Hi, i am still in the learning phase of shaft analasis and what is a good reliable method of checking torque on a shaft? can you recommend equipment for a low volume work shop? thanks - Jim
-----Original Message----- From: Alan Brooks [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 30, 2003 9:03 PM To: [EMAIL PROTECTED] Subject: Re: ShopTalk: FUJIKURA PRO VISTA 60 Hi, I believe you said that you made the measurement that gave you a torque value of 6.2 with a grip on? If so you aren't that far away from what I would expect. Fujikura list the Torque Value for the Vista Pro 60 as 4.5. Add 1-cpm for the grip (per John), a little for the presence of the head (per Dave T., he's right, it will have an effect, both on the MOI of the mass twisting the shaft and, because it is an offset mass, the dynamics of the shaft as it's twisting), and you are real close to your 6.2. I suggest you are getting what I would expect. Alan Brooks At 10:21 AM 9/30/2003 -0400, you wrote: >Hi all, > Looking back on my notes and checking my readings with Jeff Summits shaft >fitting addendum, my measurements are VERY CLOSE and a good percentage of >the time right on with his results. Those shafts include, Graphite design >YS-6, SK Fiber (all shafts ), Graffalloy Pro Lite 35's, Aldila VX, UST Pro >Force 75,65's etc.. These are finished club measurements. Could it be I >received a bad shaft? Like I stated earlier, this was my first request for a >Fujikura shaft so I have nothing to compare it to, and this shaft addendum >has only the Vist Pro 80 X listed. Anyone have any notes on these shafts? >Pat McGoldrick--On Target Golf >[EMAIL PROTECTED] > >----- Original Message ----- >From: <[EMAIL PROTECTED]> >To: <[EMAIL PROTECTED]> >Sent: Monday, September 29, 2003 4:53 PM >Subject: Re: ShopTalk: FUJIKURA PRO VISTA 60 > > > > JOHN, > > I have always assumed ( and I don't like to assume anything ) that the > > reading I get with or without the head was a true reading.Yes or no? >Should > > I do all my measuring before I A: install the head and B: before I install > > the grip? IMO I would like to know what the finished club would be since > > that is what your trying to accomplish.Yeah? What is the preferred method >of > > using this device? > > Pat McGoldrick--On Target Golf > > [EMAIL PROTECTED] > > > > ----- Original Message ----- > > From: "John Kaufman" <[EMAIL PROTECTED]> > > To: <[EMAIL PROTECTED]> > > Sent: Monday, September 29, 2003 9:29 AM > > Subject: Re: ShopTalk: FUJIKURA PRO VISTA 60 > > > > > > > Hi Dave, > > > I've measured torque with a Club Scout with and without the heads. The >MOI > > > of the head is negligible compared to my torsion arm's MOI. I seen no > > > difference in torque with and without the head. The grip however, due to > > > it's damping will increase the torque reading by just under a degree. > > > Cheers, > > > John K > > > ----- Original Message ----- > > > From: Dave Tutelman <[EMAIL PROTECTED]> > > > To: <[EMAIL PROTECTED]> > > > Sent: Sunday, September 28, 2003 12:30 PM > > > Subject: Re: ShopTalk: FUJIKURA PRO VISTA 60 > > > > > > > > > > At 12:56 PM 9/28/03 -0400, [EMAIL PROTECTED] wrote: > > > > >That torq reading is the finished club. > > > > >Pat McGoldrick--On Target Golf > > > > > > > > Pat, > > > > You say it was the finished club. I assume you mean that, and not the > > cut > > > > shaft. The finished club means the head was mounted when you measured > > it. > > > > > > > > How did you measure that 6.2* torque? In particular, did you use a > > > > frequency (like the Club Scout does) to measure the torque? If you >did, > > > > then the presence of the head in addition to the torque clamp will > > > increase > > > > the moment of inertia -- so the measured torque will be higher than >the > > > > actual torsional flexibility of the shaft. > > > > > > > > So maybe it isn't quite that high a torque. > > > > > > > > Cheers! > > > > DaveT > > > > > > > > > > > > > > > > > > > >
