[Max Impact]

Supposedly, books used by The PGA of America, in the past, stated, that the Clubhead Path was responsible for the starting direction of the ball's flight. Path was one of 5 "Ball Flight Laws". When folks talk about the so-called "new" Ball Flight Laws, there are referring to this one. Except that the science showing that the ball starts between the Path and Clubface, when the two are not square during collision, is not "new" at all. It was clearly shown in "Search For The Perfect Swing" from 1968.

Also, "Search" did show that a small misalignment from square of the Clubface to Path would create a rather prominent curve. It was clear that the Path direction would have to be aligned farther from the target than the Clubface was misaligned to the Path. But we really didn't know how much. We have a better idea now, thanks to TrackMan. As a general "Rule of Thumb", the Path should be aligned TWICE as far from the Target as the Clubface is misaligned to the Path. MORE when loft is less, like with driver.

TrackMan is wonderful and anyone wanting to learn more should read all of their newsletters on their website. It truly does "locate" the inclined plane. The Plane Line is termed Horizontal Swing Plane and is measured in degrees to the Target Line, which is user-specified. But TrackMan is not the first or only machine to measure Path and Clubface angle. In fact, TM doesn't actually "measure" Clubface, but rather, deduces it from other measured conditions. P3PRO can actually measure Clubface, with Path and Angle of Attack as well, for under a grand. I can tell you what the swing plane is with my V1 video analysis software. But I do want a TrackMan.