The reason that I remember a hard vacuum is not used is because
the low pressure is used to rate the pendulum (fine tune) by slightly
increasing or decreasing,
and in a hard vacuum metals tend to weld together and oils evaporate
so the mechanical bits seize
up.
cheers, Neville Michie
On 12/01/2010, at 2:04 PM, Hal Murray wrote:
[email protected] said:
Also, according to some info I read on pendulum clocks, vacuum does
not work because some viscous drag is needed to damp the free
pendulum;
Why do I need damping?
I thought the general idea on oscillators was to get the highest Q
(lowest
damping) that was reasonable. But now that I think about it, I'm
not sure
why.
--
These are my opinions, not necessarily my employer's. I hate spam.
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