Maximum tension

[Kristinn Leifsson]

Great,

thank you very much.  

I won´t ask about A1 on a Steinway D.

Kristinn Leifsson,
Reykjavík, Iceland






At 22:42 21.5.2000 EDT, you wrote:
>> I don´t have anything specific in mind, just thinking.  
>> Let´s say size 13 in a Samick 118 cm upright.
>> 
>Don't know anything about the Samick. But let's say 0.88 mm Roeslau wire, 
>which, according to my chart, has a breaking tension of 2220 MPa. Typical 
>speaking length is 50 mm at top C. So breaking pitch would be about 4 
>semitones higher. Now that is not to say it will break at E above pitch. 
>The wire will hit the plastic zone first. In old wire the plastic zone is 
>always *very* close to breaking because of the way it was drawn...not 
>sure how close they are with modern high carbon steel, which undergoes 
>many strange processes as it's made. Anyway, you can be reasonably 
>certain you coudln't exceed e, but probably less.
>
>Stephen
>
>Stephen Birkett Fortepianos
>Authentic Reproductions of 18th and 19th Century Pianos
>464 Winchester Drive
>Waterloo, Ontario
>Canada N2T 1K5
>tel: 519-885-2228
>mailto: birketts@wright.aps.uoguelph.ca
> 
>
>