Which brings us to...
Let's think about how Harrison is likely to get that very torsionally stiff shaft. Since most of the twist is in the small-diameter tip, they probably really beef up the tip. So there's a lot of reinforcement in the tip. Sure, that reduces the twist, but it also makes the tip section a lot stronger. That's added strength where he's breaking it.
So a low-torsion shaft (or at least MOST low-torsion shafts) will probably do the trick for you. But it's not necessarily because of the torsional stiffness, nor because the failure is in torsion (though it may be). It's because the way to make a shaft torsionally stiff is to make the tip very strong and stable overall.
Cheers! DaveT
At 03:52 PM 7/25/03 -0400, [EMAIL PROTECTED] wrote:
He had a Harrison 1.8 in 1 of his drivers and it lasted longer then the Harrison 2.5's that he prefers. It very well could be torsional stress that is causing all the breaking.
-----Original Message----- From: Dave Tutelman [mailto:[EMAIL PROTECTED] Sent: Friday, July 25, 2003 2:36 PM To: [EMAIL PROTECTED] Subject: Re: ShopTalk: Epoxy for LDC Pro's
At 09:34 AM 7/25/03 -0400, [EMAIL PROTECTED] wrote: >...He has a swing >speed of 152 mph and has to carry a persimmon, steel shafted drive in his >bag incase he breaks both long drivers he has in the bag. I would assume >he's SOL until he finds a shaft with enough torque to keep the shaft from >breaking, but not too much torque where it effects his ball flight.
I guess I'm having trouble understanding this, though it may be OK. My questions:
(1) What do you mean by "enough torque"? It sounds like you mean a shaft with a "torque" rating higher than some number (like 3.5 degrees), but I'm not sure.
(2) If that's what you mean by "enough torque", why should that have anything to do with breaking shafts? My own reasoning would be: - Maybe the shafts are breaking from torsion stress and maybe not. Bending stress? Shearing stress? I suspect both are at least as likely as torsional stress. - Even if it is torsional stress, I'd expect that torsional STRENGTH, not torsional FLEXIBILITY, would be the key. Why would you expect torsional flexibility to prevent breakage?
Thanks, DaveT
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