[time-nuts] Re: in-ground clock room

[Adrian Godwin]

Doesn't that depend on the configuration of the fields ?
For instance, a pair of facing like poles will repel and, as you say, make
a good spring.
But a magnet falling down an aluminium tube will go slowly, because of the
generated eddy currents and their subsequent fading due to the lossy
aluminium.


On Sat, Sep 11, 2021 at 2:02 PM Poul-Henning Kamp <phk at phk.freebsd.dk>
wrote:

> --------
> Gilles Clement writes:
>
> > Magnetic levitation, dampening external vibrations ?
>
> By theselves magnetic fields are just really good springs.
>
> To get any kind of dampening you either need to add a
> dash-pot (=shock-absorber) as a dissipative device or
> you need to modulate the magnitic field to emulate
> the same result.
>
> I'm told the latter is much harder than it sounds.
>
> --
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG         | TCP/IP since RFC 956
> FreeBSD committer       | BSD since 4.3-tahoe
> Never attribute to malice what can adequately be explained by incompetence.
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