Buttressed Arch. Question for Ron N.

[Fenton Murray]

I don't KNOW, Ron. But if you keep talking I'll shut up and listen. If my
brain were as flexible as Sitka, I'd be fine.
Thanks,
Fenton
----- Original Message ----- 
From: "Ron Nossaman" <rnossaman at cox.net>
To: "Pianotech List" <pianotech at ptg.org>
Sent: Thursday, April 13, 2006 8:39 PM
Subject: Re: Buttressed Arch. Question for Ron N.


>
>
> > Are you saying that the rise and fall of RH and it's
> > affect on a strung up piano will *not* cause the middle of it's
> > soundboard to rise and fall?
> > Fenton Murray, RPT
>
> Nope, not at all. That has nothing at all to do with an arch,
> and will happen whether a soundboard is glued to a rim or not.
> Try it. Dry down a piece of spruce that's representative of a
> panel (as in the article), glue it to a straight rib, and
> stand back and watch crown form as the panel absorbs humidity
> and expands. Then ask yourself, how can it be an arch with no
> end buttress?
>
> Ron N
>
>