Curved Long Bridges

[Farrell]

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> Agreed, as in Ron's .jpeg. That doesn't prevent the curved tenor end=20
> of the long bridge from showing up in the pianos from famous makers=20
> who should know better.

Ah yes, but herein lies the nut of the matter. The hockey stick end of a =
bridge would only present a complication if one were trying to glue it =
to a new board. Regarding the long bridge, who says we must put back =
what we take out (unless of course the owner dictates - but I would =
argue that might be an indicator of the rebuilder's lack of =
salesmanship!)? This is really for the Del F's and Ron N's of the world =
to comment on, but I think that most pianos with a hockey stick low =
tenor will be improved by rescaling and adding a transition bridge to =
carry the last five or so notes that were previously on the low tenor =
end of the long bridge.

Terry Farrell
 =20
----- Original Message -----=20
From: "Bill Ballard" <yardbird@vermontel.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: Sunday, April 20, 2003 12:06 AM
Subject: Re: Curved Long Bridges


> Ron, Terry,
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> Thanks for straightening me out.
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> At 10:44 PM -0400 4/19/03, Farrell wrote:
> >What on earth is an oeile?
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> As in trompe l'eoile, French for optical illusion.
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> >Most (I think likely all?) well designed piano scales do not have=20
> >any sort of a hockey stick curve at the tenor end of the long=20
> >bridge. It gets fairly straight in that area. The curve to the=20
> >bridge is in one direction only.
>=20
> Agreed, as in Ron's .jpeg. That doesn't prevent the curved tenor end=20
> of the long bridge from showing up in the pianos from famous makers=20
> who should know better.
=20
> >Put the pencil under the middle of the arc, and the mid section of=20
> >the arc lifts up, but the two ends remain in contact with the=20
> >surface of the table or whatever it was laying on.
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> Agreed. Transfer an arc created on the surface of a sphere to a plane=20
> and it will lay flat.
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> >>  I just got finished realizing that any crown in a ribbed board is
> >>  incidental, and not required for support of the string load.
> >
> >Where did this come from? The crown is usually designed in, not =
incidental.
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> My apologize to you both. I meant to say "crown parallel to the grain=20
> of the board".
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> At 10:03 PM -0500 4/19/03, Ron Nossaman wrote:
> >You're assessing all this from the pathological example of your=20
> >bridge sample. Go through it again with the picture of the bridge I=20
> >sent, and it will make more sense.
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> Just as you said. The original long bridge used as a caul/form for my=20
> lamination went into the wood stove long ago, so there's now way of=20
> telling whether my lamination has crept back straight of the last 25=20
> years. But as is, it is still straighter than this Steinway O long=20
> bridge which has a curve at each end, in opposite directions. Which=20
> begs the question, has anybody rescaled the Steinway O (and all their=20
> other scales which have this fault) to produce a straight tenor end=20
> of the long bridge?
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> Thanks for not leaving me out in the middle of the road. Once a Boy=20
> Scout, always a Boy Scout.
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> Bill Ballard RPT
> NH Chapter, P.T.G.
>=20
> "May you work on interesting pianos."
>      ...........Ancient Chinese Proverb
> +++++++++++++++++++++
>=20
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives
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