This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment ----- Original Message -----=20 From: Erwinspiano@aol.com=20 To: pianotech@ptg.org=20 Sent: January 04, 2003 7:24 PM Subject: Re: Restored Baldwin out the door ----- Original Message -----=20 From: Erwinspiano@aol.com=20 To: pianotech@ptg.org=20 Sent: January 03, 2003 3:55 PM Subject: Restored Baldwin out the door Interesting post Del as I believe this model is the = Balwin C model you mention in the post at the bottom of this one. = Shocked may have been the wrong choice of words describing the shallow = rib depth but ribs 1 thru 4 were 24mm wide and 14,15.5,18,&18mm deep. = compared to the Baldwin R model(same length 5ft. 8") 18,21,22,24mm. Same width. I beefed up the bottom 7 ribs in depth. =20 Baldwin R depth BaldwinC depth rib depth original Rib depth new = depth rib length C 1 18 mm 14 mm = 17mm 23 inches = =20 2 21 15.5 = 18.5 31 3 22 18 = 22 40 4 24 18 = 23 46 5 24 18 = 25 49 6 24 19.5 = 26 42 7 24 19.5 = 24 34 8 19 23 = 23 27 =20 9 19 21 = 21 22 10 17 19 = 19 18 11 16 17.5 = 18 15 12 no rib 15.5 = 16 11 As you can see the original depth of the last five ribs on the = C were already stiffer than the Rs. The first 8 ribs were crowned to a 60 ft radius and the last four = at a 2 by 50 and 2 forty ft. It's a very good rib scale with excellent = response. Board emc 6% at time of ribbing. >340 thick Sitka panel = thinned at the edges except treble. Please use it if you wish. Regards Dale Erwin If I'm not mistaken (and I might well be) the Model C was morphed into = the Model L -- both approximately 6' 3" in length. I don't know what the = predecessor to the Model R might have been. As may be, interesting rib specifications. (Don't suppose you also have = the width of these various ribs?) Again, if I'm not mistaken (and the = chances of this are getting better and better as this discussion goes = on) these early Baldwin grands had compression-crowned soundboards. It = was impossible to tell from the specifications I had to work with and, = needless to say, the bellymen who might have known were long gone. = Putting together the various clues at my disposal at the time I came to = the conclusion that the boards in the original were compression-crowned. = Later the ribs were made some more substantial -- that is, taller -- = when they started (at least quasi-) rib-crowning the things. I don't = know when they started leaving the twelfth rib out.... Del ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/a3/ed/ad/19/attachment.htm ---------------------- multipart/alternative attachment--
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