jus711, on 11 March 2018 - 12:24 AM, said:
GolfTurkey, on 11 March 2018 - 12:08 AM, said:
Does "truther" mean someone who knows what he's talking about explaining how the ball speed measurement is pretty accurate while CHS is not, which leads to reported smash factors ranging from lower than a PGA tour pro is going to get up to higher than the COR limit?
No ďtrutherĒ is someone speaking matter of factly about things they donít know for sure. I canít say for sure the numbers are accurate no more than you can say for sure theyíre inaccurate, simply by looking at a couple of points of data. We donít know what monitor the Pga uses or how they set it up. What we do know is that he was the fastest 3/4 days at Honda with a 127 and a 128 and fastest today 2 weeks later at a completely different tournament. It doesnít make sense that heís the only one finding the sweet spot on the tee to get the fastest speed all these times. DJ plays a TM driver and so does Rory and they havenít recorder a 128 or 129 this year, and Rory played at Honda and this week on the same tee and monitor that clocked Tiger, he normally swings 120-122 but didnít get a magic bump to the high 120s. Iím willing to accept the numbers are incorrect but why are they consistently coming up incorrect for one guy in one direction? This isnít just one swing. As far as smash factor, Sam Ryder and Pat Perez are a couple of the best ballstrikers on tour, theyíre currently top 10 in GIR, they know how to hit the center of the club face, yet theyíre at the bottom of smash factor numbers for the tour this year and thatís with 30 swings of data. Sam Ryder is averaging 1.43 and Pat Perez is averaging 1.44 and Sam Ryder has a 1.39 in there. Explain all of that to me.
The launch monitor brand is known, it is Trackman.
"Denmark, February 2016 Ė The PGA TOUR and TrackMan have signed their third consecutive 5-year agreement. This (re)signing is a manifestation of a mutually beneficial relationship founded more than a decade ago."
Now let's look at where you need to position the Trackman 4 unit for accurate readings. It's 9 to 10 feet back of the ball and within the width of the unit from left to right, see:
A Trackman unit is 12 inches wide, so players have a one foot window to tee their ball up to get accurate readings. And that's if it isn't angled crazily so that it can cover the whole tee box (as iteachgolf explained to you in the other thread).
The readings of smash factors above 1.5 are obviously wrong, that's above the maximum. Of course Perez having a smash factor of a weekend hacker is also wrong, more evidence that Tiger's CHS is overstated.
You do realise that smash factor is reported too low when CHS is overstated, so Perez having a too low smash is in the same direction as Tiger having a too high CHS? Tiger should have had a ball speed north of 190 by now witb that CHS. 129.2 with 1.5 smash is a 193.8 BS. What is his top BS to date this season, well under 190 AFAIK.
Now just speculating, but guys who often use the edges of tee boxes will probably have more funny readings because they will be further from the optimum position. Tiger shapes it as much as just about anyone and moves around the tee box, and Perez hits a ton of drivers from the left edge of the box like this: