Wind.......

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mjstrong

mjstrong

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mjstrong said:
I thought that "spin loft" (the difference between the angle of attack and the delivered loft) WAS a factor of spin. If I'm wrong, please correct my interpretation:

Case 1: Impact with a delivered (Dynamic) loft of 8 degrees, with a positive attack angle of 6 degrees = spin loft of just 2 degrees; relatively low spin rate.

Case 2: Imapct with a delivered (Dynamic) loft of 8 degrees, with a negative attack of 3 degrees = spin loft of 11 degrees; relatively high spin rate.

So, even thought attack angle alone does not affect spin, it's relationship with dynamic loft is...

I think I'm referencing Trackman's January 2008 Newsletter.
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Bump. Jim (or Brian and/or any other Trackman experts), any chance you can help clarify this for me?
Two different attack angles with the same delivered loft at impact will result in two different "spin lofts" and thus result in two different spin rates.

Is that statement incorrect? And if so, how. Thanks!
 
vjsinger

vjsinger

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mjstrong said:
Bump. Jim (or Brian and/or any other Trackman experts), any chance you can help clarify this for me?
Two different attack angles with the same delivered loft at impact will result in two different "spin lofts" and thus result in two different spin rates.

Is that statement incorrect? And if so, how. Thanks!
Click to expand...

+2
 
ggsjpc

ggsjpc

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mjstrong said:
Bump. Jim (or Brian and/or any other Trackman experts), any chance you can help clarify this for me?
Two different attack angles with the same delivered loft at impact will result in two different "spin lofts" and thus result in two different spin rates.

Is that statement incorrect? And if so, how. Thanks!
Click to expand...

I don't think the same delivered loft is part of the equation where aoa effects spin rate.

I think Jim misspoke on that topic.

Attack angle changes launch angle not spin rate.

You are correct in what you said, but the statement that angle of attack doesn't effect spin rate is still correct(assuming same contact on face)

If you have same delivered loft, something else besides attack angle has also changed. That's the difference.
 
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cmartingolf

cmartingolf

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Clubface control and picking the right D-plane.

I agree with Kevin: ride the wind on the tee balls and in most cases work into it on approach shots.

I tend to swing a bit easier when it's windy and focus on hitting shots more square. I hit it pretty square most of the time, but wind tends to effect balance, thus the added attention and easier pass to maintain balance.
 
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dbl

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Jim Kobylinski said:
Answer is in one of the trackman news letters; essentially spin is determined by loft, shaft, and cog of the head regardless of angle of attack.

Meaning if you had the exact same club with same shaft, speed, and loft delivered at impact with one ascending at 2* and the other descending at 2* they'd spin the same.
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Okay, but didn't he have the right idea in that at least the launch angle would be higher or lower for those two strikes?
 
cmartingolf

cmartingolf

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Yes..

dbl said:
Okay, but didn't he have the right idea in that at least the launch angle would be higher or lower for those two strikes?
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While the ball doesn't care about attack angle when it's perched on a tee, launch is a relation to a horizontal plane; the ground. So, if you hit up, you hit it higher, if you hit down, you hit it lower. If you are into the wind...don't hit up;)
 
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twitch127

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While the ball doesn't care about attack angle when it's perched on a tee, launch is a relation to a horizontal plane; the ground. So, if you hit up, you hit it higher, if you hit down, you hit it lower. If you are into the wind...don't hit up
07-09-2009 10:58 PM
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Exactly, you guys are getting carried away with "hitting down" doesn't make any difference. Hitting down lowers the delivered loft which will reduce backspin and reduce drag on the ball. It's a case of preparing to hit down will decrease delivered loft - forget about angle of attack - as brian said "you can hit down and have all sorts of attck angles depending of various factors"
Why has Tom Watson won 5 British Opens - he can hit down a "bunch" when he needs to - and he flushes it everytime ie. centredness of strike.
 
birdie_man

birdie_man

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Jim Kobylinski said:
Answer is in one of the trackman news letters; essentially spin is determined by loft, shaft, and cog of the head regardless of angle of attack.

Meaning if you had the exact same club with same shaft, speed, and loft delivered at impact with one ascending at 2* and the other descending at 2* they'd spin the same.
Click to expand...

If correct that's the best news I've heard in a long time.

Perhaps finally something new about impact that makes for LESS adjusting.

Love it. (?)
 
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