> Dear Everyone, > Today I spoke with one of the most utterly > respected bellymen, frequently published in the > Journal and in a "position" to know PLENTY about old, > pre - AMPICO Knabes...... > Well, HE said, after examining these wide, fat, > shallow ribs upon removal from old boards, that they > ARE "rib-crowned"! > And so, perhaps, also with my Ivers and Pond, and > Packard ??? > So much for the notion that these ribs are, by > necessity, flat...... > > Peace, > G I replaced the board in an old Knabe grand a few years back. The top four treble ribs were not only crowned (about 4 meter radius, at that), but laminated. I couldn't tell whether any of the other ribs were crowned, but the board was concave under bearing load. There's a difference between rib crowned and rib supported. These boards are still primarily panel supported, crowned ribs or not. > P.S. I'm now wondering if the grain orientation on > these ribs is such as to better lend themselves to > elasticty. > Just a "hunch". Do some deflection testing and find out instead of sitting there "hunching". Ron N
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