Need help with Trackman translations

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mgranato

mgranato

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Good info, Steve. I'll have to go back and check out your fitting post.

I went in with the conscience thought of not going all out trying to chase numbers. I don't really have a "full tilt" right now, unfortunately :eek:, but I do some of the things you mentioned. I typically play the ball fairly forward and obviously have a good bit of "up". Always had a high ball flight with the driver. I'm gonna see if I can't get the AoA down some to around 2*-3*.

I'm hoping the consistency will return as I continue to regain some strength, but I'm not too concerned about that right now. However, I am trying to learn how all these numbers interrelate. If I can't get it back, I'd at least like to understand why :).
 
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dannyc

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mgranato said:
Dan, I have no idea. I've been trying to learn what goes into these numbers from the articles in the Trackman Newsletters, but the numbers you referenced don't seem to make sense to me either.

In "Driver 1", hits 1 and 2 had almost identical club path and face angles (CP of -1.4, FA of -2.4 and CP of -1.3, FA of -2.2 respectively) yet hit 1 had -12.8 deg of axis spin while hit 2 had only -3.3 deg.

These are the kind of "oddities" I'm hoping some of the Academy members will weigh in on and be able to explain.
Click to expand...

any thoughts on this trackman pros?
 
ggsjpc

ggsjpc

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dannyc said:
any thoughts on this trackman pros?
Click to expand...

dannyc,

The one with more spin axis was probably hit off the toe and the gear effect caused the additional left spin. When doing these fittings, I would highly recommend some kind of impact spray or something to determine where on the face it was hit.

If worse comes to worst, the operator should know enough to ask you if you hit that one on the toe.
 
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Kevin Shields

Super Moderator
ggsjpc said:
dannyc,

The one with more spin axis was probably hit off the toe and the gear effect caused the additional left spin. When doing these fittings, I would highly recommend some kind of impact spray or something to determine where on the face it was hit.

If worse comes to worst, the operator should know enough to ask you if you hit that one on the toe.
Click to expand...

I dont know how i missed this thread but John is absolutely correct. Totally about impact location. You could have had spin axis positive if you heel-ed it with that closed face.
 
ggsjpc

ggsjpc

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Which do you think?

Kevin Shields said:
I dont know how i missed this thread but John is absolutely correct. Totally about impact location. You could have had spin axis positive if you heel-ed it with that closed face.
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Kevin, based on your experience with trackman, do you think one was a toe hit or a heel hit?

I don't know the ratios well enough to estimate spin axis based on the solid hit so I guessed the one with more was a toe hit but it absolutely could have been a heel hit for the less tilt.

As i look at them again, I think it makes more sense that it was a heel hit that produced the less tilt and a very noticebale heel hit on the 3rd shot. I think if it was a toe hit with that horizontal launch, it would have gone way left. Am I seeing this correctly?
 
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savydan

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Do toe and heel hits generally produce smash factors of 1.50 ??

Out of 12 swings, the only two smash factors recorded were 1.49 and 1.50.

If he was alternating between toe hits, heel hits and sweet spot hits, would you not see a higher variability in the Smash Factor?
 
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softconsult

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That's a good question. I understand that 1.50 is as good as it gets. Mine was 1.43!
Suspect it may have to do with his Angle of Attack being up at 5 or 6 degrees.
 
mgranato

mgranato

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savydan said:
Do toe and heel hits generally produce smash factors of 1.50 ??

Out of 12 swings, the only two smash factors recorded were 1.49 and 1.50.

If he was alternating between toe hits, heel hits and sweet spot hits, would you not see a higher variability in the Smash Factor?
Click to expand...

Since my session I've been doing some research and was able to talk to an experienced T-man tech about this topic. The way I understand it is like this - T-man cannot determine between center hits and "near" center hits. Add to that the fact that the highest ball speeds will be towards the toe (1/2" - 3/4") and low (1/4") on the face, T-man can be "tricked" with respect to smash factor. The give-away is usually these "odd" spin numbers. According to the impact tape, my shots with these drivers were from the "center", but they weren't on top of one another.

Away from the launch params, I'd like to learn more about these swing numbers and how close or far they are from neutral.

Is an AoA between 5*-6* too much up?
 
K

Kevin Shields

Super Moderator
ggsjpc said:
Kevin, based on your experience with trackman, do you think one was a toe hit or a heel hit?

I don't know the ratios well enough to estimate spin axis based on the solid hit so I guessed the one with more was a toe hit but it absolutely could have been a heel hit for the less tilt.

As i look at them again, I think it makes more sense that it was a heel hit that produced the less tilt and a very noticebale heel hit on the 3rd shot. I think if it was a toe hit with that horizontal launch, it would have gone way left. Am I seeing this correctly?
Click to expand...

I didnt look at the entire sheet to notice horizontal launch but you could be right of course. Ill take a peak cuz now im interested myself
 
K

Kevin Shields

Super Moderator
savydan said:
Do toe and heel hits generally produce smash factors of 1.50 ??

Out of 12 swings, the only two smash factors recorded were 1.49 and 1.50.

If he was alternating between toe hits, heel hits and sweet spot hits, would you not see a higher variability in the Smash Factor?
Click to expand...

Heel hits have low smash factor but some toe hits can come up with 1.50
 
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