Aha! was flat facts

[Alan Forsyth]

I have actually come across a piano with reverse threaded pins, which means 
that if the string has a tendency to unwind the pin, the pin digs in deeper 
into the block to arrest it. Now how about that for ingeniousity.......

However the piano was still a semi-tone flat!!!!!

AF
----- Original Message ----- 
From: "Alan" <tune4u@earthlink.net>
To: "'Pianotech'" <pianotech@ptg.org>
Sent: Sunday, March 27, 2005 9:01 PM
Subject: Aha! was flat facts


> 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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