---------------------- multipart/alternative attachment At 10:44 PM 4/26/2002 -0700, you wrote: > >----- Original Message ----- >From: <mailto:Erwinspiano@AOL.COM>Erwinspiano@AOL.COM >To: <mailto:pianotech@ptg.org>pianotech@ptg.org >Sent: April 26, 2002 1:28 PM >Subject: Re: Soundboard Installation & MC > >Ron wrote: > You're still talking about something like 0.003" rim spread from full > crown to flat. >Dale wrote > >>>>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 collapse. > >Actually this sounds about right. I figured this out as well for one of >the Journal articles I did a couple of years back in which I wrote about >this very topic. The difference isn't much. Certainly not enough to >qualify the structure as a buttressed arch. > >I've no idea why this idea persists in the face of fairly easily provable >facts and reasonably clear logic. Good marketing ideas die hard, I guess. > >Del Isn't it the intention of the CTR to prevent the rim creep? Also, couldn't a beveled rim have been bourne from proper woodworking techniques of mating the surfaces prior to glueing and the PR spin came about as a brainstorm? Regards, Jon Page, piano technician Harwich Port, Cape Cod, Mass. mailto:jonpage@attbi.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/41/fb/89/08/attachment.htm ---------------------- multipart/alternative attachment--
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