Homer Kelley in regard to the initial direction of the ball and the old ball flight rules;

"My contention is that it (the ball) leaves the clubFACE vertical to the leading edge and vertical to the clubface, close enough so that a guy out on the golf course doesn't have to have any kind of gadget for measuring degrees............
This book is not written with those people in mind, its written for the guy standing there who can set the ball up and be reasonably sure its going to separate there in that manner."

I had to come back as I read we attacked somebody and left them for dead. Can't find any bodies and don't see anybody hurt... Oh well, I'm sure CSI will be here soon... :)

Kevin

Still don't see where HK explained the need to alter setup based on the low point and true path. Nor do I see where it is explained about higher lofts creating less angle to the spin axis.

I think Lynn is right though that HK probably would have embraced the D-Plane. He just didn't think of it at the time and it seems he accounted for the fact that there would be more technology and more interpretations that make for clearer descriptions.

Maybe lucky for us. I think Homer Kelley would have had so much fun playing with the new technology he wouldn't have taken the time to write the book. The proverbial kid in the candy store. :)

Kevin

Low Point is not defined by the Distance between the Clubhead and Left Shoulder or any other part of your Body. If that were the case, then Low Point would be at Full Extension when Both Arms are straight and the Left Wrist is fully Uncocked. For an On-Plane Swing and Level Left Wrist at Impact, without Bobbing or Swaying, the Point at which the Clubhead begins leaving the ground will always be about opposite your Left Shoulder. Hence - "Low Point".

Higher lofted clubs produce less side spin because the Downward line of compression is greater than the sideways line of Compression. Read 2-A.

What would Homer think about the "D-Plane". In "Public" he would have said "oh, that silly thing". Then in "Private", he would have laughed his ass off. I give him credit for having an honest sense of humor. :)

My, look at that Ball Rolling up the Face of the Clubhead in Frame 2. Does anyone believe that the Ball "Rolling up the Face" of an inclined striker accounts for all of the Spin creating Force on a Golf Ball? No, I didn't think so. Only Jorgensen thought so, and he's a Physicist.

Bold by Daryl

9 Iron

More physics
 

I must now ask you to include the gear effect. Be modern in all elements.

HB

I'm not a scientist. I only stayed at a Holiday inn. But I can copy from Dave T. http://www.tutelman.com/golf/design/...p?ref=#grooves

Daryl, you gotta type Dr. David Tutelman... then you sound smarter like them other scientists who are now going to pee in your lucky charms...

Kevin

Who precisely are you arguing with here because I NEVER defined where low point was. But if you were to ask me I'd say it's wherever the lowest point is that the clubhead reaches along the arc. Seems to me you can still be pulling the club upward before full extension happens.

But D-Plane offers a DIFFERENT explination. Simply that the axis of the spin rotation will be flatter since the loft angles the tragectory more upwards. D-plane deals with this in geometrical terms that accurately describe what we see.

You sure seem to like putting words in his mouth. Again, I like Lynn's response better. He would have probably expanded on the D-Plan had he known about it instead of pooh poohing it just cause it wasn't his. That is unless you think HK was a real arrogant SOB.