Mother in Law of All Cutoff Bars

[James Grebe]

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Without ways of building on each others trials and errors they followed =
more of a purposeful trek in a given direction until they exhausted it.
James Grebe ,=20
 Piano Tuner-Technician, Wood Artisan    =20
new website WWW.JamesGrebe.com

  ----- Original Message -----=20
  From: Phillip Ford=20
  To: Pianotech=20
  Sent: Friday, August 29, 2003 3:11 PM
  Subject: Re: Mother in Law of All Cutoff Bars


  >
  >Thanks for the pictures.
  >
  >What were these builders trying to do? Were they each single handedly
  >trying to use up all of the iron in the whole of the Mesabi Range?

  Maybe they owned stock in a mining company.

  >
  >Have you any idea what that plate might weigh?

  No.  Fortunately I wasn't around when they took it out (although I=20
  would have liked to see it after the fact).

  >  I've been giving some
  >thought of late to the amount of iron in even the typical piano plate
  >(leave off something like this). Much of it is a total waste having =
no
  >structural or acoustical function whatsoever....
  >
  >Del

  One of the interesting things about this plate is that in spite of=20
  all the metal they put at the tuning pin end, it's fairly light at=20
  the hitch pin end.  The struts are heavy, but the plate web in=20
  between looks like it might be fairly flexible.  For the strings at=20
  the midspan between the struts, I would think that there might be a=20
  fair bit of deflection at the hitch pin end as they are pulled up to=20
  pitch.
  I haven't really thought about it before, but I wonder if this could=20
  be a way to attempt to build in some tuning stability.  The humidity=20
  increases, the soundboard moves up, the string tension increases, but=20
  because the plate or string connection to the plate is fairly=20
  flexible, the tension won't increase as much as for a rigid plate or=20
  connection.  I don't know how flexible things would have to be to=20
  make this work (if it would) or how that would affect the tone.=20
  Also, if you were counting on plate flexibility for this effect, you=20
  wouldn't get any at the plate struts.
  Too bad we don't know more about what these guys were thinking.

  Phil Ford

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