It seems to me that because everything resists being moved (inertia) that acceleration probably takes place through the entire key stroke. I would guess that the first mm of movement doesn't achieve much for the reasons that have been discussed, namely the flexing, compacting of various parts. David Love davidlovepianos@earthlink.net > [Original Message] > From: Richard Brekne <Richard.Brekne@grieg.uib.no> > To: Pianotech <pianotech@ptg.org> > Date: 5/1/2003 4:01:16 PM > Subject: Re: Key Leads and Inertia > > Hmmm how to make this point.. > > John Hartman wrote: > > > Excuse me if am not understanding what you have written. You keep > > talking about momentum and I don't see much in the way of momentum > > taking place in the action. Things are accelerating and decelerating > > they are not just smoothy coasting along with constant speed.... > > If you have a key accelerated to a certain speed in the first mm of key > travel, it takes very little energy to keep it there... momentum... fine.... > Seems to me that when the key is engaged in most cases that the greatest > portion of its end velocity is reached within the first mm or so of key > travel. From that point on to the point where the key bottoms out on front > cushion, most of the work is already done, and the inertia of the key helps to > keep it that way.... no ?? So you may loose in the first ms, but you win the > rest of the way through.... or what ? > > RicB > > -- > Richard Brekne > RPT, N.P.T.F. > UiB, Bergen, Norway > mailto:rbrekne@broadpark.no > http://home.broadpark.no/~rbrekne/ricmain.html > > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives
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