Richard Brekne wrote: > John Hartman wrote: >>45*980gm/sec^2 - 10*908gm/sec^2 Sorry, It should be: 45gm*980cm/sec^2 - 10gm*980cm/sec^2 Which is the force (balance weight times gravity) needed to put the action into equilibrium (assuming no friction as usual). John Hartman RPT John Hartman Pianos [link redacted at request of site owner - Jul 25, 2015] Rebuilding Steinway and Mason & Hamlin Grand Pianos Since 1979 Piano Technicians Journal Journal Illustrator/Contributing Editor [link redacted at request of site owner - Jul 25, 2015]
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