Breaking strengths / percents

[jkanter at rollingball.com]

Jurgen. may I have a copy of that table too?

thanks 'Jason

On 1/31/07, Jurgen Goering <pianoforte at pianofortesupply.com> wrote:
> Ric-
> I don't have a formula, but I do have a table with all the breaking
> strengths of Pure Sound Wire from # 7 through # 25.  Would that be
> helpful?  What sizes are you working with?
>
> Jurgen Goering
> Piano Forte Supply
> (250) 754-2440
> info at pianofortesupply.com
> http://www.pianofortesupply.com
>
>
> On Jan 31, 2007, at 11:00, pianotech-request at ptg.org wrote:
>
> > Hi folks I'm looking at how to compensate for use of pure sound wire
> > in spreadsheets for calculating scales.  I have the Tension bit
> > figured out, but I am unsure of how to deal with breaking tension and
> > % of that.  Roberts gives a simple 0.557*d^1.667  (d in mils) and
> > result in lbs.  This is for steel wire with an average density of 7.85
> > gm /cm^3 and an E modulus of 192 kN/mm2  Pure sound has an average
> > density of 7.87 and an E modulus of 187.5  What I need to know is what
> > the formula for % breaking strength for pure sound is.
>
> > Any help to get out there ?
>
> > Cheers
>
> > RicB
>


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