Moment of Inertia of grand action parts.

[Ron Nossaman]

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>Is it so that this basic geometry is relatively the same for any action
>(grands) of the same size piano? Or possibly of all (grand) pianos?
>
>Paul Chick.

Hi Paul,
Relatively, in principal. The same sort of juggling of ratios and weights 
to find something that meets your requirements from what you have to work 
with and available parts applies to everything, and everyone seems to have 
a slightly different set of priorities and approaches. It's like scaling or 
anything else. You find the particular set of cumulative compromises that 
seem to you to be the best alternative under the circumstances. Or you can 
design and build a whole new action for each piano with a different set of 
cumulative compromises that seem to you to be the best alternative under 
the circumstances. We try to get far enough into the realm of diminishing 
returns that humans can't tell the difference between our intentions, and 
our results. Defining our intentions to meet all user requirements is the 
impossible part. The rest is just mechanics.

Ron N

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