[Thom]

Trackman is measuring the ballflight via radar technology.

Angle of attack, planelines and all other degrees is calculated. They programmed the thing. It doesn't measure the club or clubheads movement through impact.

A couple of years ago, when I visited the Trackman offices here in Denmark and amongst others spoke to the tech wizard and co-inventer there, Frederik Tuxen, he told me he had no knowledge of TGM. But their data confirmed the ballflight theory of Mr. Kelley.

Back to the instruction video : If you can get the ball to go straight with open or closed planelines either this guy is right, or the machine is getting fooled by the ballflight. For example: Trackman doesn't know anything about hinging and what it'll do to the ballflight. So the program will tell you that the only way you could produce this high a ballflight was with an open planeline, even if you actually had a square planeline but was using angled or even vertical hinging. ???

I guess it's just me but I still can't see straight ballflights from closed or open planelines....