[KevCarter]

The issue isn't about "Clubface Closing Rates" it's about "Which Plane the Clubface Closing is associated with".

From Release to Both Arms Straight, the Clubface will Close at a very even Rate, regardless whether one uses Angled or Horizontal Hinging. If you want to change the Closing Rate, then change from a Sweep Release to a Snap Release. The Release interval changes the amount of Clubface Closing over a given Clubhead Travel Distance.

Hinging determines whether the Clubface Closes on an Axis perpendicular to the Horizontal Plane or an Axis perpendicular to an Angled Plane.

All of this "Talk" about how much the Clubface needs to close to produce "Straight-Away" Flight Path stems from a lack of understanding of the Hinge Action.

Trackman and D-Plane assume that ALL Closing is performed on an Axis perpendicular to the Angled Plane with the Assumption that the Clubshaft is the Angled Plane. They also assume that the Ball is Low-Point. Hmm? No Divots.

Another Misinterpretation of Hinge Action is that the Clubface needs to close to bring Force in line with the Plane and/or Target Line. The Clubface only needs to close to bring the Force in-line with the Angle of Approach to result in Straight-Away Ball Flight and not tilt the Backspin.

The "Math" will show that a Ball Located 9" behind Low-Point will need about 1/2 degree of closing to bring the Force in-line with the Angle of Approach. The "Push Shot". This 1/2 degree of Closing is a normal amount of Closing and 9" behind Low-Point is about the center of your stance.

If the Ball is Located 1" behind Low-Point the Math numbers dramatically change. 1/5th of a degree. So, it's not the Amount or Rate of Closing.

I locate the Ball 1" behind Low-Point for all Clubs. I use Horizontal Hinging and Align the Plane and Target Lines Parallel. 90% of my shots are perfectly Straight. Poor execution accounts for the other ten percent.

There is an answer I can finally wrap my arms around. Thanks Man!

Basically, the only way the guys promoting TrackMan vs Homer Kelley can really make their science stick, is to eliminate the existence of hinge actions. Hmmm.

Kevin