On Wed, Jan 6, 2010 at 2:29 PM, Ron Nossaman <rnossaman at cox.net> wrote: > William Monroe wrote: > >> >> So in the end, I'm not entirely wrong, yes? At /f/ > >> or /ff/ blows, a heavier key stick would "resist" that initial change of >> direction that starts the key moving (and all subsequent changes in >> direction) more than a lighter key stick, right? >> > > Yes. The question is by how much relative to the hammer weight. > > OK. > > > If I get your meaning, it is more a question of usefulness, in that unless >> someone is playing rather heavy handedly (which an arthritic is not likely >> to be) the small changes of inertia we can affect would be inconsequential, >> and in fact be outweighed most of the time by the added DW, right? >> > > In my world, no, since I don't believe the "faster than free fall" thing. > My point is to not even consider the key leads until everything else in the > action is addressed. The current tendency to start with the key leads to > reduce inertia is, in my physics, backward. Excess leading will affect > repetition, because the repetition spring can only lift so much mass > quickly, but it's not the cause of down stroke inertial resistance at any > play level. Get the hammer weight and action ratio somewhere near right > first, then see what you need to do with the leading. > > Again, my call. > Ron N > Right. I wasn't suggesting starting with leading. From my initial post, my thinking was that after addressing all the other things I suggested (friction, hammer weight, geometry) that a reduction in inertia might give some relief. So it seems you're saying that if you've attended to everything else, a simple reduction in mass of the key stick won't gain you anything, correct? William R. Monroe -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100106/78a3c14a/attachment.htm>
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