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

Status
Not open for further replies.
B

Brian Manzella

Administrator
I asked Justin Padjen, US Tour Operations and Sales for TrackMan, to do the math and make a chart on the aim/swing differences for various plane angles (VSP=vertical swing plane) and plane lines (HSP=horizontal swing plane) for me to use at the !st GTE Conference in Maryland.

Justin did a great job with the numbers, and like Matt Frelich, PGA Professional
& Head of US Operations for TrackMan, are great representative of the company and the sport of golf.

Here is the chart:

LEGEND:
VSP - Vertical Swing Plane or Plane Angle, in degrees
AA - Angle of Attack, positive numbers are upward, negative are downward
HSP - Horizontal Swing Plane or Plane Line
HSP/AIM for CP = 0 (deg) - How far you have to adjust your "direction of swing" or Plane Line to the left or right to hit it straight. CP is "club path." Of course the clubface must be square. :D

P.S. A dozen free Srixon Top of the Line balls for the person who fgures out the math.

I'll give you this one as a starting point: a Radian is 1.74533°, so for every 1°, at 100 yards, the HSP/AIM for CP "Plane Line Adjustment" needs to be 1.74533 yards whatever way it need to go.

Also, some of the VSPs are purely for explanation purposes, 30 and 80° Plane Angles are not an everyday thing.

conversion.jpg
 
Matt 4-L

Matt 4-L

New
AA * TAN((90-B2)*3.14/180)= HSP/AIM for CP

Length of shot/100 * -1.74533 * HSP = HSP/AIM for CP
 
Last edited:
ggsjpc

ggsjpc

New
You can't just take 1 and divide it by 45 because it is a compound angle. That would only work in the 2d world. In order to make the math come out, we are going to need to know if trackman works with a radius from circle or something else. I think?

I'll be away for a few days so someone else will have to do the math. I think the only way 45 degrees is one to one is if they are using a circle. Just my opinion but as I tilt an ellipse with the flatter bottom I wouldn't get a one to one. Just a guess so who knows. See you in a few days.
 
Last edited:
Matt 4-L

Matt 4-L

New
At 45 we know it is a one to one relationship but the other angles are not so your spreadsheet Jaridyard only works for 45. Trackman measures actually where it is at in space so I am not sure of what type of mathmatical equation is going to be needed.
 
J

jaridyard

New
Matt F. said:
At 45 we know it is a one to one relationship but the other angles are not so your spreadsheet Jaridyard only works for 45. Trackman measures actually where it is at in space so I am not sure of what type of mathmatical equation is going to be needed.
Click to expand...

The vertical swing plane column is there to adjust for this, if we are at 1º out for every 1º down at 45 and 0º out for every 1º down at 90º (dead vertical) every degree in between must shift the path out 0.0222. That's the only difficulty with the spreadsheet entry, deducting VSP from 90, e.g 60º VSP would be -30 etc.

As John has said though the 1 to 1 relationship at 45 is based on a perfect circle, feel free to edit and add to it. It's quite a long time ago I did it and figured it fits in this thread so I'm not precious about it.
 
Last edited:
D

DOCW3

New
Ref: 1.745 yds for every 1 degree at 100 yds.

What we need to know! Was there a post indicating this would be a constant for every iron if ball position is varied?

Ref: a Radian is 1.74533 degrees. ?????
 
Last edited:
N

niblick1

New
When you look at the groupings in a gross way, you'd guess you do aim a little more left for a 3-iron than an 8-iron despite being a little less downward, and if you hit really down on a 3-iron, you better aim really left. Right? This makes the Trackman article make sense, too.
 
S

savydan

New
OK here are the formulas: tan = tangent (from your high school trigonometry class)

Aim Degrees = AA x tan(90-VSP)

Aim Distance = Target Distance x tan(Aim Degrees)

or if you want to calculate the Aim Distance directly:

Aim Distance = Target Distance x tan[AA x tan(90-VSP)]

You should print out the tangent table here:

tangent cotangent trig tables

Brian, you can PM me to get the address for the Srixon's
 
B

benhogan55

New
savydan said:
OK here are the formulas: tan = tangent (from your high school trigonometry class)

Aim Degrees = AA x tan(90-VSP)

Aim Distance = Target Distance x tan(Aim Degrees)

or if you want to calculate the Aim Distance directly:

Aim Distance = Target Distance x tan[AA x tan(90-VSP)]

You should print out the tangent table here:

tangent cotangent trig tables

Brian, you can PM me to get the address for the Srixon's
Click to expand...

How about using a calculator..I didn't know trig tables still exist!
 
Matt 4-L

Matt 4-L

New
I fixed Jaridyard's spreadsheet in excel but don't know how to post it. If anyone wants I can email the excel sheet to them and they can post it if they have a file share account. All you have to do is put the VSP and AA in and the distance of the shot and it calculates the aim for you.
 
S

softconsult

New
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.
 
S

savydan

New
Here is an example by hand:

VSP = 50 degrees
AA = 6 degrees
Distance = 250 yards

Figure the degrees to the left or right of the target that you aim.
Enter 90 => 90 (you always do this)
Subtract the VSP (50) => 40
Look up the tangent of 40 degrees => 0.8391
Multiply that by the AA (6) => 5.03
So you would aim 5.03 degrees to the right.

Now find the yardage you would aim to the right
Look up the tangent of 5.03 degrees => 0.0875
Multiply that by the Distance (250) => 21.88
So you would aim 21.88 yards to the right


Notes on using the tangent tables and the formulas:

1. If you have a minus sign - just "carry it through." For example if you multiply by an AA of -6 degrees, let your answer also be negative. This will keep the sign convention as is. In other words, up is positive, down is negative, right is positive, and left is negative. If you look up the tangent of -6 degrees, your answer should be -0.1051 (keep the negative).

2. When you look up a tangent, the first column is the angle exactly. For example, the tangent of 5.0 degrees is 0.0875. The tangent of 5.2 degrees would be in the next column over, or 0.0910. If you have to look up, say, the tangent of 5.5 degrees, you can average 5.4 and 5.6 degrees like this: (0.0945+0.0981)/2 = 0.0963.
 
Last edited:
Status
Not open for further replies.
Top