Inharmonicity factors

[Cy Shuster]

Wow... are current U3's (or U5's) still like that?  Thanks for the answer!

So wrapped strings on the treble bridge lead to that "hockey stick" treble 
bridge shape, since the wrapped strings have to suddenly become shorter?

--Cy--

----- Original Message ----- 
From: "Overs Pianos" <sec@overspianos.com.au>
To: "Pianotech" <pianotech@ptg.org>
Sent: Wednesday, May 04, 2005 6:31 PM
Subject: Re: Inharmonicity factors


> Hello Cy,
>
> Very 'funny' as it happens.
>
> Your measurements are not an aberration. The Yamah U3 is an example of an 
> instrument which was 'designed' with covered notes on the lowest notes of 
> the long bridge. It is impossible to achieve a smooth transition without 
> reducing the speaking length of the covered strings.
>
> A better scaling solution for a 131 cm upright would be to move the cross 
> up to D#29/D30, which would allow for all wrapped strings to be placed on 
> the bass bridge. A satisfactory speaking length reduction in the bass 
> would result in a very nice transition. But the conservatism of many 
> factories won't allow them to move the break up. There's nothing magical 
> about breaking at B27 in a 131 cm upright piano.
>
> Ron O.
> -- 
> OVERS PIANOS - SYDNEY
>    Grand Piano Manufacturers
> _______________________
>
> Web http://overspianos.com.au
> mailto:ron@overspianos.com.au
> _______________________
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives
>
>
>