Hi Fred, I should think that the magnetics suffer from the inverse square law. Anyone know of a similar "ratio" for springs? At 03:22 PM 1/6/2004 -0700, you wrote: Both are fairly >static sources of energy (the wipp assist spring de-compresses very little, >hence its available energy remains fairly constant throughout an action >event. As does the force of the underkey magnets, since the distance >doesn't contract that much). Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T. mailto:pianotuna@accesscomm.ca http://us.geocities.com/drpt1948/ 3004 Grant Rd. REGINA, SK S4S 5G7 306-352-3620 or 1-888-29t-uner
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