Crown on Compression Boards

[Ron Nossaman]

> So the equivalent of about a 60’radius?  Will the smaller ribs of the 
> upper end of the piano, then, yield a tighter radius when forced into 
> bending mode or is it about the same proportionately?


If the treble is thinned, less. Even so, a 60' radius will get 
you about 0.3mm of crown.
Ron N