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Hinge Action -- A Primer

Chapter 2

 
 
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Old 04-27-2006, 12:08 PM
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Hinge Action - A Primer GM#263
Originally Posted by tgmgolfer2k2
Originally Posted by FeverPowerful
"across the target line"

Does that mean it's facing to the right (if I'm right handed)?

Thanks Yoda.

No.

We have our target line laying on the ground, usually parallel to our stance line. At followthrough, both arms are straight and the clubhead is still "underneath" our hands. The clubface, at this point, reflects the hinge action we've applied.

If the clubface's leading edge is parallel to the target line, horizontal hinge.
If the leading edge is perpedicular to the target line, vertical hinge.

If the leading edge is between those two extremes, or at a 45* angle to the target line, angled hinge. Here's where your question comes in. Yoda says that the leading edge for an angled hinge will point across the target line. He means that it intersects the target line at an angle (a 45* angle). The clubface is closing through impact (angled hinging is layback and closing) so the clubface will point 45* to the left.



It kind of hard to explain to someone in words, and I know I didn't "get it" right away either. But I (or anyone who understands it) could demonstrate it in under 30 seconds. Post if you don't understand my
descriptions.

[Bold by Yoda]

Another good post, Robot Buddy R2D2, and you've almost got it.

In 2-G, Homer is speaking in "approximations" and tells us that at the end of the Follow-Through, the Toe of the Club will point "along the Plane Line." Your conclusion that this would put the Leading Edge parallel to the Line is understandable -- but inaccurate -- and would actually result in an Over Roll. This Over Roll is a Swivel Wrist Action -- instead of the desired Vertical (to a Horizontal Plane) Hand Motion -- and it will disrupt the true Horizontal Hinge Centrifugal Rhythm of the No. 3 Accumulator (6-B-3-0) and produce Throwaway.

To see for yourself exactly how much the Clubface Closes through the Impact Interval -- and accordingly, how much the Toe points down the Target Line -- try this experiment:

Face a slightly open door with the doorknob on your right and the doorjam on your left. Position a putter or short iron on the face of the door with the Clubface flat against it and the Toe protruding slightly from the door's lower edge. The Shaft will be flat against the door and running up into doorknob area.

Now, push the door open while maintaining the Club against it. As the door swings open, watch the Clubface (and Toe) "Close" in relation to a "Target Line" (running North through the doorway). Though not on an Angled Plane, this is the exact Horizontal Hinge Motion the Clubface should take through Impact.

You can see that you would have to swing the door all the way open (a 90 degree arc) before the Leading Edge of the Club would be parallel to the "Target Line." And this would exceed the limits of the normal Follow-Through and Hinge Action.

So, in the Chip Shot Follow-Through example of 2-G, with the Club at 45 degrees to the ground, the Toe will be pointing "generally" along the Line, but not so much as to make the Leading Edge parallel.

Now that we've gone through the above drill and understand the correct Horizontal Clubface Motion through Impact, it is time to forget about the Clubface altogether and go about the really important work of Educating the Left Hand to produce it. Hold your Left Arm straight out in front of you with your Left Hand vertical to the ground in a karate chop position. Keeping your arm in its Horizontal Plane, swing it to the side just as if it were a hinged gate. Stop when you've made an arc of about 45 degrees (about half way between the front of you and the left of you). Then, lower the Left Hand down until it would point just inside a Plane Line. That is the position of the Flat Left Wrist at the end of the Follow-Through. Notice that your fingers are pointed generally "along the Plane Line."

After doing the above drill a few times to make sure you've got it right, put a Short Iron in your Left Hand (only) and repeat it. Verify that the Clubface does exactly what your Left Wrist does. This is Left Hand Hinge Action control of the Clubface.

It is the key to Ball Control.
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