Re: "memory" effects in a spinning rotor

top9@xxxxxxxxx wrote:

http://www.oswirus.krakow.pl/cat_14/gyroscope/

A symmetric harnessed gyroscope accelerated to a given spinning
frequency takes different time periods to stop, depending on the
direction of previous spins.

That's a poor metric, because time-to-stop is essentially
a bearing friction effect. Lots of things could explain
that, such as bearing surface morphology or magnetization
of the bulk material of the bearing.

If you're using a gyroscope, a good metric would be
something like the forces experienced by the gyroscope.
In this case, the fact you are using a gyroscope seems
to be almost incidental. If you wish to pursue this
line of research, I suggest that your next experiment
should eliminate the gyroscope and only use the bearing,
perhaps scaling up to a larger bearing which presumably
would show a larger effect. However, I'm not sure that
memory effects in bearings would be very interesting,
and it certainly would not be relevant to physics.
.

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