Is this sort of the poor man's accelerated action? ;-] David I. ----- Original message ----------------------------------------> From: V T <pianovt@yahoo.com> To: <pianotech@ptg.org> Received: Tue, 7 Sep 2004 18:42:43 -0700 (PDT) Subject: Half punchings on balance rail >Hello Bob, >That makes perfect sense - by changing the fulcrum >point, you are changing the overall action ratio. The >number of interest is the Balance Weight (DW+UW)/2, >and that has to drop when the action ratio drops. In >other words, it will take less force to push the key >down when the ratio is smaller. Note that the >friction, which is (DW-UW)/2, stays approximately >constant (very slight change). >Best regards, >Vladan >=============================== >Hi Jack! - couldn't resist, apologies. >The problem I've encountered thus far with the half >punchings is that this not only lowers downweight but >also lowers upweight significantly. Has this been >your experience? >Bob >--- JWyatt1492@aol.com wrote: >> Hello Bob! >> >> I have used this "center rail felt clipping" >> for years. I have found that it makes an >> average change of two to two and a half >> gram difference in the downweight. >> That is to the lighter side. >> >> I do not cut the hole out I just nip close >> to it. You can also use this method to >> even the downweight on a set of keys. >> >> I do not over analyze anything that is >> a fact, I just except it. >> >> Regards, >> Jack Wyatt > >_______________________________ >Do you Yahoo!? >Win 1 of 4,000 free domain names from Yahoo! Enter now. >http://promotions.yahoo.com/goldrush >_______________________________________________ >pianotech list info: https://www.moypiano.com/resources/#archives
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