Subject: Re: Upright and Grand rims, was: Impressive Steinway Upright

[Vanderhoofven]

If you take a given piano (for example, a certain Steinway and Sons S that 
I know of) and take a given pitch in the high treble (notes A7, A#7, B7 and 
C8 for example), and if the speaking length of these notes is 
increased,  there is a point at which the wire for these notes is exceeding 
the breaking point when the string is at the correct pitch.

There is a limit to how long the top treble strings on a piano can be 
before they will break.  If the speaking length is too long, using slightly 
thinner strings will not prevent the strings from breaking.  Also, using 
slightly thicker strings will not prevent the strings from breaking.

I don't know if short string lengths in the high treble cause aony of the 
problems listed below.

Just my two cents

David A. Vanderhoofven
Joplin, MO


At 08:21 PM 9/16/02, you wrote:

>Date: Tue, 17 Sep 2002 10:53:43 +0930
>From: "Tony Caught" <caute@optusnet.com.au>
>To: "Mike and Jane Spalding" <mjbkspal@execpc.com>,
>    "Pianotech" <pianotech@ptg.org>
>Subject: Re: Upright and Grand rims, was: Impressive Steinway Upright
>
>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