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Hi Brian,
there are flexible fuel tanks that have the
advantage in that they would be pressure resistant
& as your fuel level changes your buoyancy
wouldn't change; or not significantly.
You could possibly cover the motor with thin sheets
of polystyrene then fiberglass over it &
dissolve out the polystyrene leaving a small pocket
of air around it.
I'm sure if Frank were around he'd be on to this.
He wanted to put an outboard on Git Kraken.
Regards Alan
----- Original Message -----
Sent: Saturday, February 26, 2011 3:10
PM
Subject: Re: [PSUBS-MAILIST] pressure
compensated outboard
Hi Alan,
That was my first thought, if any components would be affected. I can't
see where there would be a problem, anything that has gasoline in it would be
safe as far as pressure is concerned. I'm thinking a 20 hp or so
outboard, electric start, fuel injected. I think most of those are water
cooled so that would be a plus. I would just turn the whole cylinder to
steer, and mount the thing in there good. Have a fuel line that could be
valved off, the fuel tank might have to be pressure resistant.
Brian
On Fri, Feb 25, 2011 at 5:58 PM, Alan James <alanjames@xtra.co.nz>
wrote:
An ambient outboard!
Sounds like an idea with a lot of potential
Brian.
I'm wondering if there are any components
that may be affected by the air pressure.
How big a motor are you envisaging?
What sort of motor controls?
Regards Alan
----- Original Message -----
Sent: Saturday, February 26, 2011
12:57 PM
Subject: [PSUBS-MAILIST] pressure
compensated outboard
I have an idea for a pressure compensated outboard engine so as to
give surface power for my sub. Basically it would be a "can"
that would cover an outboard engine with an opening on the bottom.
There would be a float valve located near the bottom of the
opening so when I submerge, as the water begins to move up into
the cylinder, compressing the air, the float valve would inject
air. That way it would keep a constant volume of air in the outboard
engine compartment. As you assend the extra air would simply expand
out the bottom.
Brian
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