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Missing the Golf, I know just how you feel, haven't been able
to swing a club in over 12 months now. But I
found out one thing, Life still goes on.
Hang in there Buddy, if the Doc says 2 or even three weeks think of it
this way as a winter lay over.
RK
Manufacturer's of World Class Golf Club Repair
Equipment
-------Original Message-------
Date: Friday, July 05,
2002 12:15:33 AM
Subject: Re: ShopTalk:
Time out and a new way to match shafts
Dave,
> Hi, Bernie!
> How are you coming
along? Hope all is going well with the healing.
Am healing up as OK
as possible with a 6" tube coming out of my gut. Lots of
minor pains
but nothing serious. Am kind of anxious to start the nightly
dialysis
routine, so I can get some strength back....maybe next week, since
it
takes two weeks to heal up before use, I've been told. Miss the
golf
already.
> A couple of things about your
note...
>
> (Copy to Dan Neubecker, since I'm asking questions
about the NF2.)
> > I have Dan's NF2 shaft matching machine to
play with.
> > What a neat device! So simple to use once I saw
how it
> > works. Set beam length, measure deflection per
inch,
> > figure target deflections, snap in a shaft, mark
NBP,
> > slide shaft to target deflection, mark tip and
cut...viola!
> > A perfectly matched set of shafts with your
choice of
> > alignment to boot.
>
> That sounds
remarkably like the FlexMaster approach. I think I mentioned
to
>
Dan that was a possibility, but I hardly thought that it was that
far
along.
> How do you determine a target deflection?
Dan
could probably explain this better than I, since I haven't done it
very
often. But, since I assume you have an idea how the NF2 is
constructed, I'll
give it a shot.
To find tip sensitivity, set
the shaft tip at 0" (against the tip stop). Set
beam length to
accommodate about 5" of butt movement. Put the shaft in the
bearings
under flex and it swings to the NBP. Take and record a
deflection
reading from the dial indicator. Slide the shaft so 1" is
beyond the tip
stop. Record the reading. Repeat for a couple more times
and average the
difference between deflection readings....to get the
tip
sensitivity/inch...say .030/inch
Matching a set of shafts,
select the softest shaft for the longest club (or
just use any one) and
record the deflection at its trim length....say a
3-iron shaft with a
deflection number like .500". If the manufacturer
recommends a 1/2"
slope for that shaft between clubs, add half the tip
sensitivity to the
longest shaft deflection...that's the 4-iron target
deflection of
.515". Five-iron would be .530, etc.
The easy part is the marking
for trimming...just snap in a shaft, it
automatically settles on the
NBP, slide the tip beyond the tip stop until
the dial indicator reads
the target deflection, press the tip stop against
the shaft and rotate
the shaft to score the exact cut line.
I can see already that some
"hazards" exist in this operation (as there are
with a frequency
analyzer, gram scale or any other sensitive
instrument)...the dial
indicator is pretty sensitive to any change or
movement, so shaft
handling care is needed. The beam length needs to be
locked down
tightly so it won't creep. I rotate the shaft whenever I move it
to be
sure it's seated on the NBP solidly. I lift the feeler and set
it
gently on the rotator board to be sure the dial indicator is free.
And I tap
the shaft with my finger a couple of times before I take a
reading. With
care, I can get repeat readings within a thousandth or
two.
> I have some ideas about how to go
> between
frequency and deflection, but apparently someone has
already
worked
> this one out.
Not having a frequency
analyzer or much talent for mathematics, I'd be glad
to hear how you
figure one from the other, if that's what you mean.
With healing
time on my hands, and while waiting for two sets of irons to
arrive,
I've been playing with the NF2 to see if there's some shaft
"signature"
that I can identify as the profile of a graphite wood shaft I
can hit
well. To do this, I've taken six different shafts from an L to an
S,
with three different lengths from five manufacturers and taken
deflection
readings each inch for 10 inches from the tip (moving beam
length from 44"
to 36"). Then I graphed the results. Kind of
interesting, but I really don't
know what I'm looking for. Noticed the
L and R from the same manufacturer
have a similar curve, while the
others all have different curves, so maybe
there's something to it.
It's very obvious where each parallel tip ends.
And, the shafts that
feel good to me all have a steep slope to the curve,
while the ones
that don't feel good to me are kind of flat.
> BTW, "viola"? I
guess you're taking up a musical instrument during your
time
>
out. :-) Actually, that's my all-time favorite Internet
misspelling,
> especially since I used to see it a lot on the
musicians' newsgroups when
I
> hung out there in the '80s and
early '90s.
Shoot, that's not my only misspelling when I type with
two fingers that
aren't connected to the brain. You ought to see all
the ones I fixed. Will
"presto" do? :-)
Bernie
Writeto: [EMAIL PROTECTED]
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