At 10:37 PM 6/29/2006, you wrote: >I was so inspired by the Rebuilders at >Rochester, that I took the old Hardman grand, 5' >something, painted white, that I had on its side >in my shop for over 2 years, and tore it all >apart. The soundboard came out, with a little >persuasion and white vinegar, essentially intact. > I took the measurements of all the ribs, and > the thickness of the soundboard. Do the > measurements need to be in MM's to do the > deflection calculations on Ron's handout? (I > loaned it to someone, it's not right in front of me). > Interesting, that the thickness is much > thinner at the bass end than at the treble (at > the edges, anyway). Like .235 at the bass end, > to .335 at the treble. 13 ribs, most > essentially square, with a little difference > around ribs 3-8, all a little taller than wide. >Ribs looked to be flat, so it's a compression crowned board, right? > Clark A. Sprague Greg Newell Greg's Piano Forté mailto:gnewell at ameritech.net www.gregspianoforte.com
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