Howard Jones, on 23 April 2012 - 03:35 PM, said:
im sorry but you dont seems to understand me, or we are talking over each others head here.
YES spin raise if launch does ON THIS shaft, but the question was could 2 different shaft go different ways, one launching higher, but with less spin than the other
You will also see from this example that launch is raising much more than spin is in this 2 shots, and thats because this shaft eats spin.
If loft is 13, and AOA is 0 then launch should be 13, but its more than 16. The difference in launch is provided from the shaft, who adds dynamic loft
You said it yourself, you are not sure how i get that low spin from a loft of 13* , so could it be the shaft ? Yes it is.( and the next to neutral path to the ball)
Spin is NOT needed for distance, its for flight TIME who might give distance, but the more spin you got the less forward movement. We only got 100% power, now we have to use that power right, and if you look at the footprint one more time, you will see that we are still within the laws of physics. By theory we could still add 3-4 yards here to get into the deepest burgundy color
And for the record, its not me who is the player here, im the club fitter. (im a lousy player :-))
If 2 players who both plays DG changes to PX, they will both see higher launch and lower spin vs DG, so the trend will be the same for them both and that cant be denied.
I never saw anybody who was launching PX lower, than comparable DG, and i never saw anybody who spins more with PX vs DG, its always the other way around, so yes we can change shafts, but we cant get exactly the same numbers because we are not swinging the same, but the trend of change will be the same
HowardJones
Even Grafalloy doesn't make the claim that the PFC 50 (which they market as mid to high launch) is a low spin shaft. They don't sell the shaft retail, and the vast majority of golfers seeking the holy grail of high launch/low spin have never heard of the shaft. Which, of course, doesn't mean that it isn't a very, very good product, but if it really had the properties you say, it would lead Grafalloy's marketing. Which it doesn't...
There simply aren't any physics to explain how a shaft can "eat spin". There is lots of science to explain how loft and shafts can increase or decrease launch angles, but on every industry chart the correlation between launch angle and spin rates is direct. Might there be slight differences in spin rates at the same launch angle? Of course, and I'll go as high as 10% +/-; I've seen this with different shafts and the same head on Trackman.
BUT (and this is back to the OP) the impact of two different high launch shafts on spin rates is minimal. For the most part, players with average swing speeds will benefit from a higher loft with a mid launch shaft, which is exactly what you used to fit the individual whose Trackman data you posted.