R,C&S question

[alan forsyth]

"In  RC&S, panel compression isn't needed at all to support crown,
because the number and stiffness of the ribs will support
bearing without it,....."

Strikes me that if the rib set alone is able to support crown and 
downbearing, theoretically then a much thinner panel can be used which has 
the added benefit of being lighter and therefore making the whole assembly 
much more reactive to vibration. I have seen a soundboard with panels as 
thin as 1mm, but glued to both the top and the underside of the ribs. I 
suppose then that compliance (impedance) might become an issue.

AF



----- Original Message ----- 
From: "Ron Nossaman" <rnossaman at cox.net>
To: "Pianotech List" <pianotech at ptg.org>
Sent: Thursday, January 24, 2008 6:51 PM
Subject: Re: R,C&S question