>But your question remains unanswered: just what kind of curve results from >this bending technique, and what are the implications of ribs with such a >curvature? > >Terry Farrell I wasn't worried about the performance effects from a rib made this way. I doubt that any difference is detectable audibly from ribs curved by constant radius, parabola, or catenary. I do find it curious that the curve described by the bend doesn't seem to have a name. There is math describing it, in the formula for finding the deflection at a given point on a center loaded end supported beam. Considering how many drawings have been produced through many many years by bending a wooden spline between points to describe a curve, I would have thought the curve would have a name. It doesn't seem to. Ron N
This PTG archive page provided courtesy of Moy Piano Service, LLC