Thursday, 14 September 2017

Skytrak vs R Motion Part 1

Introduction/Disclaimer:
I did not purchase my R Motion unit, I was asked to use the device and provide feedback to Rapsodo. Getting injured greatly slowed this process down but I have now managed to capture some data and compare it to my Skytrak.

Accurate simulation golf is expensive with the ST marking the current entry point. The R Motion is significantly cheaper and does not measure the ball launch characteristics. It is a clip based system which is attached to the club before the ball is hit.

Can the very affordable R Motion provide sufficiently accurate data to TGC in order to dramatically lower the barrier to entry into simulation golf?
Can it provide additional data which could be used to supplement the highly accurate ball data provided by the ST?

Method:
Within the limitations of my setup I tested by capturing 5 solid shots (not blatant mishits) with multiple clubs. Shots were struck from a soft range mat. Using this mat I have noticed shots launch higher and travel less distance compared to a firmer mat or turf. Spin rates are also higher and less variable than those encountered playing 'real' golf.

R Motion version was 1.3.0
ST version was 2.6.5

The ball used was:
Callaway Chrome Soft

The clubs used were:
PW (45°)
7 Iron (31°)
5 Iron (24°)
3 Iron (19°)

The clip position was measured on each club and the actual lofts were also entered into the R Motion configuration to provide maximum accuracy.

Results and Analysis:
In order to accurately simulate the shot outcome the R Motion needs to capture/calculate the basic launch parameters and I think it does an excellent job.
Ball speed is calculated well. As previously noted fractional mishits reduce ball speed slightly and I think this  explains why the R Motion ballspeed is generally a little higher. Of additional interest are the three shots where I caught the mat first. It wasn't sufficient to drop ball speed drastically but the R Motion could not tell when strike occurred which led to a large difference.

Excellent correlation with ST.



The result of these measurements
The R Motion sets its target line at the start of the takeaway (where the clubface is pointing). Obviously this can vary from the ST target line but in general they show a good correlation.


An aggregated summary:
I think this is impressive. In terms of simulation golf you need to know where the ball would have gone. The R Motion is within 3 yards of the Skytrak for L/R and within 3% of the Skytrak for carry distance.

Source data can be found here.

Conclusion
"Can the very affordable R Motion provide sufficiently accurate data to TGC in order to dramatically lower the barrier to entry into simulation golf?"
I think the above proves it can. I dont think this is a game improvement tool like the Skytrak but it is a simple to use entry point into golf simulation.

"Can it provide additional data which could be used to supplement the highly accurate ball data provided by the ST?"
I hope so and this is what really interests me. In theory data from this (or a Skypro etc) could be merged with the Skytrak data to provide accurate ball and club data. At this point it could become a component of a hugely powerful game improvement tool.

Monday, 4 September 2017

Chrome Soft vs TP5 vs TP5X

Introduction
As previously stated I love the Callaway Chrome Soft and it is my normal ball. My previous testing has suggested (others have concluded similarly) that a premium ball is a premium ball and you should make your selection based on other factors such as cost, feel, colour etc.

The TP5/TP5X balls appear a little different. TM claim they launch higher with lower spin on full shots whilst maintaining the high spin character of a premium ball on shorter shots. If true this is really interesting.

For my skill level I get too much spin with a premium ball which increases the amount of curvature I get. If I could get a ball which exhibits consistently (wet vs dry etc) lower spin with longer shots it might help. An additional benefit of consistently lower spin would be better performance in the wind.

Hypothesis
TM claim the TP5 should launch higher with lower spin on longer shots. The TP5X should launch higher still with even lower spin and increased ball speed. Performance on short shots should be unaffected.

I have recently switched to CF16 irons in an attempt to reduce spin, is it possible the TP5/X balls will exhibit too little spin when paired with these irons?

Method
Within the limitations of my setup I tested by capturing 5 solid shots (not blatant mishits) with each ball and multiple clubs. Shots were struck from a soft range mat. Using this mat I have noticed shots launch higher and travel less distance compared to a firmer mat or turf. Spin rates are also higher and less variable than those encountered playing 'real' golf.

The balls were:
Callaway Chrome Soft
Taylormade TP5
Taylormade TP5X

The clubs were:
60° wedge (goal was a 50 yard pitch)
9 Iron (40°)
7 Iron (31°)
5 Iron (24°)
3 Iron (19°)
Driver (9.5°)

Results and Analysis

Subjective:
Nothing feels as soft as a Chrome Soft but the TP5 is noticeably softer than the X.
The TP5/X balls are also more clicky sounding.
During testing I noticed the TP5 ball initially seemed to get a little 'hairy'. This wore off after a few more shots and all of the balls appear durable. After completing my testing the Chrome Soft is in the best condition although the difference is minor.

Data:

60 Degree Wedge (Target 50 Yards):
Launch Angle was way higher with the TP5/X. I was hitting into a net and the launch angle was so steep I had to move my mat closer to avoid hitting the top!
 Spin rate was lower with the TP5/X, it averaged approx 1000rpm lower.


 9 Iron:
Launch Angle for the TP5 was similar to the chrome soft, but the TP5X launched significantly higher.
 Spin rates comparable.
 Average carry distance slightly longer for TP5/X.

7 Iron:
 Launch angle higher for TP5, higher still for TP5X.
 Spin rate comparable between Chrome Soft and TP5. TP5X substantially lower spinning.
 TP5 peak height > Chrome Soft. TP5X higher still.
 Carry distances similar.

 5 Iron:
 TP5X launches slightly higher.
 TP5 spin rate slightly lower than Chrome Soft. TP5X substantially lower.

 TP5X carry distance higher than Chrome Soft/TP5 by approx 5 yards.

3 Iron:
TP5X ball speed higher.
 TP5X launch angle > TP5.
 TP5/X spin rate < Chrome Soft.

 TP5/X carry distances longer than Chrome Soft.

Driver:
Ball speed highest with TP5X. Better than Chrome Soft by 3mph and TP5 by 2mph.
 Launch Angle highest with Chrome Soft (overridden by strike?)
 Spin rates comparable, controlled by strike.

 TP5X longer than Chrome Soft by 11 yards on average.



Raw data can be found here.


Do the TP5/X launch higher?
Yes, although most surprisingly with a 60deg wedge. In general the X launches higher than the 5.

Do the TP5/X spin less?
Yes, especially in the middle irons? On the 50 yard shots the TP5/X balls had a significantly lower spin rate

Is ball speed higher with the TP5/X
In the case of the X yes, but not by much.


Conclusion
The TP5/X are interesting balls; they actually appear to be doing something differently. They launch higher, spin less and travel slightly further. It is great to see TM taking a different direction with their ball design and I am keen to test these on course in the near future.


Update 07/09/17:
I have now managed to test on course and the results were interesting (and mostly subjective).

  • Off the tee I hit both balls, the TP5X went further on 4 occasions and the Chrome Soft went further on 3. 
  • When the TP5X was longest it tended to be by a greater amount than when the Chrome Soft was longest.
  • On approach shots the TP5X went further on 3 occasions.
  • Both balls appeared to stop equally well (distance between pitch mark and resting place).
  • The TP5X launched and flew visibly higher with iron shots. 
  • The TP5X appeared to be affected less by the wind.
  • The TP5X felt much harder than the Chrome Soft.

Strike is king. I believe the TP5X does behave differently to other premium balls, but fractional mishits vs flushed shots still count more than relatively minor differences between the balls.