Just approximate the components based on the manufacturer's specs. using the uncut weight of the shaft Unfortunately there is no way to accurately measure how well you've succeeded, other than counting "tick-tocks". The formul fix does not effect the pendulum length calculation just the MOI calculation which is used for reference.
rocco -----Original Message----- From: owner-shopt...@mail.msen.com [mailto:owner-shopt...@mail.msen.com] On Behalf Of André Cantin Sent: Saturday, January 16, 2010 10:59 AM To: ShopTalk@mail.msen.com Subject: Re: ShopTalk: Equivalent Compound Pendulum Length Matching Thank you. Dave. Your input is always greatly appreciated. I do have some other questions once the formula is fixed. Mostly matching the favourite club. Let's say my favourite club is the 5 iron. In order for me to match the rest of the clubs do I have to take the favourite club apart and weigh the various components and then match the rest of the sets? Or do I just approximate the specs provided by the manufacturer? Or something else? Interesting winter stuff. André. ----- Original Message ----- From: "Dave Tutelman" <dtutel...@optonline.net> To: <ShopTalk@mail.msen.com> Sent: Saturday, January 16, 2010 9:46 AM Subject: Re: ShopTalk: Equivalent Compound Pendulum Length Matching I'll answer André, but first a word to Rocco: I'm pretty sure there's an important error in the spreadsheet. In the formula for MOI, you divide shaft weight by 12. It should be 3. The 12 would be correct if we were looking for the MOI about an axis at the middle of the shaft, not the butt. I haven't played with the spreadsheet enough to know what this does to the match. But I remember reading from someone (John? Rocco?) that pendulum-matching seems to require lots of shaft weight variation. Fixing the error will undoubtedly change that observation; shaft weight should have four times the effect it has now. On to André's question... At 08:28 AM 1/16/2010, André Cantin wrote: >Forgive my ignorance. Are we trying to match column F or Q ? More an inexperience problem than ignorance. Here's how to use the spreadsheet -- once Rocco fixes the error noted above (and perhaps others) and we download it again. (1) You plug in values in columns B, C, D, and E, the dimensions of your club. (2a) If you are pendulum-matching, you tweak the values in B, C, D, and E until you get a match in column F (called Le, or equivalent pendulum length). (2b) If you are MOI-matching, you tweak the values in B, C, D, and E until you get a match in column P. (2c) If you are swingweight-matching, you tweak the values in B, C, D, and E until you get a match in column N or O (two ways of expressing swingweight). IN NO CASE should you enter a number in a column other than A through E. If you do, you will have to re-load the original spreadsheet because you have wiped out a formula. (Probably a good idea to keep around a read-only copy to refresh it, in case you screw up. Don't ask me how I know...) Hope this helps, DaveT -- Shoptalk ** Sponsored by the new Aldila Voodoo. Learn more at http://aldilavoodoo.com/ -- Shoptalk ** Sponsored by the new Aldila Voodoo. Learn more at http://aldilavoodoo.com/ NOTICE OF CONFIDENTIALITY This message, including any prior messages and attachments, may contain advisory, consultative and/or deliberative material, confidential information or privileged communications of the County of Monmouth. Access to this message by anyone other than the sender and the intended recipient(s) is unauthorized. If you are not the intended recipient of this message, any disclosure, copying, distribution or action taken or not taken in reliance on it, without the expressed written consent of the County, is prohibited. If you have received this message in error, you should not save, scan, transmit, print, use or disseminate this message or any information contained in this message in any way and you should promptly delete or destroy this message and all copies of it. Please notify the sender by return e-mail if you have received this message in error. -- Shoptalk ** Sponsored by the new Aldila Voodoo. Learn more at http://aldilavoodoo.com/
