Tension in pounds for steel music wire is given by the formula: T = (d*50.65)^2*(F*L*.00095)^2 where d is diameter in inches, and B is % of breaking strength, F is the frequency in Hz, and L is the speaking length in inches. Breaking strength is typically between 30 and 66%. Typical tensions at A440 are: monochords--200-290 lb.., bichords--160-235 lb.., trichords--140-200 lb.. Choose your numbers and do the math to get tension for any set of parameters. Merry Christmas, Frank Weston - Why yes, I do happen to have a degree in engineering. ---------- > From: BSimon1234 <BSimon1234@aol.com> > To: pianotech@ptg.org > Subject: Approximate tensions? > Date: Monday, December 22, 1997 9:40 PM > > For my own information: > > Average total tension of normal piano at A440 is____?___lbs. > > Average total tension of normal piano when 50 cents low =_____?____ lbs. > > Average total tension of normal piano when 100 cents low=_____?____ lbs.
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