|
|
Post by cwdlaw223 on Jan 19, 2012 22:10:13 GMT -5
Now this is good video of impact between a putter and the ball:
|
|
|
|
Post by iacas on Jan 20, 2012 8:35:53 GMT -5
I'm not sure I understand the subject. Are you saying that it's not possible to get forward spin or "overspin" immediately?
From a physics standpoint it seems logical that if your AoA is >> than the face angle overspin is the likely result.
That would require a bit too much manipulation so I instead prefer to have people deliver roughly 1-2 degrees of face loft with 2-4 degrees AoA. It's not a lot of forward spin but it's some.
|
|
|
|
Post by cwdlaw223 on Jan 20, 2012 8:58:00 GMT -5
Instant overspin is IMPOSSIBLE. The ball will skid for a period of time, "catch" and then overspin happens. I agree that some can do it faster than others.
Some putter manufacturers claim instant overspin.
|
|
|
|
Post by Richie3Jack on Jan 20, 2012 9:02:56 GMT -5
Mangum has gone over this and when I got putter fitted for skid, my putter fitter went over this as well. Some companies like Yes! Putters would claim this, but it's because they measure 'skid' in a different way from the standard measurement of skid. I can't remember the specifics, but it has to do with the ball's rotation and companies like Yes! would consider a different point of the ball's rotation to be 'skid' versus 'no skid.' But, most everybody else does not measure skid that way.
So yes, some companies putters have a lower amount of skid due to their face design. We found that with the groove putter faces. Also, weight can be a factor as well.
3JACK
|
|
|
|
Post by cwdlaw223 on Jan 20, 2012 9:29:25 GMT -5
I thought it was nice to see it on video!
|
|
|
|
Post by iacas on Jan 20, 2012 10:16:19 GMT -5
Instant overspin is IMPOSSIBLE. If you define "overspin" as being 1:1 with the linear speed of the ball, then yes, it's virtually impossible with a putter. If you define "overspin" as simply "the opposite of any amount of backspin" (or "> 0 rotational velocity 'forward'") then it's definitely possible. Not to a large degree, but possible. |
|
|
|
Post by cwdlaw223 on Jan 20, 2012 10:38:56 GMT -5
iacas -
Do you use a SAM Puttlab?
Your speaking golf porn to me with all of these numbers!!!!
|
|
|
|
Post by iacas on Jan 20, 2012 10:50:11 GMT -5
Do you use a SAM Puttlab? Your speaking golf porn to me with all of these numbers!!!! Yes, we own and use SAM PuttLab. I'm just asking you to be careful. If you define "overspin" as anything in the forward direction > 0, then it's possible. It may not even be a good stroke that makes it, but it's possible. I too agree that putter manufacturers are selling a line of BS because they drastically over-state how that works. They also tend to overstate how important it is. FWIW I believe a great putting stroke is one with about 1-2 degrees of effective loft and a stroke ascending 2-4 degrees. The maximum putter speed should be reached about an inch before the golf ball. If you can do those things with a face pointing where you want it and a horizontal path pretty darn square to it, you've got a good putting stroke. |
|
|
|
Post by cwdlaw223 on Jan 20, 2012 10:56:39 GMT -5
How is it possible for the ball to have instant overspin (top of ball moving toward the target immediately as opposed to ball itself going towards the target with no forward roll)?
I'm going to get on a SAM Puttlab machine in the Spring. Can't wait.
|
|
|
|
Post by iacas on Jan 20, 2012 11:49:19 GMT -5
How is it possible for the ball to have instant overspin (top of ball moving toward the target immediately as opposed to ball itself going towards the target with no forward roll)? The same way you can hit a topspin shot in tennis. The opposite of the way you get backspin. Gotta go but here: Attachments:
|
|
|
|
Post by cwdlaw223 on Jan 20, 2012 11:51:50 GMT -5
iacas -
You should post more about putting! Good stuff.
|
|
|
|
Post by golfdad on Jan 20, 2012 12:50:00 GMT -5
Hey guys, since SAM only measures data on the putter itself, I don't understand how spin data on the ball is derived.
Short of using a serious camera, the other way I know of is to hit some balls on a green early in the morning to see the track,,,or the dotted line:)
|
|
johngrahamgolf
'88 Apex Redlines
3Jack Top 20 Short Game/Putting Instructor
Posts: 229
|
Post by johngrahamgolf on Jan 20, 2012 21:46:00 GMT -5
|
|
|
|
Post by golfdad on Jan 21, 2012 8:31:40 GMT -5
Those film sequences are interesting, thanks John,
I am curious to know if studies have been done to follow up on this line of thinking, that earlier the roll the better the outcome (aka getting into the hole). In theory, it makes sense the earlier and better the roll, the better the ball maintains its line. But in reality, where is happy medium since hitting up 4 degree with a square face, esp for those with an arched stroke (inside to inside) may not be that easy to be consistent?
|
|
