Comparing to Flightscope Trajectory Optimizer

[HTTR]

So some of you know may know this cool tool by flightscope, basically its a optimal ball flight trajectory tool, but basically my question was does anyone know which values to put where if inputting some SkyTrak data? I'm getting my shots going the opposite direction when inputting though I'm definitely putting a wrong value in the wrong spot

http://flightscope.com/products/trajectory-optimizer/

[mhage]

Here is my stab at it. Numbers are a bit longer and a little closer to what i actually hit with my 7 iron. I put in the back spin and adjusted the spin axis until the side spin matched.

This is from SkyTrak

17

107

91

26.2

8048

-345

138

140

-7

[keithpbz]

Is that a 7 iron?

[mhage]

yeah, that was a 7 iron. I think the LA and spin are reported a little high. My unit may not be level. If I put the numbers into FTO and reduce the spin I see closer to what I see on the course.

[keithpbz]

Seems really high. I'm Around 17-18 degrees and 7100 spin and 106-107 ball speed. I play my 7 iron 153 yards.

[TorchRedRob]

Swap the skytrak to spin axis in the settings and you'll get numbers that you can directly enter into fto. Backspin is one component of total spin, and will always be less than total spin, unless you have 0 side spin/side axis

[mhage]

Unfortunately, once the data is synced to SkyGolf360 it reverts back to back and side spin and you lose horizontal angle

[mhage]

Yeah, I'm still trying to figure that out. I hit my 7 between 155-160 on the course. I've never hit one 130 like SkyTrak is showing. I tried my old Taylormade 09' Burner 7 iron which used to hit 175-180 (I know fake loft + longer shaft) and it is only hitting 143 on SkyTrak.

Seems really high. I'm Around 17-18 degrees and 7100 spin and 106-107 ball speed. I play my 7 iron 153 yards.

[Ronsc1985]

You can easily convert the numbers back and forth. Total spin is the vector sum of back and side spin. Think of a right triangle with the sides being side and back spin and the hypotenuse being the total spin.

So if you know total spin and side spin then the spin axis is the arcsin of side spin/total spin.

If you know the total spin and back spin then the spin axis is arccos of backspin/total spin.

If you know the side spin and the backspin then the spin axis is the arctan of side spin/backspin.

Knowing any of the two spins you can solve for the third by screwing around with the equation (total spin)^2=(side spin)^2+(back spin)^2.