RE: [PSUBS-MAILIST] motor thought

["Jon Wallace" <jonw@whoweb.com>]

Dan,

No, it's not to avoid a pressure compensated motor, it's to reduce the
overall amount of setup and maintenance for a multi-engined sub.  If I could
have one pump that redirected water flow to multiple jets, or turbines, then
I'd only have to worry about pressure compensation for one device.  ie,
compensating one motor rather than four.

Jon




-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]On Behalf Of Dan H.
Sent: Saturday, April 08, 2006 10:09 AM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] motor thought


John,

If you using a pump to avoid a pressure compensated motor or a motor with a
heavy duty shaft seal, your heading in the wrong direction.  Any water pump
you use is going to have shaft seal to keep the water in the pump housing
and out of the sub.  You could just use the same type of seal on a thruster
pod to keep the water out of it.  Use a carbon against ceramic spring loaded
face seal, like almost all water pumps use.

Dan H

----- Original Message -----
From: "Jon Wallace" <jonw@whoweb.com>
To: <personal_submersibles@psubs.org>
Sent: Saturday, April 08, 2006 12:35 AM
Subject: [PSUBS-MAILIST] motor thought


> psubbers,
>
> I had a thought today about motors for subs.  Would it be feasible to
> create
> a motor on the theory of a reaction turbine, using ambient water
> surrounding
> the sub.  My thought was this:
>
> 1) Mount a high pressure pump either inside or outside the sub.
>
> 2) The pump takes ambient water from it's environment and ducts it via
> hoses
> (or piping) to the turbine (squirrel cage, francis turbine, pelton wheel?)
>
> I suppose you could forego the turbine and just pump the water through a
> nozzle jet like Cousteau's saucer sub used.  Anyway, the attraction I saw
> was no need for pressure compensation except for the pump which would be
> pretty easy to do.
>
> Any thoughts?
>
> Jon
>
>
>
>
>
>
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