John and Alan any recommendations for good shafts?
Alan Brooks wrote:
Thanks, John, I'm in the 'Buy good shafts and it doesn't matter' camp,
too. But that's my practical side. My analytical side keeps me
asking "Why?"
Alan
At 05:48 PM 12/7/2004 -0700, you wrote:
Hi Alan,
I didn't see any response to your question so I thought I'd give you
my two
cents worth.
Finding these two planes has nothing whatsoever to do with their
"stabililty". I just so happens FLO will occur in these to planes so
they
are easy to identify by the FLOing process. The reason many clubmakers,
myself included, try to align the weak plane in some orientation is to
minimize the shaft's rotation or twisting during the swing. If you
bend a
shaft in anything other than it's weakest plane Mother Nature will
try to
rotate that shaft into its weakest plane. That's what you see when
you bend
a shaft in a spine finder. The problem becomes what plane is the
shaft bent
in during the swing? Unfortunately the shaft rotates during the swing
so who
knows whether the weakest plane is really being bent or not. Some rather
brief tests I ran with some rather bad shafts indicated to me that weak
plane at 3:00/9:00 or 9:00/3:00 (they're the same) worked best. The very
best solution however seems to me to be to just by shafts with very
little
differential stiffness. A max variation of 1 cpm is not uncommon in some
name brand shafts. Aligning these shafts I think is a waste of time.
Cheers,
John K
----- Original Message -----
From: Alan Brooks <[EMAIL PROTECTED]>
To: Shop Talk <[EMAIL PROTECTED]>
Sent: Monday, December 06, 2004 4:24 PM
Subject: ShopTalk: Most stable plane of shaft oscillation
> Hi all,
>
> The question came up recently on Tom Wishon's forum regarding the most
> stable plane of shaft oscillation (if there is such a thing).
Assume a
> simple shaft with more and less stiff bending planes (hence higher and
> lower frequency planes), 90* apart. Is one of these two planes more
stable
> in lateral oscillation than the other? If so, why? Another way of
posing
> the question is if you twang the shaft in a plane half way between
the two
> (at 45* to either) and wait for the shaft oscillations to decay into a
> single plane, which will it be?
>
> Thanks,
>
> Alan Brooks
>
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Jeremy F Ingle
Chief Executive Officer
SPI Consultants
(613) 234-9560 ext 227
