More on soundboard crown

[Ron Nossaman]

> > In a rib crowned and rib supported board, maybe 95%-100% of the stiffness
> > comes from the ribs. In a compression crowned board, probably somewhat
>over
> > 120% of the stiffness comes from the panel, since the ribs supply negative
> > stiffness and crown support. A rib crowned but panel supported board is
> > somewhere above 0%, and under 100%. And do forget about the arch. It still
> > doesn't work that way.
>
>Ron, what is a panel supported board?

Compression crowned, or rib crowned where panel compression is supporting 
most of the string load.

Ron N