David Love wrote: <In this case the key travel/hammer travel relationship is not consistent with the actual action ratio no matter how you measure it. That is the crux of the matter. Doesn't make sense... How about looking at the profile of the balance rail, and/or the profile of the shoe or however the balance hole is arranged. The theoretical pivot at the balance rail, can be different, unto quite different from the actual way the key pivots at the balance point, depending on how the rail/shoe is profiled. If the geometrical numbers don't line up, some pivot somewhere, must be actually pivoting in an unexpected way. Jim Ialeggio -- Jim Ialeggio jim at grandpianosolutions.com 978 425-9026 Shirley Center, MA
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