Bill Ballard wrote: > What I'd like to know is, if the helper springs really > make the SWs seem smaller, how is the dynamic behavior of a spring > balanced action different from one with simply, equivalently light > hammers. Center of mass is going to be in different places throughout the stroke, perhaps have a different movement pattern or curve to it, and the amount of mass and accompanying intertia will vary. Friction at the knuckle will be less in the light hammer action, hammer wont yank at the center pin quite so much. All these things and more are bound to be translated one way or another through the rest of the action and out the fingers. Pianists would say it "feels different" Just how the coupling between the whippen and key is affected is interesting, and I thought might be real interesting to look at in a comparison between key magnet assist, and whippen assist. To get the same BW the weight at the capstan will have to be increased if the assist is done at the key > (Obviously I'm not interested in the sound of a hammer which > is 10-15g lighter; practically it doesn't exist.) The coupling > differences of springs and magnets aside, I believe they would behave > similarly, directly and immediately reducing the force of gravity, > and to the extent that we removed FWs whose work was now being done > by helpers, reducing the force of inertia. > > I think that would be worth a couple of oatmeal cookies. > > Bill Ballard RPT > NH Chapter, P.T.G. > -- 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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