Great question Daryl. I'm afraid I have no clue on the answer...

Kevin

I don't come here to learn about "The D Plane" or "modern science". I get that info elsewhere. I came here to better understand what Kelley meant, as I said. The question that I asked to begin this thread was about "maximum compression" and 2-C-1. I guess the kind of answer that I was looking for, which I will provide from my interpretation of the book, would go something like this.....

For maximum compression, the clubface must close, relative to the direction that it is traveling, during the impact interval. This is a horizontal hinge motion of the clubface, and is required to keep the original contact point between clubface and ball intact throughout the interval. Also, the clubface must not "lay back" during the interval, which would add loft, permitting compression to "leak" away.

Now if I were to explain D Plane to a 6th grader, I think I'd go with this.......When the clubface hits the ball, the clubface is moving on a line, and the clubface is also pointing on a line. If you take your pencil and connect those two lines with another line, that new line is called "The D Plane". Not so scary, eh?

One more.....As someone who teaches golf every day to the masses, I can attest that the "new" balls still curve. Sometimes drastically so :laughing1 . Initially, at least

Doggone it if Clampett had just been properly informed that the point of seperation did not determine the direction of flight, he woulda hung onto that eight shot lead and won the open.

Millions have been deceived due to that misconception.:)

In regard to the last bit .......Im trying to picture that. Do you mean one line is arching and the other is straight ish and you connect them at the far ends in a three dimensional drawing? Or are you talking 2D, plan view? Not being a jerk or anything, I really dont know what you mean but it sounds so simple.

In regard to Horizontal its not just any old amount of face "closing relative to the direction it is traveling". The face via the left hand maintains a vertical relationship to the Horizontal Basic Plane , the ground. It can over done or underdone , the identification of the three Basic Planes bringing precision to the execution.

That's petty. Bob Clampett didn't complain about TGM while he was a rising star and winning majors. If the thought of Square Clubface at separation worked for him for all of those years, then why are you saying it didn't afterwords?

I know how to compress the ball to my maximum limit!
 

If I create the greatest possible LAG I am capable of (sensed in any of the PP's), I will be able to compress the ball with that LAG. I'm not saying where the ball will go. Whether I'm Swinging or Hitting, creating, sustaining and applying the LAG is all there is to compression, imho.

Would you like a Dorito, Max? :eyes:

ICT

O.K., thanks. That second bit answers one of my previous questions, which was how much does the clubface rotate during horizontal hinging?

Regarding the other bit, both lines are straight, just like in TGM. My visual explanation was the 2D, on paper, version. For a 3D version, I would say that the two lines are clothes lines in your back yard. If you drape a sheet over the two lines, the sheet is "The D Plane".

Thank you for the lesson on ball flight. Good luck. :salut:

I was only kidding about Clampett. Trying to show the miniscule nature of the difference between compression and point of seperation.

I'm just starting to investigate the D-plane. I actually have found it quite beneficial to my understanding of what's going on through impact and any resulting ball curvature.

I've also found it seems to explain my predominant draw/hook ball flights from the summer. As I've begun to play the ball back of low point (i.e. up plane) and take a divot, I've hit shots that I would have sworn were right down target line/plane line (one and the same for me aligned neutral or square) with club face square that drew/hooked.

Well, d-plane predicts that (maybe TGM, too, but I didn't understand). So, for me, my understanding has increased and I have a better thought as to how to align (swing plane slightly left of target line) to get a straight ball.

Having said that, I still think TGM provides the best "how to" around! As others have said, if Homer was slightly off on the precise nature of the clubhead/ball collision, I don't think that detracts from the practical results of applying the components that put that clubhead into motion.

So, for me, TGM and more precisely Alignment Golf provide the swing mechanics that I want to learn and apply to improve my ball striking and ultimately reduce my scores. The d-plane has helped me at least better understand what is going on through impact (despite what my prior "knowledge" and feel led me to believe) and understand that I HAD made the swing I intended but got results that would have led me to change things I didn't need to change...I just need to work with slight changes to alignment!

Again, as others have said, I think all of golf benefits from the search for a "unified field" theory of the swing. Facts gathered from Track Man (clubhead path, etc., more so than the "predicted" ball flights which should just be observed) need to be incorporated and explained by TGM if we are to be able to continue to expand our knowledge and understanding of the golf swing and resulting ball flights.

Just my 2 cents on the topic...