.
Mr. Kelley's idea was to
visualize a hinge mounted on the lead shoulder joint in such a way so as to permit the Lead Arm and the Flat Lead Wrist to move in
only one of three planes of motion: horizontal, vertical or angled. Since the shoulder is a ball and socket joint, his use of "hinge" is accurate as a
concept, only. The idea works like this:
IF the shoulder had a Horizontal Hinge, the Lead Arm/Flat Lead Wrist would move horizontally, only, like a door closing. This produces a closing only action of the Club
face.
If the shoulder had a Vertical Hinge, the Lead Arm/Flat Lead Wrist would move vertically, only, like a pendulum, thereby producing a Lay-back, only, action of the Club
face.
If the shoulder had an Angled Hinge (e.g., a hinge mounted on the roof of a house), the Lead Arm/Flat Lead Wrist would simultaneously close and Lay-back, much like the action of a canoeist's paddle, thereby producing a simultaneous closing and Lay-back of the Club
face.
In practice, some people actually visualize a hinge in their shoulder, but I believe most just monitor the action of the Flat Left Wrist through the Impact Interval. There is a definite feel associated with each. It's really very easy once you get the hang of it.
This is a very basic explanation. If you're interested in a detailed, expert explanation, Yoda has posted extensively on the subject, including photos, on the Chuck Evans Forum and The Golfing Machine Forum.