Bridge pin spacing (was Baldwin SD-10)

[Delwin D Fandrich]

----- Original Message -----
From: "Ron Overs" <sec@overspianos.com.au>
To: <pianotech@ptg.org>
Sent: September 08, 2001 6:41 PM
Subject: Re: Bridge pin spacing (was Baldwin SD-10)


>
> Indeed. A wider lower bridge will have higher mass with less
> stiffness, and vice versa.

Actually a wide, low bridge will have the exactly the same mass as a narrow,
tall bridge if the cross-sectional area is the same. That is, a bridge that
is 40 mm wide and 30 mm high will have exactly the same mass as a bridge
that is 30 mm wide and 40 mm high. The latter will be much stiffer in the
vertical plane, of course (assuming a grand piano configuration).

(OK, the wide, low bridge might have a bit more wood removed at the notches
and thereby loose just a bit of mass to the narrow, tall bridge. Let's not
nit-pick.)

Del