Key Inertia

Richard Brekne Richard.Brekne@grieg.uib.no
Thu, 18 Dec 2003 14:35:44 +0100



Sarah Fox wrote:

> First apply force to a heavy keystick.  It goes into slow motion.  The
> hammer hits the string in slow motion.  Everything is slow.  Not much energy
> transferred to the string.
>
> Now remove keystick mass.  Less mass means the key/action moves faster with
> the *same force*.  That means the hammer moves to the string faster and
> strikes the string harder.  More energy transferred to the string for the
> same amount of input energy (again, equal to force times keydip).  That
> makes it more efficient.

Wait a second here.... I'll buy if this if you get past gravitional
acceleration, but until that point, *same force* from the  finger will not
result in the hammer moving faster...  everything will get slowed down... finger
including.




--
Richard Brekne
RPT, N.P.T.F.
UiB, Bergen, Norway
mailto:rbrekne@broadpark.no
http://home.broadpark.no/~rbrekne/ricmain.html
http://www.hf.uib.no/grieg/personer/cv_RB.html



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