---------------------- multipart/alternative attachment In a message dated 7/12/2002 4:20:20 PM Pacific Daylight Time,=20 Richard.Brekne@grieg.uib.no writes: > Subj:Re: Lighter or Heavier ?=20 > Date:7/12/2002 4:20:20 PM Pacific Daylight Time > From:<A HREF=3D"mailto:Richard.Brekne@grieg.uib.no">Richard.Brekne@grieg.u= ib.no</A> > Reply-to:<A HREF=3D"mailto:pianotech@ptg.org">pianotech@ptg.org</A> > To:<A HREF=3D"mailto:pianotech@ptg.org">pianotech@ptg.org</A> > Sent from the Internet=20 >=20 > Hey Ric I followed this only briefly. Bussssy week. Oh my goodness! Any way=20 There is an experience I've had a few times with some actions where the key=20 ratios and action ratios were really good. Without getting into many=20 measurements just let me say that the effect was that even though static dow= n=20 weights approached 60 down on my Symphony Stwy D (1940) and the upweights=20 were a nice snappy 28-30. No one has ever complained about the touch as bein= g=20 heavy.=20 John O' Connor played it a time or two as well as others. and never a=20 complaint about the touch being heavy. Seems to handle rapid passage work=20 effortlessly. It has some lead closer to the balance rail as it's a=20 accelerated action. =20 I've also learned from installing new key sets with corrected key=20 ratios that less lead is used and similar results are attained. I believe =20 some lead is required to give the piansit some semblance of a "the normal=20 feel" related to inertia and that some inertia IMO is desirable in a piano=20 action. Physics says were going to have some like it or not but is better=20 managed with efficient leverages. When some of these systems are right it's= =20 like a supercharged V-8. My point is that the down weight upweight discussion takes on an entirely=20 different parameters when things are set up right as opposed to the funky ke= y=20 and action geometry we deal with day in and out. Bottom line is that some=20 action.key systems static weights may seem high ( 60 over 30 ) but the=20 dynamic effect when the keys are in motion tells an entirely different and=20 pleasant story. Does that make sense to any one but me? >>>>Dale Erwin>>>>>>> >=20 > Thanks again Ed and Dave... and St=E9phane for your interest >=20 > Seems like we have two ideas about how inertia levels affect > the touch of the piano. On the one hand we've said several > times the the higher the inertia the slower the action > repetition... and this has been equated loosely with terms > like sluggishness and then from this perspective, heaviness. > Then on the other hand a bit more lead is said to perhaps > lead to a lighter "feel" due to the help inertia lends ones > the key is in motion. >=20 > Interesting and to some degree conflicting lines of > thinking. All and all it leads one to think that Stanwood > ideas are fine.... a great refinement in relation to simple > DW/UW measurements.. but perhaps should be refined further > to somehow put a number on inertia .... inertia zones > perhaps. >=20 > I agree tho in the answers you two kindly voluntered that > DW/UW has a direct relationship to "touch" or "feel", yet > that these are also affected by other relationships.=20 >=20 > Thanks again... would have liked to heard from others... > but. :) >=20 > Cheers > RicB >=20 ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/3a/fb/43/47/attachment.htm ---------------------- multipart/alternative attachment--
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