Re: [PSUBS-MAILIST] Pressure compensation

["Marsee Skidmore" <heyred@email.msn.com>]

Light machine oil used to be whale oil. After they started using kerosene
(sp?) for lamps and spring steel for corsets, it was about the only thing
whales were good for. Then somebody discovered that jojoba bean oil was a
dead ringer for whale oil. Now the only thing that whales are good for is
cat food. - Joe

----- Original Message -----
From: <TeslaTony@aol.com>
To: <personal_submersibles@psubs.org>
Sent: Saturday, August 12, 2000 9:08 AM
Subject: Re: [PSUBS-MAILIST] Pressure compensation


> In a message dated 8/11/00 9:23:43 PM Pacific Daylight Time,
> protek@shreve.net writes:
>
> > Jon,
> >       You're right in that the mentioned method is a much better way of
> >  compensating.  I wonder if anyone has ever been successful at using a
low
> >  viscosity oil in a trolling motor.  It would be an interesting
experiment
> >  in the direction of a low cost compensated thruster.  It almost makes
me
> >  want to go get a trolling motor and experiment.  I wonder if the
armature
> >  would have too much drag against the oil and how much power you would
> loose
> >  in the process.  I would think that cooling would not be a big problem.
I
> >  would suspect that real thrusters for submersibles that are compensated
in
> >  this way have special armatures.  Probably the same oil used in
> submersible
> >  pump applications would work.
> >
> >  GB
> A good oil would be that oil that is used to lube guns and sewing
machines,
> it has a pretty low viscosity, lubes all the moving parts, fairly easy to
get
> (I dare you to find a hardware store that doesn't carry the stuff) and
should
> seal anything that arcs to prevent shorts. The biggest drawback would be
the
> quantities that you could buy it in since the biggest I have seen has been
4
> oz. (although you probably could get bigger).
>
> Anthony
>
>