FLO'ing of shaft and frequancy

[GolflLab]

I just flo'ed my Cobra driver (440) and it went from 243 cpm to 235 cpm. Is this normal? How does flo'ing effect the shaft frequancy? :help:

[Weirfan]

I am assuming that you did nothing to the length of the club , head weight of the club and you did the cpm reading with the grip off, or if you used the grip on it was the exact same grip.

while an 8 cpm variation around a shaft is a fair bit it is not out of the realm of possible and using a 5 inch clamp and the Kaufman scale it represents only about 2/3 of a flex.

It is quite likely that in the first orientation that the shafts spine was oriented towards the target and this is typically the stiffest plane......it is also the plane that will result in the most inconsistent return of the face to square


It is also one of a number of factors why people who hit a demo or friends driver with said shaft in it and love it then go to buy one and find that they cannot hit it the same .... there are very few shaft companies that make shafts with tight consistencies within and between shafts....Mercury was likely the best at it but they closed down two years ago....SK Fiber is darn good......as is Rapport....most of the rest are very inconsistent

[dekker]

I'm inclined to agree with Weirfan analysis. Your initial clubface/shaft alignment must have been with the major spine(S1) at 9 o'clock, and after flo'ing it was likely reset at 12 with S2 at 6. (that would help account for a lower frequency)
The most stable alignment is usually with spines at 12-6 and NBP's at 9-3

Flo'ing is just fine tuning this standart by a few degrees till the clubface oscillates perfectly in line with the shaft.

[Tintin]

http://www.csfa.com/techframe.htm

Spine Alignment
NOTE 22: I tried another spine alignment test with some interesting results. A number of clubmakers recently reported very good results with very poor shafts when the spine was properly aligned. These shafts had frequency variations of up to 15 cpm! I checked with my local shaft purveyor and tried to buy the crummiest shafts I could find. Unfortunately their worst shafts were pretty good. I sorted through a pile of them and found two that had an eight cpm variation. One had a weak axis of 250 cpm (other axis at 258) and the other a strong axis of 250 cpm (other axis at 242). I built two identical drivers with both 250cpm axes pointed at 9:00. In one case the strong axis was at 9:00 the other the weak axis at 9:00. I tried a blind test and the weak axis at 9:00 was definitely the preferred alignment.