<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style></style></head><body lang=EN-US link="#000000" vlink="#000000"><div class=WordSection1>Oh, my, are you ever the optimist! Those who don’t get it and who are unwilling to try even the simplest experiment to prove it for themselves are still not going to get it and are still going to be cluttering up the netwaves with a steady stream of denial emails. Sigh.<o:p></o:p><o:p> </o:p>ddf<o:p></o:p><o:p> </o:p>Delwin D Fandrich<o:p></o:p>Piano Design & Fabrication<o:p></o:p>6939 Foothill Court SW, Olympia, Washington 98512 USA<o:p></o:p>Phone  360.515.0119 — Cell 360.388.6525<o:p></o:p><a href="mailto:del@fandrichpiano.com">del@fandrichpiano.com </a>— <a href="mailto:ddfandrich@gmail.com">ddfandrich@gmail.com</a><o:p></o:p><o:p> </o:p>From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of Dale Erwin Sent: Thursday, May 24, 2012 1:13 PM To: pianotech@ptg.org Subject: Re: [pianotech] [CAUT] Fwd: Mason & Hamlin soundboard model with tuning fork<o:p></o:p><o:p> </o:p><o:p> </o:p><div>Dale Erwin... RPT Mason & Hamlin/Steinway/U.S pianos <a href="http://www.Erwinspiano.com">www.Erwinspiano.com</a> 209-577-8397 <tt> </tt> Yeah...This is a much better word picture. We should measure this phenomena and put it under a microscope, film it & write an article about it....Nahhhh. LOL. Never the less it does(should) end the debate/argument Dale   <o:p></o:p><div><div>Del wrote Actually, think of a feathered rib with the <3/16” high ends set into notches in the rim and with the main body of the rib extending well below the bottom of the notch. When the center of the rib is pressed down the ends of the ribs—if you can see them move at all—will pull in very slightly. <o:p></o:p></div></div><o:p> </o:p></div><o:p> </o:p><div>-----Original Message----- From: Delwin D Fandrich <<a href="mailto:del@fandrichpiano.com">del@fandrichpiano.com</a>> To: pianotech <<a href="mailto:pianotech@ptg.org">pianotech@ptg.org</a>> Sent: Thu, May 24, 2012 8:23 am Subject: Re: [pianotech] [CAUT] Fwd: Mason & Hamlin soundboard model with tuning fork<o:p></o:p><div id="AOLMsgPart_1_7fa3a3ce-3227-4c1e-a4bd-c360e33cfb8f"><div><div>Actually, think of a feathered rib with the <3/16” high ends set into notches in the rim and with the main body of the rib extending well below the bottom of the notch. When the center of the rib is pressed down the ends of the ribs—if you can see them move at all—will pull in very slightly. <o:p></o:p></div><div> <o:p></o:p></div><div>… and, on a more practical level, think of that 4” (±) thick hard maple rim structure and then think of that <3/8” soft spruce soundboard panel and—what?—a 3/16” (or thinner) rib end spaced every few inches and think to yourself, “in a bending contest which of these is going to give first?”<o:p></o:p></div><div> <o:p></o:p></div><div>Even if Ron’s point about rib geometry were not correct—though it is—the argument about the movement of the soundboard affecting the structure of the piano ends right here. As does the argument about the rim sustaining soundboard crown over time. <o:p></o:p></div><div> <o:p></o:p></div><div>ddf<o:p></o:p></div><div> <o:p></o:p></div><div>Delwin D Fandrich<o:p></o:p></div><div>Piano Design & Fabrication<o:p></o:p></div><div>6939 Foothill Court SW, Olympia, Washington 98512 USA<o:p></o:p></div><div>Phone  360.515.0119 — Cell  360.388.6525<o:p></o:p></div><div><a href="mailto:del@fandrichpiano.com">del@fandrichpiano.com </a>— <a href="mailto:ddfandrich@gmail.com">ddfandrich@gmail.com</a><o:p></o:p></div><div> <o:p></o:p></div><div style='margin-left:36.0pt'>From: <a href="mailto:pianotech-bounces@ptg.org">pianotech-bounces@ptg.org</a> [<a href="mailto:pianotech-bounces@ptg.org?">mailto:pianotech-bounces@ptg.org</a>] On Behalf Of Dale Erwin Sent: Thursday, May 24, 2012 7:46 AM To: <a href="mailto:pianotech@ptg.org">pianotech@ptg.org</a> Subject: Re: [pianotech] [CAUT] Fwd: Mason & Hamlin soundboard model with tuning fork<o:p></o:p></div><div style='margin-left:36.0pt'> <o:p></o:p></div><div style='margin-left:36.0pt;margin-bottom:12.0pt'>Think rotate upward instead of pull in. Place a long flat stick across an open space supported at each end and press on the middle of it.  Watch the the rib ends move/rotate upward not out .<o:p></o:p></div><div><div style='margin-left:36.0pt;margin-bottom:12.0pt'>Dale Erwin... RPT Mason & Hamlin/Steinway/U.S pianos <a href="http://www.Erwinspiano.com" target="_blank">www.Erwinspiano.com</a> 209-577-8397 <o:p></o:p></div></div></div></div></div></div></body></html>