At 12:35 AM +0200 6/20/03, Richard Brekne wrote: >The whippen assist spring simply makes the whippen lighter by >pulling up against it from the whippen rail. This really does >something quite different. It provides a secondary support for the >weight of the action very much in the same sense that the >capstan supports the action weight. Under Newton's Third Law (Action and Reaction), the support for the force opposing the lifting of the spring is the action frame. Under your scheme, the support for the force opposing the magnets is the pianist's finger and hand. It doesn't sound as though the forces encountered in playing this action have been reduced by transferring them to something outside of the system of parts in motion (pianist included). But if you don't intend to counterbalance more than 5g of BW, this could be negligible. Bill Ballard RPT NH Chapter, P.T.G. "I gotta go ta woik...." ...........Ian Shoales, Duck's Breath Mystery Theater +++++++++++++++++++++
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