[PSUBS-MAILIST]Seals (was Pressure compensation)

[s_lindblom@conknet.com (Steve Lindblom)]

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

Been there. That's got me started on this, as I said in my first post, I
had gone through the archives, and that while there was a lot of discussion
of seals and troller motors, it never seemed to get down to specifics or
reach any conclusions so that their was very little hard info to be gained
from it - people said they were using Minn Kotas, but not how long for, how
deep or what they were doing about seals. Other people recommended specific
seals but without saying whether they had actually tried them.  Etc, etc.

>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.

My point exactly. If it is a matter of such interest, and if so many people
are using these motors, I'd think it would make sense to nail down whether
seals can do the job, and if so, what seals, before moving on to esoteric
solutions. My suspicion is that they will, certainly to the depths that
most of us are concerned with. I have no objection to doing some
experimentation myself, but hate to always be wasting time reinventing the
wheel, hence my original questions:


Is anyone here sucessfully using a trolling motor on a sub, ROV or DPV?

If you are, how are you keeping the water out?

Is it working?