RE: [PSUBS-MAILIST] Transit Outboards

Early on in the development of subs when their size would have put them in the PSUB range and before diesels were available, it quickly became apparent that gasoline should not be carried within the hull. Fumes are easily generated and if they don’t explode, they are poisonous and can asphyxiate sub occupants. Fuel is always carried outside the hull. For these reasons, even after the advent of diesels.

R/Jay

Jay K. Jeffries

Andros Is., Bahamas

A skimmer afloat is but a submarine, so poorly built it will not plunge…

From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brent Hartwig
Sent: Tuesday, August 28, 2007 3:47 PM
To: personal_submersibles@psubs.org
Subject: [PSUBS-MAILIST] Transit Outboards

Great idear Frank,

I would expect that with some of the smaller outboards you could put them inside the sub, perhaps in a special built case, with out the need of a surface boat. You would want to make sure the gas didn't leak out.

I had thoughts along this line some time back, and was thinking about making a very small and light pressure hull to custom fit over the outboard rated at the same working pressure as the sub. The said small pressure hull could be made out of aluminum, steel, stainless steel, titanium, FRP or some other composite. It would be a great place to practice building and testing composite hull designs, since if it fails, you won't likely be harmed by it's implosion.

For this type of arrangement you will likely need manually operated valves for the exhaust and intake.

Regards,
Brent Hartwig

From: ShellyDalg@aol.com
Date: Mon, 27 Aug 2007 23:10:18 -0400
Subject: Re: [PSUBS-MAILIST] transit
To: personal_submersibles@psubs.org

Concerning surface transit.....What if you had an outboard motor on the back, and when your sub reached the dive site, transfer the (small) outboard to the support boat. A 20 horse motor should be easy to disconnect and pick up, transfer to a motor boat, and would likely power a small sub at a good speed, while not using any battery power. I assume you would have a surface boat as a safety precaution when you're diving the sub.

If the outboard mount was connected to the subs rudders, you could use the same steering mechanism to steer the outboard. Frank D.

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