[CAUT] Wire Stretch

[Ron Nossaman]

> The ribs are shorter in the 20% of bridge length and the frequencies are 
> much higher.
>  
> I don't think of it as downbearing pressure but contact or 
> coupling pressure. 

I think of it as downbearing pressure, since the coupling 
action and pressures are far greater from the bridge pin slant 
and offset angle than they are from downbearing. A soundboard 
assembly relying on panel compression for stiffness requires 
enough downbearing to put the panel fiber at it's compression 
limit to make it stiff enough to work well and produce the 
desired tone. The downbearing schedule, or ranges, you can get 
away with on any given assembly depends on the soundboard 
design and scale tensions. With reasonable pin and offset 
angles, the coupling is adequate in any case.

Ron N