[PSUBS-MAILIST] Thruster Reliability

[Alec Smyth via Personal_Submersibles]

Here's my inspiration. I've seen several original Kittredge subs still
kicking with their original 1-atm, ceramic seal thrusters that are probably
40 years old. Their use is occasional, for sure, but they're maintenance
has probably been zero. What I'd like to explore is doing what the Captain
did, except with a Minnkota. If the bushings and brushes are dry and in 1
atmosphere, with the normal lubrication (a little grease on the bushings,)
then I don't see why they can't have the same life as when they go fishing.

On Tue, Jul 25, 2023 at 7:53 PM Alan James via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Thanks for the credit Alec, I think it was Brian Hughes idea
> from a previous discussion. Glad we are making some progress.
> As far as the oil / air debate is concerned, I believe Carsten said that
> you only need a few drops of sea water into an air compensated thruster to
> wreck it, whereas if there is oil in there the water doesn't do the same
> damage.
> Your compensator can be used as an air over oil system.
> You could even run 2 thrusters off the same compensator as a test. One
> with oil, one just air.
> Alan
>
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>
> On Wed, 26 Jul 2023 at 11:19 am, Alec Smyth via Personal_Submersibles
> <personal_submersibles at psubs.org> wrote:
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