3Putters - Where Golfers can Unite, Share and Compete
Here is what I have found. If the rolling surface is very hard (like pool table), to get fast natural forward roll expert pool players know that they can hit the ball with a cue stick at 7/10 the ball diameter above he table cloth and there is a very small jump but almost instant forward roll. But with a putt on grass you would drive the ball down into the soft turf and get a jump that results in distance errors. I have high speed video of doing this on a pool table and a putt on grass. As you might know, the golf ball exit or launch angle is mostly due to the face angle and only partially the path of the head.
See http://www.tutelman.com/golf/design/swing2.php?ref=#launch or http://trackman.dk/getmedia/2f6c5cdc-e153-466c-9e1a-f8b612947435/TM... So to make the tradeoff with jump/bounce and getting quick forward roll you need some neg loft
but not too much. Maybe about -1 deg or so.
Depending on ground conditions you might be able to press more since you want to hit the ball
above the 5/10 ball diamater point.
Remember as you move the low point of your swing arc away from the
ball, you increase the dynamic loft, so technique of your swing is key. You can not count on your
low point being your setup address point. If you video your setup and stroke you can see where the
low point is really located. For example, if I setup with the face directly behind the ball, my low point is
about 1.5" before the ball. I have 1 deg of neg static loft at address, shaft is vertical, club face is -1 deg
in reference to the shaft. So I press 1 deg before the backswing to insure
that I will have 1 deg of neg loft at impact.
I have been a fan of negative loft for a while. I first used it on a roll face putter several years ago.
Some people I talk to about loft on a putter insist that it is necessary. The thought is that you want the ball lifted in the air to help get it rolling! They say that negative loft will cause the ball to bounce even more than a controlled loft by driving it into the ground. They feel that the back spin imparted on a ball is not as negative a factor as driving it into the ground. As I watch their stroke it appears to me that they have an unconscious forward press to eliminate the loft, but they argue I'm biased in observing them. I do not agree with them.
As someone that has studied this far more than me, can I get a technical answer to their statement.
Thanks for inviting me to this group, as someone that LOVES to putt and takes it very seriously this is great.