Ric- I don't have a formula, but I do have a table with all the breaking strengths of Pure Sound Wire from # 7 through # 25. Would that be helpful? What sizes are you working with? Jurgen Goering Piano Forte Supply (250) 754-2440 info at pianofortesupply.com http://www.pianofortesupply.com On Jan 31, 2007, at 11:00, pianotech-request at ptg.org wrote: > Hi folks I'm looking at how to compensate for use of pure sound wire > in spreadsheets for calculating scales. I have the Tension bit > figured out, but I am unsure of how to deal with breaking tension and > % of that. Roberts gives a simple 0.557*d^1.667 (d in mils) and > result in lbs. This is for steel wire with an average density of 7.85 > gm /cm^3 and an E modulus of 192 kN/mm2 Pure sound has an average > density of 7.87 and an E modulus of 187.5 What I need to know is what > the formula for % breaking strength for pure sound is. > Any help to get out there ? > Cheers > RicB -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: text/enriched Size: 1353 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20070131/4311f31d/attachment.bin
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