[pianotech] scaling

[Ron Nossaman]

> Ok so I refer to some books, pull out some formulae and get garbage for 
> results no matter what formula I use.  I even got my nerdy brother to 
> help and I'm afraid that just generated more questions and no foward 
> movement.  (he's an engineer)

Ah, there's part of the problem. <G>


> "The Calculating Technician" and "A Restringing Guide" are two books 
> I've pulled formulas out of so far.
>  
> A440 note number A49, length of 15.75 inches and A220, note A37 length 
> of 29.375 inches are two notes I've used just to get the formula up and 
> running.  I should have a string tension of somewhere in the 
> neighborhood of 160  (155 to 170 roughly) and I'm so far off using ANY 
> formula that there's something amiss somewhere.

Define "something", and "somewhere". My crystal ball is 
recession sensitive. It only works when the cash is pouring in 
the windows faster than I can shovel. Not just yet, in other 
words.

This is a relatively short scale, where 150lbs per wire string 
looks more in the ballpark. I'd say hire someone conversant in 
scaling to build one from ALL available measurements, like ALL 
speaking lengths and core/wrap diameters from the bass strings.

Or guess.
Ron N