I am working on a shaft matching concept that is fairly interesting. with the head mounted, I am orienting the shaft to achieve a flat line oscillation on the target line and toe up/down ( spine up) then frequency matching from that position. Has anyone tried using this method? Its a bit tedious but produces a very consistent set.
Hi, Jim.
I guess it's a commentary on something that this is viewed as unique and interesting. It should be basic -- except that you don't really need the head mounted for FLO. From things I learned as an undergraduate engineering student before 1962:
* The true spine and NBP (that is, the stiffest and softest directions of the shaft) are given by the high-frequency and low-frequency FLO.
* The true spine and NBP are 90* away from one another, so you should be able to FLO in both the target plane and heel-toe plane.
* You will get the same orientation for FLO whether you use a tip weight or a clubhead. (The same does not go for the actual frequency matching.)
These are things I've been saying for years -- long before I believed there was any value to spine orientation.
I guess the more interesting questions for your process are:
(1) Do you put the stiffer FLO in the target plane or heel-toe plane?
(2) Which plane do you frequency-match? (Note: you can't match both planes in general -- only if the spine is the same "size" in all the shafts.)
(Personal opinion: If it matters at all, the answer to both questions is heel-toe plane. But if it matters, you're probably using a shaft with more spine than it should have.)
Cheers! DaveT
