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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>
<A title=Erwinspiano@AOL.COM
href="mailto:Erwinspiano@AOL.COM">Erwinspiano@AOL.COM</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A =
title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">pianotech@ptg.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> April 26, 2002 1:28 =
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Soundboard =
Installation
& MC</DIV>
<DIV><BR></DIV><FONT face=arial,helvetica><FONT lang=0
style="BACKGROUND-COLOR: #ffffff" face=Arial color=#000040 =
size=2
FAMILY="SANSSERIF"><BR> You're</FONT><FONT =
lang=0
style="BACKGROUND-COLOR: #ffffff" face=Arial color=#000040 =
size=2
FAMILY="SANSSERIF"> </FONT><FONT lang=0 style="BACKGROUND-COLOR: =
#ffffff"
face=Arial color=#000040 size=2 FAMILY="SANSSERIF">still =
talking about
something like 0.003" rim spread from full crown to flat.</FONT><FONT =
lang=0
style="BACKGROUND-COLOR: #ffffff" face=Arial color=#000040 =
size=2
FAMILY="SANSSERIF"><BR> Dale =
wrote<BR></FONT><FONT
lang=0 style="BACKGROUND-COLOR: #ffffff" face="Times New Roman =
Greek"
color=#000040 size=3 FAMILY="SERIF">>>>>I'm not sure =
I agree with
that. I'm about to press up an Stwy L board and after it's =
pressed and
crowned I'll measure across the bottom from each end of the longest =
rib and
then I personally will sit or stand on the board on the floor =
and see
how far the rib dimesion expands. Hmm this might be hard to measure =
but I'm
going to try anyway. Maybe I'l just make a mark on the floor at each =
rib end
and visually observe. Ever done this? It seems to me that .003 figure =
would
have to be greater for the crown to completely col.lapse<BR>Actually I =
see
your point thought that even if the board/ribs were pressing =
significantly
into the rim like a buttress the wood creep in the rim over time would =
still
eventually be the crowns undoing. Still it seems like it would have to =
spread
at least .050. </FONT><FONT lang=0 style="BACKGROUND-COLOR: =
#ffffff"
face=Arial color=#000040 size=2 =
FAMILY="SANSSERIF"><BR></FONT><FONT lang=0
style="BACKGROUND-COLOR: #ffffff" face=Arial color=#000040 =
size=2
FAMILY="SANSSERIF"> =
<BR> Ron
wrote<BR>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px =
solid; MARGIN-RIGHT: 0px"
TYPE="CITE">You bend a rim more than that just leaning against it, =
so
there's no way it<BR>will support board crown as a buttressed arch =
under the
bearing loads the board<BR>is subject to. The PSI pressures involved =
are
well beyond the yield point of<BR>the spruce even if you did have an =
absolutely rigid rim - which you
=
don't.<BR><BR>-=-=-=-=--==-<BR>><BR>> =
>>>>>>>> This is the false crown measured by =
piano
techs that is mistaken<BR>> for real crown values. 1/8" crown on =
the
logest ribs isn't really crown. As<BR>> you know this false =
crown
disappears as soon as the board is released from<BR>> the rim
bevel.<BR><BR><BR>Exactly the point.</FONT><FONT lang=0
style="BACKGROUND-COLOR: #ffffff" face=Arial color=#000040 =
size=2
FAMILY="SANSSERIF"></BLOCKQUOTE><BR><BR></FONT><FONT lang=0
style="BACKGROUND-COLOR: #ffffff" face="Times New Roman Greek" =
color=#000040
size=3 FAMILY="SERIF"><I>
>>>>>>>>Hey I catch on quick after a long
=
time.<BR> &nbs=
p;
=
>>>>>>>>>Dale>>>>>>>><=
/FONT><FONT
lang=0 style="BACKGROUND-COLOR: #ffffff" face=Arial =
color=#000040 size=2
FAMILY="SANSSERIF"></I><BR></FONT><FONT lang=0
style="BACKGROUND-COLOR: #ffffff" face=Arial color=#000040 =
size=2
FAMILY="SANSSERIF"><BR>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px =
solid; MARGIN-RIGHT: 0px"
TYPE="CITE"><BR>.</FONT><FONT lang=0 style="BACKGROUND-COLOR: =
#ffffff"
face="Times New Roman Greek" color=#000040 size=3
=
FAMILY="SERIF"></BLOCKQUOTE><I><BR></BLOCKQUOTE></I></FONT></FONT></BOD=
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