Re: [PSUBS-MAILIST] Re:Pressure compensation

["Captain Nemo" <vulcania@interpac.net>]

----- Original Message -----
From: "Steve Lindblom" <s_lindblom@conknet.com>
To: <personal_submersibles@psubs.org>
Sent: Sunday, August 13, 2000 11:52 PM
Subject: [PSUBS-MAILIST] Re:Pressure compensation


"The guy I was talking to who sells DPV plans was telling me that the stuff
people he knows use is transmission fluid - thought he had no explanation of
why this should be better or worse than anything else."

Maybe.  But since some fluid will eat the seals if used in the wrong type
transmission, I'd want to make real sure about what I put into my motor
case.
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"BTW, I am beginning to wonder if people on this list may not be overly
enamoured of complexity. I find it amusing that one can get many responses
on oil filling trolling motors, or pressure balancing one using its own tiny
reg and tank, yet not a single bite for a discussion of plain old seals."

Actually, checking the archives, one might find quite a bit of discussion
regarding motor seals.  Worth a look.

And yes, perhaps we are an amusing bunch.  We have a lot of people here who
are at all different levels of involvement with submarines: from guys who
are on day-one of becoming interested, to the top pros in the field who have
made this their life.  What can I say?  We all like to knock ideas around
and see where they lead.

About seals: this is an item of interest to many experienced and neophyte
sub builder.  The problem is: many of us use Minn Kota motors, and are faced
with making them watertight at greater-than-design depths.  We've talked
about improved seals, pressure compensation, and fluid-filled housings as
possible remedies to depth-leakage problems.

If you can come up with any other suggestions about how we might beat this
gremlin, I for one would certainly be glad to hear them.

Very best regards,

Pat
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