Ok Lets' do it. I challenge you to do this. Find 2 , 36 inch long sections of 1/4 sawn sound board spruce...approx. 6 inches wide .I.e. as if it were cut right out of a panel. Dry one of them down to 3.5 % emc & the other to about 6% emc. Glue on a flat rib/bar with typical dimensions of what you might find on a sound board of that cross section. Even scallop out the ends as is usual. Now while dried down, glue on the rib on a flat table top. Now give it three days in 50% plus humidity conditions & then tell me a few points of moisture content don't' make a difference. One will be far more bowed than the other. The power of wood cells in compression is enormous & it will produce much stiffness on it's own when its' restrained from expanding on one side. enough so as to bend a flat pine/spruce rib which is pretty dang stiff all on it's own. I think that because the American climate may be so different from parts of Europe, & that sound board making techniques have adapted to them as well, that our semantics & experiences may be missing each other like ships in the night. Regards Dale Let's test the properties of spruce over the range of dampness to which it will be subjected and then see how significant the change is. JD Dale Erwin--Piano Restorations 4721 Parker rd Modesto, Ca. 95357 Shop 209-577-8397 Web site _http://www.Erwinspiano.com_ (http://www.erwinspiano.com/) Restoration & Sales of Steinway & Sons & other fine pianos. " Soundboards by Design" **************The year's hottest artists on the red carpet at the Grammy Awards. Go to AOL Music. (http://music.aol.com/grammys?NCID=aolcmp00300000002565) -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080213/59b8f31f/attachment.html
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