[time-nuts] Thunderbolt stability and ambient temperature

Bruce Griffiths bruce.griffiths at xtra.co.nz
Wed Jun 10 19:32:50 EDT 2009

Chuck Harris wrote:
> Joseph M Gwinn wrote:
>> I read somewhere the suggestion to take the cast iron block from an
>> old automobile engine and put it in a heavy insulated wooden cabinet:
>> ~250 Kg of iron in an insulated box.  Cracked blocks are useless in
>> an engine, and so are available in junkyards quite cheap.
> Yes, but water is so much easier to find, and easier to
> package, plus it has a great storage capability.
> -Chuck Harris
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The thermal conductivity of cast iron is relatively poor for a metal.
Water has even lower thermal conductivity however this can be overcome
by stirring.


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