V Pro discussion

[Newton Hunt]

>  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