<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; = charset=iso-8859-1"> <META content="MSHTML 6.00.2800.1226" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial>I guess then you would have a laminated rib = constructed of two laminations with one of the laminations being excessively thick. = With laminating, you need at least four or five laminations (at least = relating to the dimensions and materials commonly used in rib/cut-off = bar/bridge/etc. construction) to get to a state where the laminated assembly will not = experience significant springback. A two laminate assembly might have 40% or 50% springback. In your case below, you would have one laminate trying to = spring back and the machined one trying to stay in an arc. I think you'd end up = with an unpredictable mess!</FONT></DIV> <DIV><FONT face=Arial></FONT> </DIV> <DIV><FONT face=Arial>Is it like late at night or something over = there? Go to bed - tomorrow will be a better day!</FONT></DIV> <DIV><FONT face=Arial></FONT> </DIV> <DIV><FONT face=Arial>Terry Farrell</FONT></DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: = black"><B>From:</B> <A title=Richard.Brekne@grieg.uib.no href="mailto:Richard.Brekne@grieg.uib.no">Richard Brekne</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A = title=pianotech@ptg.org href="mailto:pianotech@ptg.org">Pianotech</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, October 03, 2003 = 4:38 AM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: RC vs CC = again</DIV> <DIV><BR></DIV>  <P>Don wrote: <BLOCKQUOTE TYPE="CITE">Hi Ric, <P>Increasing the height of the ribs on a true C.C. board would seem = to me to <BR>increase the stress on the board--not reduce it. <BR>  = <BR><A = href="https://www.moypiano.com/resources/#archives"></A> </P></BL= OCKQUOTE> <P><BR>Dont remember suggesting it would reduce stress on the board... = but I did understand Dels point. <P>But here's a thought down the bunny path to think about... <P>Say you have a pure CC panel already assembled and crowned... and = THEN you decide to increase rib height..... and you use machine crowned ribs = that match the already existing crown to glue on the the undeside of the existing = ribs. <P>Whats the point ??... just musing... :)... for now that is. <P>Cheers <BR>RicB <BR>-- <BR>Richard Brekne <BR>RPT, N.P.T.F. = <BR>UiB, Bergen, Norway <BR><A href="mailto:rbrekne@broadpark.no">mailto:rbrekne@broadpark.no</A> = <BR><A = href="http://home.broadpark.no/~rbrekne/ricmain.html">http://home.broad= park.no/~rbrekne/ricmain.html</A> <BR><A = href="http://www.hf.uib.no/grieg/personer/cv_RB.html">http://www.hf.uib= .no/grieg/personer/cv_RB.html</A> <BR>  </P></BLOCKQUOTE></BODY></HTML>