--- Phillip Ford Piano Service & Restoration 1777 Yosemite Ave - 215 San Francisco, CA 94124 On Fri, 07 Dec 2001 23:17:19 Richard Brekne wrote: > >Is there any rule of thumbs about maximum back >lenghts ? Effects caused by pushing that evnt. border ? >Richard Brekne This is an interesting question. Most of what I have seen on the subject seems to indicate the more the merrier. And probably anyone actually building a piano isn't going to explore the upper limits because they aren't going to put a 2 foot backscale in a 6 foot piano for various reasons such as it doesn't look like anything you've ever seen before. I assume that you get more flexibility or freedom of bridge movement as you make the backscale longer. But it's probably not a straight line relationship. It's probably a curve that starts off steep at first and then starts to roll over and eventually levels off (becomes asymptotic if you like). It would be interesting to know where this curve levels off. Also I'm assuming that the backscale cannot get too long. You just stop getting any benefit after some point. But I don't know this. Maybe there are some negative consequences of making it too long (other than it just taking up a lot of space). I await the results of your research project. Phil F --- Phillip Ford Piano Service & Restoration 1777 Yosemite Ave - 215 San Francisco, CA 94124
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