Yoda told me a long time ago to place this in the incubator. Now, it has finally found a home...
Yoda,
I'm still having trouble seeing the Slice tendency of the Angled Hinge. I keep looking at Mr. Kelley's illustration 2-C-1 #3, wondering how the illustration would differ if it were Angled Hinging. And although there is no Layback with a Horizontal Hinge, isn't there some Layback with a Dual Horizontal Hinge?
The answer you seek is that the first Clubface in 2-C-1 #2A/B and #3 would be more 'Closed.' This is because the Angled Hinge is producing a Clubface 'closing' that is less than that of Horizontal Hinging. Per 1-L #17, the Clubface must be square to the Line of Flight at Separation. Therefore, with Angled Hinge Action it must be more Closed at Impact to allow for that 'Opening.' Otherwise, a slice will result.
Don't expect to understand what I'm about to say, just throw it in your Incubator in hopes of some future feathers. In Horizontal Hinging both the Shaft and the Clubface are rotating around the same Center. Hence, there is a Centered Motion and the Point of Compression is maintained. However, in Angled Hinging, the Clubface is constantly staying vertical to the surface of the Angled Plane (and more and more open to the Plane Line versus Horizontal Hinging). And this motion has no center. None. Thus, the basic characteristic of the Angled Hinge Action is a slicing, uncentered Motion. This means Compression Leakage and "Fore Right!" unless compensated by closing the Clubface at Impact Fix per 2-J-1.
This 'Closing' of the Clubface at Fix will be more with the longer Clubs because the Ball stays on the Face longer. And more time for the 'uncentered, slicing tendency' to be exaggerated.
Finally, there is no Layback with Horizontal Hinging, with or without the Dual Hinge arrangement that permits the Horizontal Hinge Action to be executed as on On-Plane Motion.
_________________
Yoda
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