stretching wire

[Ron Nossaman]

> Just a non-scientific inquiry here, but if the wire stretches any 
> perceptible amount, wouldn't the diameter decrease?  

Yes, it should, but any stretch, long or short term, would do 
that.


>Even wires adjacent 
> to broken, 100-yr-old strings generally mic right on. 

I doubt that any of us piano bashers have the tools with the 
necessary accuracy to measure it.


>Presumably, again 
> using unscientific notation, that is a specification for piano wire 
> steel... that is, to be able to resist stretching and the resulting 
> diameter decrease.
> Paul Bruesch
> Stillwater, MN

Try this.
http://en.wikipedia.org/wiki/Poisson's_ratio#Width_change
Ron N