Moment of Inertia of grand action parts.

[Don A. Gilmore]

Oops.  I meant to write that w^2 would have units of radians^2/s^2, not
meters.  Sorry.

----- Original Message ----- 
From: "Don A. Gilmore" <eromlignod@kc.rr.com>
To: "Pianotech" <pianotech@ptg.org>
Sent: Saturday, December 27, 2003 9:20 PM
Subject: Re: Moment of Inertia of grand action parts.


> Hi John:
>
> Well, you did the math right and got the correct answer, but there are a
few
> minor discrepancies in your formulas in step 2.  Step 1 looks great.
>
> You state the formula for angular acceleration correctly, but you have
shown
> angular acceleration as w^2.  I'm assuming that this denotes angular
> velocity squared (I have been using w for angular velocity in my posts,
but
> it's usually denoted by a small omega, which looks like a roundish w).
> Angular acceleration is not the square of angular velocity.  If it were it
> would have the units "square meters per second squared".  Angular
> acceleration is usually denoted with a small alpha.  Also, you call the
> downward force F in the diagram, but N in the formula...just a typo.
>
> Otherwise it looks good.  I'm glad to see you convert newtons to kg-m/s^2
as
> this makes the units more understandable.
>
> Good job.
>
> 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 6:41 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?
> >
> >
> > O.K. Ron,
> >
> > I will send one at a time since the list seems to reject attachments
> > over 30 k.
> >
> > So here is the first one.
> >
> > 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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