My follow on topic from Plane Line – Target Line – Line of Flight
The confusion that I have is that many talk about the Plane Line and they are referring to a line that most often resides on the Target Line or Line of Flight. Some write ups have in fact noted that it is not always the same but usually is.
Clearly there is a common theme regarding these statements on the Plane Line.
a. The Plane Line is the base of the Sweet Spot Plane
b. Plane Line is always unless otherwise stated the Sweet Spot Plane Line by ‘herein’ (2-F)
c. Plane Angle is always unless otherwise stated the Sweet Spot Plane Angle by ‘herein’ (2-F)
d. The Club Shaft rotates around the Sweet Spot (2-F)
e. Others stated is that the Impact Line is the Plane Line by ‘herein’ (2-N-0)
f. Tracing of the Plane Line is always to trace the Target Line / Line of Flight when square.
and there are more statements referencing the Plane Line.
It really comes down to the ‘herein’ that has rewritten the entire book for the most part. Not once but twice (2-F and 2-N-0).
This is to say that the sketches in 1-L and 2-C along with the accompanying text and labels are incorrect as written and the reader needs to either ignore the lines and/or draw new lines to match the redefined labels and accompanying text.
In addition, chapters, 7-5, 7-6, 7-7, 10-5, 10-6 and 10-7 need to be rewritten along with any references to the Club Shaft laying flat on the Inclined Plane and the Right Forearm alignment with the Club Shaft. Also the pictures at least in 10-5 if not elsewhere need to redone, they support the Club Shaft laying on the Inclined Plane (which is not the Sweet Spot Plane or Angle) as well as indicating in some cases a Plane Line (which is not close to being the Target Line / Line of Flight).
Clearly that is not a correct interpretation or application. There can be no doubt as with the club shaft that can have only one angle such is the case with longitudinal center of gravity line, the Sweet Spot Plane.
The Sweet Spot Plane and Angle are not the Inclined Plane, Plane Angle or Plane Line. The lack of clear distinction when using Plane Line and Plane Angle is problematic in grasping and understanding the material IMO.
The Inclined Plane Line does not reside on the Target Line / Line of Flight other than to cross it. It is a separate line.
The Plane Line that is so often referred to that resides on the Target Line / Line of Flight unless it crosses it (10-5-D/E) is the Sweet Spot Plane Line. A more accurate description would be Club Head Line. This still permits the Clubface to be aligned to the Target Line / Line of Flight but allows for this line to cross.
In addition several other statements are troubling:
First there is the Imperative #3 – A straight Plane Line. The Inclined Plane is Club Shaft control.
The Club Shaft rotates around the Sweet Spot. Great concept and an argument can be made to prove this, but is actual application this would be in conflict with the statement of the Club Shaft remaining on the face of the flat Inclined Plane. This would also attempt to define the Inclined Plane as one, which has multiple angles, and a bent Plane Line. A quick description of the Club Shaft travel would be from the inside (outward) to the Plane Line as it goes back. Reverse this for going forward till reaching the ball at which point it is the furthest distance from the Plane Line and then moves back out toward the Plane Line. Would kind of look like a very wide ‘V’.
Why is it Homer chose to use a Plane Board and illustrate the Club Shaft travel alone with a Plane Line that doesn’t reside on the Target Line / Line of Plane?
The Sweet Spot Plane and Angle is a valid concept used to describe an imaginary line between the top end and the bottom end of the golf club along the longitudinal center line of gravity.
As I understand it, it is used to define the ‘Feel’, for the express purpose to replace the Club Shaft for sensing and to some extent directing the motion. The Sweet Spot Plane does not replace the Inclined Plane.
I could quote more reference from the book to substantiate my position but I am not sure there is the interest. As I have concluded that the Plane Line lacks context when it is referenced.
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