string settling

[Isaac OLEG]

Ron, again, the problem is that string stretch too slowly, not the
opposite !

Bests.

Isaac OLEG

Entretien et reparation de pianos.

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> -----Message d'origine-----
> De : pianotech-bounces@ptg.org
> [mailto:pianotech-bounces@ptg.org]De la
> part de Ron Nossaman
> Envoye : samedi 12 juillet 2003 23:53
> A : Pianotech
> Objet : Re: string settling
>
>
>
> >     I don't think the pin moves at all, there is not that
> much force
> >available.
>
> And even if it did, the effect is still real, and the
> numbers are scary -
> if I did it right. A 400mm speaking length of #17 wire
> tuned at 440cps is
> at about 168.5 lbs of tension. Add 0.03mm (0.0011") to that
> speaking length
> and the tension drops over 2.5 lbs, dropping pitch to 437.
>
> It doesn't take much movement to make a big difference, and
> that's not
> strings stretching over time.
>
> Ron N
>
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