<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body bgcolor="#ffffff" text="#000000"> Hi JD.  I think David Love counts himself as one of these fellows.  I point you to the following post made earlier in the present discussion... thats where I get the figure of 25% remaining crown. Of course no one as specifically said that  such short ribs with such tight radii are pressed so low... but glance at the post and you'll see where my querrie comes from. <a class="moz-txt-link-freetext" href="http://ptg.org/pipermail/pianotech.php/2008-January/216264.html">http://ptg.org/pipermail/pianotech.php/2008-January/216264.html</a> I'd agree with your last paragraph below... along with rib dimensions and expected amount of residual crown after downbearing is applied. Cheers RicB <blockquote> <blockquote> At 09:38 +0100 27/1/08, Richard Brekne wrote: >...there is a stated goal of applying enough downbearing so that 25 >% of the unloaded crown remains after stringing. </blockquote> First of all, I won't question this figure simply because I haven't time to trawl the archives for a statement to this effect, but it would be good to have confirmation from one of the practitioners that this is so.  It seems unlikely if I'm not mistaken in what follows. I think it would be useful first to have a true figure from one of the RCS-heads for the radius of curvature  of the belly at a point where the rib is say, 1 metre long instead of the extreme cases given by Terry F. and Ron N. .... </blockquote>           JD </body> </html>