Internal damping is good becasue we don't need a plate with any portion of it having a specific resonance augmenting a specific partial series, right? Broadwood used steel on their "barless grand" why not ask them why it is no longer built? --- Newton Hunt <nhunt@optonline.net> wrote: > Sure it has a lot to do with why it is in pianos. > If it were hard to > machine and if it was expensive it would not be in > pianos. The other > reason is that it has proven it's merit for our > purposes and those who > chose a different material have ended up regretting > it. I am sure there > were lots and lots of plate failures before they got > the specs right. > > Lots of luck. > > Newton > > > Delwin D Fandrich wrote: > > > > And If I haven't created enough confusion yet, > I'll toss out another > > one: > > > > Just why do we think gray iron is the best of all > possible materials > > to use for piano plates anyway? What is it about > gray iron that is so > > special? > > > > We say it is extremely rigid -- but it is not. > It's brittle. Is this > > an advantage? > > > > We say it has excellent internal damping > characteristics -- but is > > this an advantage? Why? > > > > Right off hand I can think of only two > characteristics that make it a > > particularly good choice for piano plates: [1] It > is easy to machine > > and [2] it is cheap. Neither of these has anything > to do with its > > performance in the piano. > > > > Del > > > > > > > __________________________________________________ Do You Yahoo!? Yahoo! Finance - Get real-time stock quotes http://finance.yahoo.com
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