ribs and stuff (was alternatives.)

[Newton Hunt]

Hi Del,

Then what happens when there is negative crown on one side of the bridge and
positive crown on the other side.

I have a Knabe 5'4"or so in a church sanctuary now that exhibits this behavior.
The bridge is actually pulling the stirngs down, not pushing them up.  The edge of
the bridge closer to the keys is lower than the back edge.

What can be done for this piano short of replacing the board.

                    Newton


Delwin D Fandrich wrote:

> Newton Hunt wrote:
>
> > Not if the end support moves. (soundboard end that is).
> >                 Newton
> >
> > Ron Nossaman wrote:
> >
> > > Newton,
> > >
> > > The case has nothing to do with maintaining crown. The ribs maintain the
> > > crown, one way or another.
>
> ----------------------------------------------
>
> Yup.  Even then.  You can demonstrate this for yourself by taking a pipe clamp
> -- the type that turns around so that you can exert force in an outward
> direction -- and positioning it so that you can spread the rim apart.  This is
> fairly easy to do on pianos using 'select hardwood' rims.  Whatever crown there
> was originally in the soundboard stays there.
>
> Del