Streinway "Accelerated action".

[gordon stelter]

This may not be sometrhing that can easily be
measured, but I am quite certain that it is something
that a pianist can feel, i.e. 3 separate fulcrums per
keystroke, vs 1.
     Thump

--- Ron Nossaman <RNossaman@cox.net> wrote:
> 
> >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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