Hi guys,
I recently got my copy of Sean Fister's new book on long drive. There was some information contained in the 'Equipment' section that I found quite interesting. Sean states that the shaft frequencies of his 2005 WLDC winning drivers were 250 cpm and 251 cpm and that 'they're so stiff that the average guy couldn't even get them airborne' (p.127). However, in Jeff Summitt's manual 'The Modern Guide to Shaft Fitting', a 250 cpm shaft comes out at little more than an A-flex or R-flex. The full shaft cpm ratings are as follows: 2000 Shaft Frequency Averages for Graphite Shafts (tested at playing length 43", shaft cut to 41.375"): A - 240 cpm R - 254 cpm S - 267 cpm X - 278 cpm My question is: Why are long drive shafts rated so highly (XX, XXX, etc.) when their frequencies are so low? Is it because when these shafts are trimmed to the length of a normal driver they would be rated as XX, XXX, etc.? If so, how does shaft frequency change when you butt trim and/or tip trim? Is there a ball-park figure of cpm increase per inch of tip/butt trim? Your input and feedback would be very welcome. Best wishes, Paul Paul Glazier Long Drive Professional & Sport Scientist Dartmouth Golf & Country Club, Blackawton, Totnes, Devon, TQ9 7DE Skype: paul.glazier http://www.longdrivegolf.co.uk <http://www.longdrivegolf.co.uk/> http://www.dgcc.co.uk/longdrive.htm
