Stephen Birkett wrote: > > > Some years back when the list was still innocent we had a discussion of > inertia. I recalI pointing out the discrepancy between static balance > which depends on the distance to the fulcrum and inertia which depends > on the square of the distance. > > Some might argue that the "assistance" provided by the lead in "soft" > playing actually makes the action MORE difficult to control. > > Stephen > Stephen, Thanks for sharing this with us, your insights are very helpful. Maybe you can clear something up for me. In the real word actions and other machines have friction. Let's say I measure a note on a grand action and find that there is 12g of friction measured statically (D-U/2). When the action is played through its dynamic range does the friction go up proportionally to the increased force applied to the key? 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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