Mike Spalding Your comment: "At a given length and frequency, the percentage breaking strength of the steel wire is constant."!!!!!!!' I hate to tell you this, but, it's not! Here is the approximate breaking strengths of piano wire: .030" : 240 .031" : 260 .032" : 276 .033" : 280 .034" : 295 .035" : 310 .036" : 320 .037" : 345 .038" : 365 .039" : 380 .040" : 390 .041" : 415 .042" : 420 .043" : 450 .044" : 470 .045" : 490 .046" : 505 .047" : 530 .048" : 550 .049" : 570 .050" : 590 .051" : 610 .052" : 635 .053" : 655 .054" : 675 .055" : 700 .056" : 725 .057" : 750 .058" : 775 .059" : 800 .060" : 825 .061" : 850 .062" : 875 .063" : 920 If you can find a constant here, I'd really like to know about it! These numbers were derived from an olde "scale data sheet" that I got from Del, years ago. Granted, each wire manufacturer will have different but similar figures, but a constant there aint, IMHO. Unless you are referring to each given wire size. And, that is assuming that the manufacturing process is absolutely constant. (NOT) Best Regards, Joe Garrett, RPT, (Oregon) Been There, Didn't Like It, So I'm Here To Stay! [G}
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