string breakage

[Joe And Penny Goss]

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Re: string breakageThe idea that a thinner string is stronger than a =
thicker wire does not seem to follow the laws of physics.
Now if you mean that a thinner wire will sound a higher note with less =
or the same tension, then I would agree to that.

"Thinner is stronger than thicker, but the improvement is minimal for =
high carbon steel music wire".=20

Joe Goss
imatunr@srvinet.com
www.mothergoosetools.com
  ----- Original Message -----=20
  From: Stephen Birkett=20
  To: College and University Technicians=20
  Sent: Thursday, June 24, 2004 1:23 PM
  Subject: Re: string breakage


  Wim asked:
    I have a string that keeps breaking when pulled up to pitch. Should =
I use a thicker string or a thinner string?


  Thinner is stronger than thicker, but the improvement is minimal for =
high carbon steel music wire. There's a discussion about this between me =
and Newton somewhere in the depths of the pianotech archives.


    Should I try a thicker string that will withhold the tension, or a =
thinner string for a higher pitch?


  Both strings will have the same stress for the same scale position, =
but the thinner string is stronger so more able to withstand that same =
stress level.


  I'd check for other factors that are causing the breakage.


  By the way, what is the pitch, speaking length, and wire gage of the =
offending string?


  Stephen
--=20
Dr Stephen Birkett
  Associate Professor
  Department of Systems Design Engineering
  University of Waterloo
  Waterloo, Ontario
  Canada N2L 3G1

  E3 Room 3158
  tel: 519-888-4567 Ext. 3792
  fax: 519-746-4791
  PianoTech Lab Room E3-3160 Ext. 7115
  mailto: sbirkett[at]real.uwaterloo.ca
  http://real.uwaterloo.ca/~sbirkett
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