>>If one is using > > straight ribs and compression crowning (I am), does pressing into a curved > > surface have any material effect on the crown or is Jack Krefting correct > > when he stated in one of his series of articles that it does not. > > Huh? Of course it will have an effect on the resulting crown. > Del >There isn't any real >difference between a crown being achieved by >pressing panel and straight >rib into a curved caul, and one resulting from >rehydration of a severely >dried panel glued to a flat rib on a flat caul. >Ron N >If you induce a curve to two thin pieces of >wood and glue them together in the curved state, >THEY STAY CURVED. Unless >piano soundboards follow some other natural >principals, my guess is that is >DOES matter. >Terry Farrel PTJ, 7/87, page15 "Incidentally, it does no good at all to have a bellied press and then use flat ribs; if you aren't going to crown the ribs, you might as well use a flat deck and cook the board a bit more." Jack Krefting So.........Which is it, and why? Garold Beyer
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