Mark Davidson wrote: > So I guess I agree with 1 and 2, but for 3 and 4 we need to define > "efficiency" before we can talk about whether it stays the same or not. > > -Mark Mark, Well it looks like you are half way there. What I mean by efficiency is how much force is applied to the string by the hammer in relation to how much force is applied to the key by the player. The closer the input is to the output the more efficient the action is. Hope this helps. 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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