>Personally, I'm not convinced that S&S's accelerated action really does >anything. The shift in fulcrum would be miniscule, hardly enough to make >any sort of measurable difference in either the action ratio or the key's >moment of inertia. There would *technically* be shifts in these values, of >course. Technically, the mechanical advantage over the capstan end would >decrease as the key is depressed. Realistically, the effective fulcrum point is going to shift more rocking a flat key across a well compressed flat punching than across a half round dowel. Maybe the benefit is that the fulcrum point *doesn't* move, and the key leverage *doesn't* change as much through the stroke. Ron N
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