Tom If you are interested in what happens to the club after impact Profiling might help. Butt clamped frequencies describe the first mode of vibration for the cantilever beam which is the way the golf club reacts up to impact. Having said that the 5" clamp length currently used by most club makers as a standard is not necessarily the correct length to be used. My feeling is that a variable Butt clamp length would be more exact as a function of the individuals hand size and grip length but 5" is what we use now.
I did have an opportunity to check out the FitChip System against Tom Stites's Iron Byron. Tom is now Nike's chief club designer but was associated with Nicholas and other OEM's at the time. Using the same swing setup on the Iron Byron throughout the test, when we put the FitChip recommended shaft in the Iron Byron we got 10% more yardage and corrected a slight hook. We then personally tested Tom Stites and got a number for him. Once we got his number, he related to me that he had been trying various club frequencies for a year to find out what he needed, and the number we got is what he had settled on. He recommended that Nicholas Golf use the system but the OEM's can not figure how to work shaft customization into their production system's. llhack > [Original Message] > From: Andre Cantin <[EMAIL PROTECTED]> > To: <ShopTalk@mail.msen.com> > Date: 10/31/2005 7:30:22 AM > Subject: Re: ShopTalk: Looking for an Alternate > > Lloyd. If I understand correctly you are basically saying that shaft > profiling is useless and that butt frequency is the only answer. Do you have > any data regarding your statement below i.e robotic testing and so forth. > André. > > ----- Original Message ----- > From: "Lloyd Hackman" <[EMAIL PROTECTED]> > To: <ShopTalk@mail.msen.com> > Sent: Sunday, October 30, 2005 6:38 PM > Subject: Re: ShopTalk: Looking for an Alternate > > > > > > > *** Butt frequency reflects the response of the shaft in getting back to > > straight and square in the first frequency mode. The shaft is loaded as a > > pure cantilever beam which activates only the first frequency mode of the > > shaft. Now upon impact higher frequency modes may be activated but have no > > affect on hitting or propelling the ball. What you are doing in measuring > > frequency at other points along the shaft is trying to replicate those > > higher frequency modes which are not important until after ball impact. > The > > higher frequency mode may affect feel after impact but that is all. > > > > >
