John Patton wrote me a year or so back when I asked him about this and said then that Steinway dries their boards down to about 4% and uses machine crowned ribs. FWIW. Do I understand correctly that the rib crowned board will sooner or later also surcomb to more or less the same self destruction, but that essentially it will just take much more time for it all to happen ? RicB Delwin D Fandrich wrote: > A few, and I suspect Petroff is among them (though I've not visited their > factory so have only the visual evidence of their finished soundboards to > go by), seem--as you suggest above--to keep a foot in both camps. They dry > their board way down to compression-crowning levels and they crown their > ribs. At least a little bit. The only good thing to be said for this > practice is that even though the soundboard panel will eventually > self-destruct the system will retain some crown as it does so. > > Del > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives -- Richard Brekne RPT, N.P.T.F. UiB, Bergen, Norway mailto:rbrekne@broadpark.no http://home.broadpark.no/~rbrekne/ricmain.html http://www.hf.uib.no/grieg/personer/cv_RB.html
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