Moment of Inertia of grand action parts.

[Don A. Gilmore]

Hi John:

I was following this one until I got to the algebra at the bottom.  In the
next-to-last line you seem to have factored out a 1/R^2, which I don't think
you can get away with since only one term has R^2 in it.  You can, however,
factor out V^2/2 to get

mgh = v^2/2 * (m + I/R^2)

This would solve to

v = sqrt [2mgh/(m + I/R^2)]

Hope this helps!

Don A. Gilmore
Mechanical Engineer
Kansas City

----- Original Message ----- 
[link redacted at request of site owner - Jul 25, 2015]
To: "Pianotech" <pianotech@ptg.org>
Sent: Saturday, December 27, 2003 6:45 PM
Subject: Re: Moment of Inertia of grand action parts.


> Don A. Gilmore wrote:
> > This one looks great, John.  Can you send me the other ones you
mentioned?
>
> Don,
>
> Here's number 2.
>
> Anyone bothered by this? Don and I could go off-line if the attachments
> are too much.
>
> John Hartman RPT
>
> John Hartman Pianos
[link redacted at request of site owner - Jul 25, 2015]
> Rebuilding Steinway and Mason & Hamlin
> Grand Pianos Since 1979
>
> Piano Technicians Journal
> Journal Illustrator/Contributing Editor
[link redacted at request of site owner - Jul 25, 2015]
>
>


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