Also: d = diameter of core D = the overall string diameter with the wrap. David Love www.davidlovepianos.com From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of David Love Sent: Friday, May 29, 2009 8:50 AM To: pianotech at ptg.org Subject: Re: [pianotech] Modified L Scale with 5 note transition Let’s try this again in HTML for better spacing. David Love www.davidlovepianos.com N = number of strings in unison B = the weighting factor of the wrap (.89 for copper), iron and aluminum have different weighting factors L = speaking length T = tension in lbs f = in Roberts the fractional elongation of the string under tension (the core gets a bit thinner) not sure what it means to Hayes ^ indicates raised to the power that follows that symbol. David Love www.davidlovepianos.com -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Gene Nelson Sent: Friday, May 29, 2009 8:22 AM To: pianotech at ptg.org Subject: Re: [pianotech] Modified L Scale with 5 note transition Here are the two versions I'm aware of: Z=(d²NLf)/.02078 published by Jim Hayes Z=d(NT(1+B))^0.5 published by Dave Roberts Sorry but would you please fill in the unknowns for me. d=diameter N=? please tell me L=length f=frequency T=tension B=? pleas tell me ^ = please tell me Thanks so much. Gene -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20090529/712c6715/attachment.htm>
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