Is there any material in the piano that doesn't have some degree of flexibility? The structural components are also all mechanically tied together. Pianos are squirmy, wriggly, stubborn things! If the plate moves a bit, wouldn't the rim also have to move, and thus the pinblock, and thus the keybed, etc. [?] The toe bone connected to the heel bone, The heel bone connected to the foot bone, The foot bone connected to the leg bone, The leg bone connected to the knee bone..... [?] On Tue, Aug 4, 2009 at 8:13 PM, Ron Nossaman <rnossaman at cox.net> wrote: > Ryan Sowers wrote: > >> Its times like this that I wish PTG had a research and development >> department to answer some of these basic questions once and for all! >> > > We're it, all of us. And it doesn't seem to matter how many times it's gone > over, the answer is STILL not what we were taught to believe, so that can't > be it. > > > I would argue (and no, I have no empirical evidence whatsoever so take it >> for what its worth:!) that there must be a number of different factors >> effecting pitch drop when pianos are pulled up to tension. >> > > Must there? What are they? If you have no idea, why must the numerous > factors be there? > > > When you consider what the teeniest changes to the tuning pin do to pitch, >> why wouldn't the teeniest movement in the bridges, plate, pinblock, rim, >> etc, have a noticeable effect? >> > > Yes. > > > I agree that the theory that the drop is caused by the soundboard being >> pressed down is probably mostly a myth. It sounds good, and seems easy to >> explain to clients, but I doubt it contributes much. >> > > The very fact that it happens in pianos without measurable crown or bearing > (observable and measurable by anyone who might incredibly harbor a secret > wish to actually know), ought to clear it up somewhat. > Ron N > -- Ryan Sowers, RPT Puget Sound Chapter Olympia, WA www.pianova.net -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20090804/ae961398/attachment.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/gif Size: 111 bytes Desc: not available URL: <http://ptg.org/pipermail/pianotech.php/attachments/20090804/ae961398/attachment.gif> -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/gif Size: 899 bytes Desc: not available URL: <http://ptg.org/pipermail/pianotech.php/attachments/20090804/ae961398/attachment-0001.gif>
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