OK. On these particular instruments, the plate as attached to the stretcher via several screws that run between the plate and the stretcher along the length of the plate on that side. Do you think that attaching the entire length of the block itself to the stretcher adds any significant resistance to vertical movement? David Love davidlovepianos at comcast.net www.davidlovepianos.com -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of A440A at aol.com Sent: Saturday, August 02, 2008 7:31 AM To: pianotech at ptg.org Subject: Re: MH BB Pinblock David writes: << pinblock is screwed to the inner rim via a couple of plate screws that penetrate the block down to the rim) all the way to the stretcher why would you need to attach the pinblock to the stretcher to create case stability. >> I don't think it is a question of case stability, but rather, stiffness in the plate/block assembly. The attachment of the block to the stretcher assists the block in resisting movment of the strings in the vertical plane. These vibrations are quite small, but I consider them important, and without some vertical component to the "beam" that resists them, more energy is lost to heat than otherwise would be. It could be that the increased stiffness afforded by attaching the block to the stretcher would also increase the entrainment of the strings' vibration to the case. Regards, Ed Foote RPT http://www.uk-piano.org/edfoote/index.html www.uk-piano.org/edfoote/well_tempered_piano.html <BR><BR><BR>**************<BR>Looking for a car that's sporty, fun and fits in your budget? Read reviews on AOL Autos.<BR> (http://autos.aol.com/cars-BMW-128-2008/expert-review?ncid=aolaut00050000000 017 )</HTML>
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