[pianotech] Belly talk

[Dale Erwin]

David
  I agree. Having the contour match the crown of the board is a good thing. The rasten bevel is usually about 1 1/2 degrees.  The 1 1/2 degree bevel doesn't add any  bending stress either. IMO a flat one does.


Dale Erwin R.P.T.
Erwin's Piano Restoration Inc.
 Mason & Hamlin/Steinway/U.S. pianos
www.Erwinspiano.com
Phone: 209-577-8397

 


 The panel will be crowned and so will match the slight
slope of the inner rim and belly rail so that you don't have to force the
panel down to the inner rim at the inner edge.  The ideal amount of slope on
the inner rim should match the crown of the panel in my opinion.  Why force
unnecessary stress onto the panel?  Some would argue, in fact, that if the
inner rim isn't sloped by design that you should endeavor to make it so.  

Assuming we're talking about the same thing, that is.

David Love
www.davidlovepianos.com


-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Jim Ialeggio
Sent: Friday, November 30, 2012 9:29 AM
To: pianotech at ptg.org
Subject: [pianotech] Belly talk

Rebuilding a 40's aeolian knabe grand, new works, including RC&S belly of my
design.

In prepping the case/rim for Fish, Cutoff and new rib placement, the belly
rail and curved side of the rim have what I would consider a significant and
(to my mind) superfluous "crown" machined into them. I don't want the
gratuitous complications, and will be removing the crowns in the next day or
so. This is especially true on the belly rail, where, because of the
location of the cutoff, a significant portion of the "crown" radius is not
even located in the "working" part of the board.

A question to other rib crowned belly heads...what do you do with these
"crowns"?  Leave'em or hack'em off? Since it's a bit of work to remove them,
do others leave them without undo complications?

Jim Ialeggio

-- 
Jim Ialeggio	
jim at grandpianosolutions.com
978 425-9026
Shirley Center, MA


 
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