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Article #7144

Re: Lubrication problem (was Re: Galileo Stuck Ribs / Remote Manipulator?)

#7144
From: Henry Spencer
Date: Wed, 27 Jan 1993 08:07
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In article <1993Jan14.175452.1@fnala.fnal.gov> higgins@fnala.fnal.gov (Bill Higgins-- Beam Jockey) writes:
>> Who told you that loss of lubricant was the problem?  How about a
>> broken or cracked rib, or some other less obvious reason for the
>> jam?
>
>Loss of lubricant during truck travel is the best guess of Galileo's
>engineers...

It's important to note, though, that it remains only a theory, not an
established fact.  What's more, this theory seems rather low in predictive
power:  the same folks who told us that loss of lubricant was probably
the failure mode also told us that the heating/cooling turn sequence
would probably work the stuck ribs loose.  It didn't.

This is not to say that I have any better ideas, but do bear in mind
that the hard evidence is slim and our experience with such failures
essentially nonexistent.
-- 
"God willing... we shall return."       | Henry Spencer @ U of Toronto Zoology
       -Gene Cernan, the Moon, Dec 1972 |  henry@zoo.toronto.edu  utzoo!henry
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References: <9JAN199318252344@kelvin.jpl.nasa.gov> <1993Jan13.064524.13581@mr.med.ge.com> <1993Jan14.173050.20146@ke4zv.uucp> <1993Jan14.203635.21807@cbfsb.cb.att.com> <1993Jan14.175452.1@fnala.fnal.gov>

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From: henry@zoo.toronto.edu (Henry Spencer)
Subject: Re: Lubrication problem (was Re: Galileo Stuck Ribs / Remote Manipulator?)
Message-ID: <C1I6KL.It5@zoo.toronto.edu>
Date: Wed, 27 Jan 1993 08:07:31 GMT
References: <9JAN199318252344@kelvin.jpl.nasa.gov> <1993Jan13.064524.13581@mr.med.ge.com> <1993Jan14.173050.20146@ke4zv.uucp> <1993Jan14.203635.21807@cbfsb.cb.att.com> <1993Jan14.175452.1@fnala.fnal.gov>
Organization: U of Toronto Zoology
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