No, I was talking about this picture. But as long as were talking about it, where did the data for the graph come from? By actual test? ddf Delwin D Fandrich Piano Design & Fabrication 6939 Foothill Court SW, Olympia, Washington 98512 USA Phone 360.515.0119 - Cell 360.388.6525 <mailto:del at fandrichpiano.com> del at fandrichpiano.com - <mailto:ddfandrich at gmail.com> ddfandrich at gmail.com From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of David Love Sent: Thursday, July 14, 2011 10:30 PM To: pianotech at ptg.org Subject: Re: [pianotech] Measuring Crown Radius Del: Just to clarify my previous post as I sent it from a blackberry. I assume you were talking about this picture. The picture has nothing to do with how the rib is bent. In fact it has nothing to do with *a rib* at all but represents the entire assembly and its deflection characteristics under increasing load. The y axis represents crown and the x axis load. As the load increases the crown diminishes. The crown diminishes at a faster rate as the load is first added, but as the board stiffens with increasing load the rate of deflection per lb diminishes. That's all. cid:image007.png at 01CC376C.19134270 David Love www.davidlovepianos.com -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of David Love Sent: Thursday, July 14, 2011 7:26 PM To: pianotech at ptg.org Subject: Re: [pianotech] Measuring Crown Radius It simply illustrates that as load increases the amount of crown diminishes at an ever decreasing rate. David Love www.davidlovepianos.com (sent from bb) -----Original Message----- From: "Delwin D Fandrich" <del at fandrichpiano.com> Sender: pianotech-bounces at ptg.org Date: Thu, 14 Jul 2011 17:09:20 To: <pianotech at ptg.org> Reply-To: pianotech at ptg.org Subject: Re: [pianotech] Measuring Crown Radius David, what are you trying to illustrate in the picture? You have your rib bent to a crown radius that will never be seen in a real piano. ddf Delwin D Fandrich Piano Design & Fabrication 6939 Foothill Court SW, Olympia, Washington 98512 USA Phone 360.515.0119 - Cell 360.388.6525 del at fandrichpiano.com - ddfandrich at gmail.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20110714/5dd2ee87/attachment-0001.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/png Size: 787 bytes Desc: not available URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20110714/5dd2ee87/attachment-0002.png> -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/png Size: 1932 bytes Desc: not available URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20110714/5dd2ee87/attachment-0003.png> -------------- next part -------------- A non-text attachment was scrubbed... Name: IMG00273-20110713-2009.jpg Type: image/jpeg Size: 68287 bytes Desc: not available URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20110714/5dd2ee87/attachment-0001.jpg>
This PTG archive page provided courtesy of Moy Piano Service, LLC