Inertia, was "Grand Touch"

[V T]

Yes, this is the standard method of measuring the
moment of inertia.  One uses a calibrated spring and
measures the resonant frequency when the system is set
into motion.

Vladan

=============================
william ballard wrote:

At about the same time, someone else on PTx ( a David,
I believe)  
described a device which would read key inertia by
attaching it to a  
vertical, zero-friction spindle which was coupled to
springs.

Mr. Bill

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