----- Original Message ----- From: "Farrell" <mfarrel2@tampabay.rr.com> To: "Pianotech" <pianotech@ptg.org> Sent: October 09, 2002 3:47 AM Subject: Re: split case > If Del F. is still reading - you mentioned the other day about joining short planks for panels. I wonder if this gizmo would be of benefit? It is on the product page for http://www.westsystem.com > > 875 ScarfferTM > A unique tool designed by Gougeon Brothers for cutting accurate scarf joints in plywood up to 3/8" thick. Attaches easily to most circular saws and is easily removed. They may be claiming this as one of their own developments but these things have been around for years--check your back issues of WoodenBoat magazine. Sure, they would work but they are awfully wasteful of wood. They typically cut an 8:1 or a 12:1 slope. Tests have shown that end-to-end joints using a slope in this range, when properly glued, results in a joint that equals the strength of the rest of the board. But this is overkill for a piano soundboard. There is little or no load on an end-to-end joint in a board used in a piano soundboard. One successful joint I have seen in this application was simply a laid-down Z kind of thing. I'm working on it. Del
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