Bridge design

[Farrell]

A few days ago I was looking at the bridge on a Baldwin M grand. It did exactly the same thing you are describing. If you notice (assuming I'm on the right track here) the undercut fades out and begins on the other side where there is a dogleg in the bridge. My guess at what they were trying to do was to keep the soundboard contact footprint one continuous curve, i.e. a "straight" curve (as opposed to a squiggle).

BTW, what is a Knabe Mignon. I have a monstrous 1902 Knabe grand (about 6' 2") in my shop right now.

Terry Farrell
  
----- Original Message ----- 
From: "Keith McGavern" <kam544@gbronline.com>
To: "Pianotech" <pianotech@ptg.org>
Sent: Wednesday, March 26, 2003 10:48 PM
Subject: Re: Bridge design


> 
> On Wednesday, March 26, 2003, at 09:28 PM, Barbara J. Fandrich wrote:
> >> Del wrote:
> >>> Typically we undercut a new treble bridge along the leading edge. This
> >>> undercut extends back as far as a perpendicular line drawn straight 
> >>> down
> >>> from the leading rows of bridge pins.
> 
> I just looked at the tenor/treble bridge in a 1912 Knabe Mignon (about 
> 5' 8") I have, and this undercut you're referencing does this:
> 
> It's undercut to the first strut (E6-Eb6) where it straightens out 
> momentarily, then begins again after that strut and continues to F#5-G5, 
> where it begins again, *but* on the opposite side throughout the rest of 
> the bridge to Bb2.
> 
> Pretty interesting.
> 
> Keith McGavern
> 
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives
>