Spurlock shimming method.

[Delwin D Fandrich]

----- Original Message -----
From: "Overs Pianos" <sec@overspianos.com.au>
To: <pianotech@ptg.org>
Sent: May 10, 2001 1:45 PM
Subject: Re: Re: Spurlock shimming method.


> >Even suitably dense timbers undergo compression set.
>
> Agreed, but a proper choice of wood strength (density) and sectional
> sizes with suitable bracing may well reduce compression set to
> virtually zero in the belly rail, while on the other hand nothing
> could prevent compression set in a sound board panel.
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Exactly. And both the foundation for the arch and the material the arch is
made of must both be exceptionally rigid for the thing to work. Or the
radius of the arch must be very small, indeed. Hence, my assertion that this
is not part of the mechanism that either forms or sustains crown in the
piano soundboard assembly.

Del