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<DIV><FONT size=3> Dave</FONT></DIV>
<DIV><FONT size=3> Another variable to keep in mind is that many of =
us are
using sitka spruce panels & the older designs used predominantly a softe=
r
eastern wood. Softer wood under compression requires more thickness for stre=
nght
to survive. WHere as Sitka is stiffer denser having the greatest strength to=
wieght ratio. SO it can be thinner in the designs of any kind. It depends on=
your idea of mass in the panel too.</FONT></DIV>
<DIV><FONT size=3> I keep that in mind when I'm choosing=
panel
thickness. This is also a variable that could effect part of the equation fo=
r
hammer selection.</FONT></DIV>
<DIV><FONT size=3> I.E> many old Stwy A 2s had panels routinely .3=
60 in
the main part of the panel. With Sitka .320 to 340 is plenty even if you wer=
e
stricitly compression crowning.</FONT></DIV>
<DIV><FONT size=3> Dale</FONT></DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><=
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style="BACKGROUND-COLOR: transparent" face=Arial color=#000080 size=
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<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Well I meant th=
at
more as a question than a statement. <SPAN
style="mso-spacerun: yes"> </SPAN>One thing that does interest me i=
s how
CC <SPAN class=SpellE>vs</SPAN> RC&S methods influence, either in de=
sign
or execution, the relationship between mass and spring rate and how that m=
ight
relate to proper hammer matching.<SPAN style="mso-spacerun: yes">
</SPAN>Which system<SPAN class=GramE>, <SPAN
style="mso-spacerun: yes"> </SPAN>for</SPAN> example, tends to have=
a
thicker panel?<SPAN style="mso-spacerun: yes"> </SPAN>It seems tha=
t the
CC panel is generally thicker in the center and tapered toward the rim whe=
reas
the RC&S panel is slightly thinner and more uniform in thickness (exce=
pt
maybe around the bass perimeter). <SPAN
style="mso-spacerun: yes"> </SPAN>Is that correct?<SPAN
style="mso-spacerun: yes"> </SPAN>Might not the difference in mass=
distribution of the CC panel explain differences in hammer matching and
potentially some tonal differences? <SPAN
style="mso-spacerun: yes"> </SPAN>It seems that the CC panel requir=
es a
much denser and possibly less flexible hammer than the RC&S board (at
least in my experience).<SPAN style="mso-spacerun: yes"> </SPAN>Wh=
ether
the tone production potential between the two with appropriate hammers is
net/net, is something I can't really answer but do wonder about.<SPAN
style="mso-spacerun: yes"> </SPAN>The subject might point to some
differences.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:=
p></SPAN></FONT></P>
<DIV>
<P><FONT face="Times New Roman" color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; mso-no-proof: yes">David
Love<BR></SPAN></FONT><st1:PersonName><FONT color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; mso-no-proof: yes">davidlovepianos@=
comcast.net</SPAN></FONT></st1:PersonName><FONT
color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; mso-no-proof: yes">
</SPAN></FONT><o:p></o:p></P></DIV></FONT></BLOCKQUOTE></DIV>
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