<!doctype html public "-//w3c//dtd html 4.0 transitional//en"> <html>   Sarah Fox wrote: <blockquote TYPE=CITE>Hi Ric, > > 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. Ric!!!  ;-) Add/remove equal mass on *both* sides of the balance rail, so that BW remains the same.  Or compensate with assist springs to produce the same BW. Or compensate for a six-fold increase in BW by flying the piano to the moon. Or whatever...  I didn't mean to suggest changing balance weight!  I'm only talking about changing key inertia, while keeping all other things (including balance weight) equal. Peace, Sarah <a href="https://www.moypiano.com/resources/#archives"></a> </blockquote> Grin... ok... as long as we are talking about << both sides now >> ... Just keeping you on your toes as it twere....  I got a long post coming up ... and I am particularilly interested in what you and Mark have to say on the matter.... keep a look out for it. Cheers RicB   -- Richard Brekne RPT, N.P.T.F. UiB, Bergen, Norway <A HREF="mailto:rbrekne@broadpark.no">mailto:rbrekne@broadpark.no</A> <A HREF="http://home.broadpark.no/~rbrekne/ricmain.html">http://home.broadpark.no/~rbrekne/ricmain.html</A> <A HREF="http://www.hf.uib.no/grieg/personer/cv_RB.html">http://www.hf.uib.no/grieg/personer/cv_RB.html</A>  </html>