Aha! was flat facts

[Alan]

And herein lies the interesting crux of my whole question from the
beginning: We have guesses, suppositions, and opinions but, apparently,
really don't know why pianos get flatter and flatter and flatter over time.
Seems like this question is so basic that experiments would have been done
long ago and we'd have a definitive answer. And maybe, who knows, some ideas
for building more stable pianos.

I still go with turning pins, though. There is a natural, sustained tension
on the pin from the string that would love to turn the thing
counter-clockwise. Earth tremors, children thudding across the floor, sonic
booms, moving the piano, and hovering ufo's would all put vibration into the
system, however briefly, and the pin could jiggle just a a third of a skinny
hair each time. But over the years ...

Alan R. Barnard
Salem, MO


-----Original Message-----
From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf
Of Ron Nossaman
Sent: Sunday, March 27, 2005 11:38 AM
To: Pianotech
Subject: Re: was flat facts



> I don't really buy into the "tuning pin turns" theory.

Me either, nor the wire stretching. Music wire doesn't continue to 
stretch over time unless it's tensioned at it's yield point - then 
it stretches, necks down, and breaks.
Ron N

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