If I may try to answer my own question having read back through this thread. The stiffness of the panel is produced by applying whatever downbearing is required to achieve it. The difference being that the ribs take the stress of supporting the bearing over time rather than the panel and therefore the stiffness of the panel is likely to hold up for longer avoiding the inevitable compression set if the panel were supporting the bearing alone. OK. So do you then have to compress the RC&S panel more to achieve the same stiffness as the CC panel because the CC panel has a bit of a head start, as it were? And just how flat can you squash the RC&S board before you run the risk of a problem, assuming you think you might need to squash it flat in order to achieve a desired tonal quality. David Love davidlovepianos@comcast.net -----Original Message----- From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of David Love Sent: Sunday, February 13, 2005 9:05 PM To: 'Pianotech' Subject: RE: More CC vs RC questions was RE: Killer Octave & Pitch Raise Not to belabor this point, but just to clarify for my own understanding (because this point confuses me), if the ribsets support all the bearing as if the panel wasn't there, how does the panel achieve the requisite stiffness to do what it needs to do? David Love davidlovepianos@comcast.net -----Original Message----- From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of Ron Nossaman Sent: Sunday, February 13, 2005 8:13 PM To: Pianotech Subject: Re: More CC vs RC questions was RE: Killer Octave & Pitch Raise >AHEMMMMMMM! I believe you three are the only ones designing primarily rib >crowned and supported soundboards. But I do not think you three are the >only ones building that type! > >Geeeesh! I don't get no respect around here! > >Terry Farrell Yea, you're right, you got me. Clumsily worded - sorry. BTW, I got one of those pretty B panels you made for me ribbed Saturday with another of those rib sets designed to support bearing as if the panel wasn't there at all. Bridges are roughed in, laminate capped, and marked for drilling. Tomorrow afternoon, I'll locate them on the soundboard with the plate, and... I'm looking forward to hearing this one when it comes together. Ron N _______________________________________________ pianotech list info: https://www.moypiano.com/resources/#archives _______________________________________________ pianotech list info: https://www.moypiano.com/resources/#archives
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