[Yoda]

The effect of the hinging has a direct relationship to how fast the door is closing.

Great, Burner. Really great. Thanks.

To the end of the Follow-Through (Both Arms Straight position), Horizontal Hinging has the greatest Clubhead travel, and Vertical Hinging has the least. So, the essential difference in the Hinge Actions is their Rhythm -- Left Arm and Clubshaft together -- as the Clubhead orbits through Impact.

Actually, the Clubhead Door is always uniformly orbiting (about its Center, the Left Shoulder). It is merely a 'ball of steel' serving the same purpose as David's stone whirling toward Goliath.

It is that pesky Clubface Door that gives us so much trouble. As the Clubhead orbits, the Clubface can Close Only, Lay Back Only or simultaneously Close and Lay Back.

So, there are two Centers (2-D-0):

One for the Clubhead; and

One for the Clubface.

Horizontal and Vertical Hinging permit the Clubhead and Clubface to orbit around the same Center (the Left Shoulder, though in dramatically different ways).

Angled Hinging does not. Hence, it produces its characteristic slicing, uncentered Motion.

If you are having a problem visualizing this concept, rest easy. Even Homer Kelley hit the wall here. Ultimately, he built a model, attempting to determine the Center of the Clubhead Orbit with Angled Hinging. His conclusion:

"There is no Center with Angled Hinging."