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<DIV><FONT face=Arial size=2><EM>Ron O wrote: </EM></FONT></DIV>
<DIV><FONT face=Arial size=2><EM>> I pulled one original board =
which <BR>>
clearly had lots of crown when it was installed, but the inner was =
<BR>> made
flat. The glue joint was good around the outer edge but the <BR>> =
inner edge
was only just making contact or just off the rim.</EM></FONT></DIV>
<DIV><EM><FONT face=Arial size=2></FONT></EM> </DIV>
<DIV><FONT face=Arial size=2>Sound to me like somebody needs to =
learn how
to either spread glue, or more likely clamp a glue joint
thoroughly!</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I've started to use a method that Ron N =
shared with
me. I cut strips of scrap plywood the shape and width of the inner
rim/belly-rail/fish/cut-offs/etc., place them on top of the soundboard =
and use
those pieces as clamping blocks. I think use of such blocks, along =
with
numerous clamps, insures a pretty darn good glue joint - oh, and good =
glue
surfaces and good glue and the proper amount of glue and anything else I =
have
neglected to mention.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Terry Farrell</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>----- Original Message ----- </FONT>
<DIV><FONT face=Arial size=2>> >Is a flat belly rail a good =
idea
then?<BR>>><BR>>>Thanks<BR>>>RicB<BR>> <BR>> It =
is
around here. We're using a flat belly rail in our 225 pianos. <BR>> =
By this I
mean that there is no curvature across the span of the <BR>> belly =
rail. The
central area of our boards have nearly 10 mm of crown <BR>> unstrung. =
When
strung, a string line placed underneath the board will <BR>> almost =
clear the
sound board buttons. If the belly rail was crowned <BR>> as well it =
would
make for serious problems achieving a workable <BR>> relationship =
between
bridge height, bearing block height and the <BR>> correct down =
bearing angle
setting.<BR>> <BR>> We do angle the belly rail and inner rim =
gluing face
to the crown of <BR>> the board. As Terry suggests, it probably isn't =
greatly
important. <BR>> But I like to do it just to know that the glue joint =
is good
all the <BR>> way across the interface. I'll pulled one original =
board which
<BR>> clearly had lots of crown when it was installed, but the inner =
was
<BR>> made flat. The glue joint was good around the outer edge but =
the
<BR>> inner edge was only just making contact or just off the rim. I =
can't
<BR>> say I'd be comfortable about such a gluing arrangement. It =
could very
<BR>> easily allow noise at the perimeter of the board in some
instances.<BR>> <BR>> Ron O.<BR>> -- <BR>> OVERS PIANOS -
SYDNEY<BR>> Grand Piano
Manufacturers</FONT></DIV></DIV></BODY></HTML>