So, You want numbers? I've got numbers!

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I just completed a Trackman Driver Fitting about 4 hours ago at
Miles of Golf, Ypsilanti, MI. What a superb place. Makes my former
fitting place look absolutely pathetic.

Hadn't picked up club in 2 weeks.
Picked up around 22 yards versus my current driver.
Here are the Trackman numbers for the Driver we settled on.

Swing Speed 100.4
Angle of Attack -1.5
Club Path -1.3
VSP 50.1
HSP -2.6
Spin Loft 16.1
Face Angle 1.5
Ball Speed 144.8
Smash Factor 1.43
Spin Rate 2885 Current Driver 4183
Spin Axis 1.6
Carry 232.5
Side 0.3 yds.
Flight Time 5.73
Landing Angle 34.3
Total Yds 262
Side Yds -1.8

I'm not sure I understand really understand the math, but
a high percentage of the shots were dead straight with pretty
tight dispersion left and right of target line.

What a terrific experience. Light years better than my fitting
3 years ago. Fitter spent over an hour working to get the spin
down. I had expected to stay with Titleist, but we couldn't get
any of the three heads with various shafts to work for me.

Then we found that the Adams Speedline 10.5 killed the spin and the
numbers really improved. We tried the Ping G15 with various heads
and the upgraded Ping shaft. Ping was the winner with a G15 9 degree.
Go figure.

Should have it in 2 - 3 weeks. Can't wait.

so cool! can't wait to have my 1st trackman fitting.
 

Kevin Shields

Super Moderator
Whew! Im glad you can visualize the DPlane without all those friggin' numbers. I was starting to get a stomach ache. Or maybe its just all that chocolate I pilfered from my kids while they were asleep.
 
Calling Mandrin

Whoa! Check out the big brains on everyone. I'm really out of my league on this one!

Kevin, join the crowd, and I suspect we are not alone. I was a MCL graduate in Chemistry and I was lost about 15 posts ago. Glad I minored in Economics instead of Math, I would probably still be my junior year. :(

Perhaps Mandrin will wander into the topic and translate this into Golf For Dummies format.
 

Kevin Shields

Super Moderator
Haha. I know all the reasons behind all this but when dem der numbers start poppin up......i defer to BMan.

(Didnt do to well in Math class back in the day:eek:)
 

Kevin Shields

Super Moderator
Funny you should mention that. Ever since you said that, I feel light headed when I drink one on an empty stomach. I think its gonna have to be a new years resolution thing. But I think I'm committed. Dont want to grow a second head or anything.
 

ggsjpc

New
Brian,

I know you like accuracy and I'm willing to bet a bunch that this data is correct if the swing was a circle. We know it isn't and I'm sure their close but to do the math they had to assume a circle.

FWIW
 

Brian Manzella

Administrator
Brian,

I know you like accuracy and I'm willing to bet a bunch that this data is correct if the swing was a circle. We know it isn't and I'm sure their close but to do the math they had to assume a circle.


Obviously.

But, what are you REALLY trying to say.

My swings didn't look that different did they?

:D
 
Brian,

I know you like accuracy and I'm willing to bet a bunch that this data is correct if the swing was a circle. We know it isn't and I'm sure their close but to do the math they had to assume a circle.

FWIW

If anything the math assumes the clubhead is moving in a straight line. Any arc the clubhead is moving in, the time and distance interval is negligable.

As Brian mentioned a while back, the True Path is shown as a straight line.

My understanding is that Trackman measures speed, spin, directions, etc. The vast majority of the numbers given by Trackman are measured and not calculated anyway. Smash Factor would be one of the calculated numbers coming from two measured speeds.

Note that the limiting factor is the degree of error in Trackman's measuring capabilities.
 
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ggsjpc

New
Obviously.

But, what are you REALLY trying to say.

My swings didn't look that different did they?

:D

This has nothing to do with your swings and no they didn't look that different.

I thought you didn't like information that isn't exactly correct. Whoops.:confused:

If anything the math assumes the clubhead is moving in a straight line. Any arc the clubhead is moving in, the time and distance interval is negligable.

As Brian mentioned a while back, the True Path is shown as a straight line.

My understanding is that Trackman measures speed, spin, directions, etc. The vast majority of the numbers given by Trackman are measured and not calculated anyway. Smash Factor would be one of the calculated numbers coming from two measured speeds.

Note that the limiting factor is the degree of error in Trackman's measuring capabilities.

The straight line part I don't have a problem with.

The problem I have is there is no way you'd get a 1 to 1 relationship at 45 degree vsp unless you're dealing with a circle.

If everyone is clear and ok with that than fine.

If they didn't know, now they do.

I agree that most of the trackman numbers are measured.

That sheet is not measured.

That 1 to 1 relationship is not measured.

No agenda.

Just facts.
 

Brian Manzella

Administrator
I thought you didn't like information that isn't exactly correct. Whoops.:confused:


The problem I have is there is no way you'd get a 1 to 1 relationship at 45 degree vsp unless you're dealing with a circle.

Ok.

Let's say that on a straight base line (Horizontal Swing Plane) the club is moving down (Angle of Attack) 10 degrees on a 45° angle.

The "Math" says that the club would be traveling 10° outward.

Ok.

I say that no matter which way you draw your lines, it is pretty much dead on.

Think about it.

If it were MORE OUT it would be MORE DOWN.

Give me an example of how it could be really wrong.

Don't hurt yourself. ;)
 

ggsjpc

New
Brain is starting to hurt.

Good chance I might be wrong because it's degrees relative to vertical not degrees relative to the shape.

It was the line thing savydan mentioned.

I had a huge long explanation of ellipses and pushing them in the ground and talking about how the angles in the ellipse don't stay the same as you travel around in degree terms.

I went and looked back at the trackman newsletter and it talked about degrees relative to vertical.

So.

At this point I must withdraw, refortify and regroup.

Clobbered on that one.

For me, this is exactly why I do what I do. Now, I have a complete understanding of how trackman works and can visualize drawing a line in 3d space and coming up with these answers.

It is so clear now. I know it's annoying to argue with me all the time but it's very helpful to me.

Thank you.
 
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More distance

Brian,

Gotta give you some props for all the "Trackman, D-plane, Zeroing Out, etc" discussions here of late.

I've always been a bit of a "too-steep AOA" driver of the golf ball and thus a high-spin guy that always searched out the lowest spinning driver, but always with minimal effect on my real-world results. Deep down I knew that, like most things with the golf swing, a low-spin driver was really just a band-aid that wasn't going to fix anything.

It's all pretty logical stuff..... hitting up slightly, aim right, zero things out, but I simply never put much effort into it for fear of messing up the rest of my game. Well, last night I hit about 40 drivers trying to hit up slightly (moving the ball a bit left in my setup), aiming a tad right, paying attention to the forward lean of the shaft, etc, and I could see/feel a difference. It's tough to determine at the range how significant the difference was but today when playing the course it was noticeable. Less spin and a "hotter" ball after it hit the ground equating to longer drives.

I don't understand all the TM stuff yet, but I plan to get much better versed in it.

Thanks,

Rob
 
Just to make certain you're clear about a minor detail....hitting down on a driver wont in itself create more spin.

Kevin,

I know this from the GTE and thread discussion, but what will get more spin? I actually have the reverse of a lot of players with decent club head speed, not enough spin.

Thanks,

Steve
 
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