[BBax]

The D Plane was included in Theodore Jorgensen's book "The Physics of Golf" and for many years was basically overlooked by most. It is an explanation of the effect that the path of the clubhead and clubface have on the flight of the ball. The debate was brought up during a TGM Summit a few years ago with Dr. Aaron Zick. With the explaination he gave it opened up discussion about the old ball flight laws and their validity.