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Date:      Thu, 22 Jun 2000 07:17:05 -0400
From:      David Jones <dej@inode.org>
To:        freebsd-hardware@freebsd.org
Subject:   Liquid cooled
Message-ID:  <00062207215406.00242@coup.inode.org>

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Be careful when liquid-cooling the payload.

Remember, the payload will be evacuated.  Water boils at just over 0 C in=
 a
vacuum.  If you use water cooling, then you'd get water vapor all over th=
e
place upon evacuation, with possible condensation everywhere.

Any cooling liquid would have to be kept in a closed system.

How is the payload to be powered up?  Does it run in "standby mode" until=
 and
during the launch, only to go into mission mode for those five minutes?  =
Is
there an external signal to indicate mission mode?  If not, then the powe=
r will
be dissipated while the system is on the launch pad, and no amount of liq=
uid
will help.


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