At 10:41 AM -0400 4/22/03, John Hartman wrote: >I don't' think you can get an even inertia in the action from bass >to treble unless you make the hammers the same mass. Or compensate >for the mass difference somewhere else. I don't think getting the >action to have the same inertia in the bass and treble is the point. >Getting it even from note to note and not making it excessive would >be the objective. So why wouldn't Rick Baldassin's trick work The heavier weight of the bass hammers are applied to the capstan, which is on the far side of the key. If what you're looking for is that the total weight on either side of key #88 (FW + back leading + Top Action Weight) be the same as on key #88. And this could be set up to maintain a constant BW. Of course, there would be the small matter that the extra weight on the backside of #1, when reproduced on key #88, had simply been moved from hammer #1 to the backleading on key #88. The inertia and the gravity might be the same, but note #88 would behave a little differently considering that key #88 lacked the coupling of key #1, where the weight was sitting on the capstan and residing in the parts above. That could be taken care of be wrapping 6g (or whatever specified amount) of lead solder wire around hammershank #88, in place of the aforementioned backleading. Bill Ballard RPT NH Chapter, P.T.G. "I gotta go ta woik...." ...........Ian Shoales, Duck's Breath Mystery Theater +++++++++++++++++++++
This PTG archive page provided courtesy of Moy Piano Service, LLC