Uh, there's a reason I did poorly in math........... But I know some folks who can tear this apart step by step.... thanks lse -----Original Message----- From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of RicB Sent: Sunday, April 29, 2007 3:58 PM To: caut at ptg.org Subject: [CAUT] Wire Stretch I just posted a link to a such an approach. In the end its quite easy. You first find the change in tension a give change in deflection yields, and then you have all you need to use standard frequency formulas. Delta T = ES (Delta L / L). Then calculate for the new frequency with your known wire diameter, speaking length and tension and the so called K constant... which in this case is (Pi * string density / 981) f = Sqrt(T/(L^2*d^2 *K) Ok ? Cheers RicB Is there some source or "relatively easy" formula for calculating how much a string must move through a termination point to produce pitch change? I'd like to have some tiny bit of basic information so that in describing pitch corrections of significant distance I can use the information to explain the likelihood that the piano will need a retuning in the near future. thanks les bartlett No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.6.2/779 - Release Date: 04/28/2007 3:32 PM
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