[O.B.Left]

Strictly my opinion...

D-Plane is a fairly complex examination of the "new" ball flight laws that say the ball starts approx. 85% due to the face direction at separation. For years we were taught that the path was responsible for starting direction. To really take advantage of D-Plane you need to be on a TrackMan to test several variables.

As followers of Homer Kelley, we have it easy and really don't need to change our thinking. Homer Kelley tells us in Chapter 2 -D-0:



We know the ball curves because of a variance in face angle to path.

Thats all I need to know to teach and play G.O.L.F. !

Kevin

Nice one Kev.

"Approx 85% " and Mr Kelley's "practically at right angles to the ..." Do they refer to the same thing?

There is a lot of math given the variables to be more precise Id imagine. I remember a story of Homer discussing this issue and proclaiming that golf should not be played on course with a protractor, not by the guys he was talking to anyways. Which means to me that, for research , practice etc its ok but not something to fret about on the golf course. Heck there were a lot of majors won by guys operating under (and unknowingly compensating for) the old backassward rules , so not fussing over the last 15% seems like good advice. Given enough experience you'll get it accounted for without thinking about it maybe.

I havent given much thought to Dplane. But Id imagine doing the calculations and adjusting the clubface angle by a few degrees or whatever would drive me nuts. Get me thinking about the wrong stuff. Distract me like the guy I got paired up with yesterday that was always telling me where the trouble was..... just as I was getting over the ball. My brother can be a real Earl Woods sometimes. His velcro always seems to give him some trouble too , just prior to Startup, my freakin startup. Hah we stomp around like Seve and Zinger sometimes.