Newton Hunt wrote: > > These casting methods are superb for producing economical internal combustion engine blocks, but > > for quality piano plates they are unacceptable." > > The only way to test his assertion is to make two plates, one cast in > vacuum and cooled slowly and one cast in the vacuum process and test > their energy damping characteristics. > > Comparing the characteristics of two separate plate designs is > inherently impossible. Far too many variables as to metal content, > thickness, strut placement, etc., etc. > > Hence Ed's contention is insupportable. > > Newton Hmmm.... nor is it refuted. I am not anykind of an expert in this area, yet I know Ed personally and he generally knows a bit about what he is talking about. Rarely makes assertions without some kind of hard knowledge. That being said, I have always had the impression that Yamaha has a bit of a metalic sound, which seems to fit his point. Tho I will be the first to admit that this sound is much less "present" in the pianos coming out of Yamaha these past few years as it had been some years ago. Ed's contention is interesting, and it would explain a lot of things. (why for expample other factories in the face of otherwise overwhelming economic reasons would not retool, in spite of that cost). In any case Ed's view seems to be shared in so many words by many of the reps from European factories I have met. Richard Brekne I.C.P.T.G. N.P.T.F. Bergen, Norway
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