[Daryl]

Thank you for this.

As you may already know TM doesn't assume any rate of closing nor does it assume that the clubshaft is the angled plane as it tracks the centre of the head only and finally it doesn't assume the ball is low point.

If you had a centered hit on those 90% shot, TM would show that you had a planeline a tad left and not parallell to Target Line

Then Trackman would be wrong. Baiting me isn't going to solve the problems with Trackman. Trackman follows the Ball Flight and doesn't need D-Plane theory. But Trackman Calculates Face angle and Loft and it leaves a lot on the Table because it can't reconcile Horizontal Hinge Action. It assumes that the Face stays square to the path, so it does assume a closing rate. Trackman doesn't deal with Low-Point. It Tracks everything from Ball Location, including angle of Attack and Angle of Approach. Otherwise it could easily tell you how far behind or ahead of Low-Point the Ball was Located.

The assumptions are built into their calculations. You aim Trackman at the Target, it doesn't deal with Plane Lines. Trackman wouldn't know the difference between a Clubhead and Bowling ball or if you hit the ball with a Tennis Ball on the end of a String.

It's a calculator with radar. It should sell for $700.00. What would Trackman read if I hit a Plastic Ball? What if I hit a baseball with a long Bat? or a Soccer Ball with a Hockey Stick?

I'm not saying that Trackman is a health issue, I'm just cautioning you to be aware of it's limitations.