Upright and Grand rims, was: Impressive Steinway Upright

[Tony Caught]

Yes Mike but if you make the string longer at the same frequency and the
string is thinner and at the same frequency, its another ball game.

An A85 note of 13.5 gauge that is 6CM long has a 60% of maximum tension of
79 kilo and is in tune at 71 kilo. 8 kilo below max recommended tension.
An A85 note of 13 gauge that is 7CM long has a 60% of maximum tension. of 75
kilo and is in tune at 91.52 kilo.  16.52 kilo above maximum tension.

The question was

"Why does the high treble scale not have slightly thinner, somewhat longer
strings? It seems to me that the short speaking lengths would contribute to
lack of sustain, excess hammer sound vs. musical tone, difficulty in tuning
etc"

The %ages have nothing to do with it.

Regards

Tony Caught
caute@optusnet.com.au


----- Original Message -----
From: "Mike and Jane Spalding" <mjbkspal@execpc.com>
To: "Pianotech" <pianotech@ptg.org>
Sent: Monday, September 16, 2002 10:58 PM
Subject: Re: Upright and Grand rims, was: Impressive Steinway Upright


> Alan, Tony,
>
> An interesting property of the equations is this:  At a given length and
frequency, the percentage breaking strength of the steel wire is constant.
You can vary the wire size to play with tension, inharmonicity, power and
impedence, but the percentage breaking strength does not change.
>
> FWIW
>
> Mike Spalding RPT