[Daryl]

The D Plane is a term for the plane connecting two impact vectors. It is not an analytical model. Hence, The D Plane doesn't "assume" anything.

The book clearly identifies only Horizontal Hinge Action as the ideal application of linear force, producing perfect vector alignments.

And for the record, an arched left wrist, or its equivalent, would produce more compression than The Flat Left Wrist, or its equivalent. This would, of course, "hood" the clubface, which the book suggests to avoid. Although, virtually all great ball-strikers do it.

It's clear that you have NO grasp of "compression", the "line of compression" or "sustaining the line of compression". You said: "And for the record, an arched left wrist, or its equivalent, would produce more compression than The Flat Left Wrist, or its equivalent." Are you delirious?


Furthermore, you don't have a grasp of your own beliefs. Have you read page 80 of your Bible: "The Physics of Golf"? it says:

The Ball Slides and Rolls on the Clubface

We shall finally consider the effect of this sliding friction between the ball and the clubface. When the clubhead begins to make contact with the ball, the ball will begin to slide up the clubface, with the force between the ball and the clubface gradually increasing. The resulting frictional force on the ball will gradually give the ball a rolling motion, and when the ball is about to leave the clubface, the ball will be rolling without sliding if there has been enough friction.

Duh? "Slide, then Roll" Duh?