String Spacing on Bridge

[Delwin D Fandrich]

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  -----Original Message-----
  From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]On
Behalf Of Keith Roberts
  Sent: January 25, 2005 6:26 AM
  To: Pianotech
  Subject: Re: String Spacing on Bridge


  I believe part of the reason is the angle of the hammer and the damper
system requires more room at the top. In the treble on an upright the action
spacing always gets closer as soon as the hammers lose their tilt and then
again when the dampers end.

  Also consider the same bridge load carried over the shortened span but I
guess that could be changed with string scales and bridge height. Some
makers extend the bridge so it doesn't end so abruptly, maybe ending it
closer to the rim solves the problem.

  kpiano

What you say is partially true but applies primarily to smaller vertical
pianos. The string angles in grands, even short grands, are not large enough
to require the kind of spreading usually found. This is just one more area
of modern piano design that is open for improvement.

Del

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