Bob,
I think the point that Harry was making regarding the Braly shafts is,
why not redraw the frequency charts based on 5" clamping? (generally
considered to be the clubmaker's standard). His physical designs can
be measured a million different ways (clamp length, tip weight,
gripped/ungripped, etc), but the shaft doesn't change. Clubmakers
just want/need standard methods for measuring, comparing and
trimming. My guess is he probably came up with his 2.5" just to be
different and "exclusive" and to make it a little more "special".
Also, to make it tougher to compare his shafts to other manufacturer's
in terms of published physical properties or matching.
And regarding his son's club, he said it measured 334 gripped and 343
ungripped
Brad
On Dec 10, 2008, at 12:15 PM, Robert Devino wrote:
Hi Harry
Why not a 5" inch clamp. The BTR shaft is designed by the same guy
that designed the rifle shafts. It is basically his next generation
of rifle shaft but improved in the fact that with the new machinery
he has now he doesn't need to reinforce the tip, so the BTR doesn't
swing weight quite as heavy as a rifle shaft would. All shafts that
Kim Braly designs are designed to be frequencied with a 2.5" clamp
not a 5" clamp. I do use a 5" clamp on other manufacturers shafts.
If you do any work with a Rifle , KB Steel , or a BTR and you don't
use a 2.5" clamp you will not get a shaft to play the way Kim
designed them too. If your using a 5" clamp to build rifles or KB
steels to a rifle chart then your actually building about 20 - 25
cycles to soft. example if you build a rifle shaft to a 6.0 with a
5" clamp your really building something more in the range of a 4.0 .
Grip or grip off is a good question. I did mine with grip off.
Personally I always frequency with grip off becuase for one thing
you can change a clubs frequency by changing what grip they use and
to just have some kind of shop standard I went with grip off for our
builds. Loyd the guy that wrote the program for the FitChip said he
does grip on. But what if the fitting club doesn't have the same
grip as the grip he wants to use ?? This is a personal thing that
varies from builder to builder or fitter to fitter. Like I said we
are experimenting with this thing right now to see if we want to
actually use it or not.
I don't know how a 334 cpm gives you a stiffer flex than a 343 cpm I
am hoping you just have your numbers crossed. But your absolutely
right I had to used a DG X 100 to get there, no way I could get
there with any BTR or Rifle shaft.
Sincerely,
Robert Devino
14252 Delano St.
Van Nuys, Ca. 91401
(818) 770-0475
From: Harry F. Schiestel <[EMAIL PROTECTED]>
To: ShopTalk@mail.msen.com
Sent: Tuesday, December 9, 2008 10:54:22 PM
Subject: ShopTalk: 7-iron at 353 cpm - how?
Hi Robert,
Why do you not use a 5” clamp like most other clubmakers so cpm
numbers can be compared easily? Just curious!
When you specify “"FitChip" fitting it recommend that I be using a
7-iron cycling at 353 cycles using a 5" clamp.”
I have a question … does this stated number assume a grip on or a
grip off?
My son plays a 7-iron at length 36.75. Using 5 inch clamp, it is
343 cpm or 7.9 flex with grip off and 334 cpm or 8.1 flex with grip
on. So basically he is playing the equivalent of a Rifle Flex 8.0 =
XX-Stiff.
What steel shaft would you have to buy to get it to be a XXX-Stiff
flex, which would be close to your stated 353 cpm? I do not think a
DG X-100 tipped will give you this kind of number unless you have an
extremely low swingweight, and many Rifle shafts are sold up to 6.5
flex. Just curious how you build a demo 7-iron with steel shaft at
XXX flex?
Thanks Harry S
www.myGolfDNA.com
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
] On Behalf Of Robert Devino
Sent: Tuesday, December 09, 2008 9:18 PM
To: ShopTalk@mail.msen.com
Subject: Re: ShopTalk: Performance benefits of long drivers
You can put any club in a 1 handicapers hand and they will hit it
just fine in just a few swings. They might not hit it as well as a
well fitted club but they will adjust their swing and hit it
pretty good. Put that long driver in the average golfers hand and
they will loose accuracy for sure. It's just plain harder for them
to get the club around and hit the center of the face. If you doubt
this gt some of your buddys together and some imact tape and go test
it out.
Now Dave your gonna love this. Recently we have started testing the
"FitChip" . Well it's been giving us some pretty interesting
numbers to build for people. First off i personaly play a BTR shaft
designed and manufactured by Kim Braly. It's pretty much his next
version of a rifle shaft. On a rifle scale I hit a 6.0 so my 7
iron's CPM is 310 cycles (thats with a 2.5" clamp that would be
about 335 with a 5" clamp). This being determined by a swing speed
calculation table that we use (commonly used by a lot of fitters).
Any way, after going through a "FitChip" fitting it recomenede that
I be using a 7 iron cycling at 353 cycles using a 5" clamp. Well
we look at the numbers and said your kidding right!!! That's a
board! But because I could I built it and got on launch monitor to
see what numbers came out.
Low and behold, my swing speed, ball speed and distance all went up.
Even when I lived in Colorado I only hit my seven iron about 175
max. Well the flight scope usually shows numbers a little shorter
than reality when used indoors because you only have a short
distance to read the ball with the radar. But it showed me hittng
that club an average of 183 and a number of shots went over 190.
Now conventional thinking would tell you that shouldn't happen but
it did! I have not been the only one that we did this with. But we
have had several people that we tried this with get what would seem
to be really stiff shafts recomended when you comapree it to what
their swing speed would seem to indicate they should be hitting and
they just creem the ball. Doesn't make sense to us yet but you
can't see the results we are getting and not just scartch your head
a bit.
Maybe stiffer is better ????????
Sincerely,
Robert Devino
14252 Delano St .
Van Nuys, Ca. 91401
(818) 770-0475
