John:
Happy Holidays
Even if the shaft rotates during the swing is not the plane just
prior to impact the most important to club head alignment. If you align
the shaft to the club face you will know which plane the shaft is
bending in?
Will still argue that 9:00/3:00 and 3:00/9:00 are not the same.
Don Johnson
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of John Kaufman
Sent: Tuesday, December 07, 2004 6:49 PM
To: [EMAIL PROTECTED]
Subject: Re: ShopTalk: Most stable plane of shaft oscillation
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
>
