<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style></style></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1>I don’t think the type of board will matter in terms of the procedure you have for gluing it in.  Nor will it impact the desire to have the rim beveled.  It’s desirable in all cases.  <o:p></o:p><o:p> </o:p>David Love<o:p></o:p>www.davidlovepianos.com<o:p></o:p><o:p> </o:p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of Dale Erwin Sent: Saturday, December 01, 2012 3:28 PM To: pianotech@ptg.org Subject: Re: [pianotech] Belly talk<o:p></o:p></div><o:p> </o:p><pre><tt>Jim</tt><o:p></o:p></pre><pre><tt> Nick is making a rib crowned board of some kind...right Nick?  </tt><o:p></o:p></pre><pre> Most of the time I am talking about a rib crowned system dried to no more than 5.5 %. or 6% depending on where it goes<o:p></o:p></pre><pre><tt>I also make rib crowned and supported boards. Both have styles have far more initial crown than C.C. boards.</tt><o:p></o:p></pre><pre><tt>Apples, oranges, apples , oranges...bananas?.... I like em all </tt><o:p></o:p></pre><pre> <tt><o:p></o:p></tt></pre><pre><tt>One difficulty in this discussion is that Nick is (correct me if I'm <o:p></o:p></tt></pre><pre><tt>wrong, Nick) talking about a CC system, and I am talking about a Rib <o:p></o:p></tt></pre><pre><tt>crowned system. I think Dale may be referring to a hybrid system.  If we <o:p></o:p></tt></pre><pre><tt>talk of 3 different structural systems as if they are the same <o:p></o:p></tt></pre><pre><tt>structural system, thing get mushy...an apples and oranges thing.<o:p></o:p></tt></pre><pre><tt><o:p> </o:p></tt></pre><pre><tt><o:p> </o:p></tt></pre><pre><tt>Jim Ialeggio</tt><o:p></o:p></pre><o:p> </o:p><div>Dale Erwin R.P.T. Erwin's Piano Restoration Inc. Mason & Hamlin/Steinway/U.S. pianos <a href="http://www.Erwinspiano.com">www.Erwinspiano.com</a> Phone: 209-577-8397 <tt> </tt> <tt>  </tt><o:p></o:p></div><o:p> </o:p><div>-----Original Message----- From: Jim Ialeggio <<a href="mailto:jim@grandpianosolutions.com">jim@grandpianosolutions.com</a>> To: pianotech <<a href="mailto:pianotech@ptg.org">pianotech@ptg.org</a>> Sent: Sat, Dec 1, 2012 12:39 pm Subject: [pianotech] Belly talk<o:p></o:p><div id="AOLMsgPart_0_a899b52f-e354-433d-b339-2a24c8ddf548"><pre style='background:white'><tt>HI Dale<o:p></o:p></tt></pre><pre style='background:white'><tt><o:p> </o:p></tt></pre><pre style='background:white'><tt>< In the case cited the piano in question was an Stwy A-2 and having <o:p></o:p></tt></pre><pre style='background:white'><tt>done quite a few A-2s both ways...<o:p></o:p></tt></pre><pre style='background:white'><tt><o:p> </o:p></tt></pre><pre style='background:white'><tt>Right. This is where the complexity of the system in general and each <o:p></o:p></tt></pre><pre style='background:white'><tt>individual belly comes into play.  I can see a reasoning why the sound <o:p></o:p></tt></pre><pre style='background:white'><tt>might be a little different between the single and double crown, but I <o:p></o:p></tt></pre><pre style='background:white'><tt>really don't think I would attribute it the 3 dimensionality of the <o:p></o:p></tt></pre><pre style='background:white'><tt>system as Nick is suggesting. Rather I could see it as distributing the <o:p></o:p></tt></pre><pre style='background:white'><tt>tail "bend down" in a more evenly trended fashion across more of the <o:p></o:p></tt></pre><pre style='background:white'><tt>long bridge rather than localized at just the tail.<o:p></o:p></tt></pre><pre style='background:white'><tt><o:p> </o:p></tt></pre><pre style='background:white'><tt>I used to attribute more stiffness to the shape of the crown itself. But <o:p></o:p></tt></pre><pre style='background:white'><tt>after watching these things behave in and out of the piano the crown <o:p></o:p></tt></pre><pre style='background:white'><tt>shape in and of itself, at least in a minimally compressed rib crowned <o:p></o:p></tt></pre><pre style='background:white'><tt>board, really does not seem to be doing much in and of itself. As I say, <o:p></o:p></tt></pre><pre style='background:white'><tt>this was not my opinion originally but it certainly is where I'm going <o:p></o:p></tt></pre><pre style='background:white'><tt>right now..at least until suppertime<G>. However, to be clear my opinion <o:p></o:p></tt></pre><pre style='background:white'><tt>is being formed regarding the RC&C structure in particular, not a <o:p></o:p></tt></pre><pre style='background:white'><tt>compression system.<o:p></o:p></tt></pre><pre style='background:white'><tt><o:p> </o:p></tt></pre><pre style='background:white'><tt>One difficulty in this discussion is that Nick is (correct me if I'm <o:p></o:p></tt></pre><pre style='background:white'><tt>wrong, Nick) talking about a CC system, and I am talking about a Rib <o:p></o:p></tt></pre><pre style='background:white'><tt>crowned system. I think Dale may be referring to a hybrid system.  If we <o:p></o:p></tt></pre><pre style='background:white'><tt>talk of 3 different structural systems as if they are the same <o:p></o:p></tt></pre><pre style='background:white'><tt>structural system, thing get mushy...an apples and oranges thing.<o:p></o:p></tt></pre><pre style='background:white'><tt><o:p> </o:p></tt></pre><pre style='background:white'><tt><o:p> </o:p></tt></pre><pre style='background:white'><tt>Jim Ialeggio<o:p></o:p></tt></pre><pre style='background:white'><tt><o:p> </o:p></tt></pre><pre style='background:white'><tt>-- <o:p></o:p></tt></pre><pre style='background:white'><tt>Jim Ialeggio   <o:p></o:p></tt></pre><pre style='background:white'><tt><a href="mailto:jim@grandpianosolutions.com">jim@grandpianosolutions.com</a><o:p></o:p></tt></pre><pre style='background:white'><tt>978 425-9026<o:p></o:p></tt></pre><pre style='background:white'><tt>Shirley Center, MA<o:p></o:p></tt></pre><pre style='background:white'><tt><o:p> </o:p></tt></pre></div></div></div></body></html>