Piano wire tensile strength

[Erwinspiano@aol.com]

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I think it has to do with the string tension causing the  windings being too 
tight to end up at a correct expansion after stretching to  sing & not sound 
dull. I once had to twist all the tri-chords On an S&S  D 3 times to get em to 
sing. first once wait a week then twice wait a week then  bingo They sounded 
fine but I did not have the oppurtunity to follow up on  it.
  Dale

That's an interesting  observation and well worth researching among string 
makers, i.e. how much  twist of the wire gets ahead of the wrap during the 
high-speed wrapping  process, then how much slackens out of the wire after the 
spinning stops.  Also, how much twist (or torsional force) remains in the core 
held by the wrap  itself (or in mis-making of the string, is the torsional force 
over-applied  leaving the core wire close to an elastic limit).

PR-J 


 

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