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Re: [PSUBS-MAILIST] sub plans
Gday Carsten.
I have built keel cooling into a fishing boat that I once owned but of
coarse the integrity of the hull under pressure was not in question.
I was thinking also that even with the addatives available today even
freshwater in the engine block causes corrosion although to a lesser extent.
I am probably being too cautious about cutting holes in the pressure hull,
thanks for the advise, regards,
Clive.
----- Original Message -----
From: <MerlinSub@t-online.de>
To: <personal_submersibles@psubs.org>
Sent: Wednesday, February 27, 2008 2:18 AM
Subject: RE: [PSUBS-MAILIST] sub plans
Long pressure tight freswater pipe goes out the boat all along the boats
keel
and back and later back inside the boat.
No special exchanger. No seawater inside the boat. Called "keelcooling.
Simple single loop. Two security valves inside. In bypass the heat exhanger
for hotwater for shower and kitchen. Another bypass for the gear-oil cooler.
Air cooled motor can maybe create a heat problem
inside the sub. But depents of size of motor and time of air exchange.
Many boats from the World WarI and before period have problems with to much
heat inside.
With an aircoled motor, aircooled gear and 1-2 aircooled compressors and all
running
you need a big sailhatch..
regards Carsten
"Brent Hartwig" <brenthartwig@hotmail.com> schrieb:
Isn't there a water heat exchanger, that you can pump sea water through
and then through another set of pipes you circulate the motor cooling
fluid. Thus keeping salt water out of the engine block? Or is a keel
cooling unit a better and simpler option?
Regards,Brent Hartwig> From: pirate@arach.net.au> To:
personal_submersibles@psubs.org> Subject: Re: [PSUBS-MAILIST] sub plans>
Date: Tue, 26 Feb 2008 12:39:06 +0900> > Gday Carsten.> The thoughts I
came up with regarding the use of an air cooled engine > are,keeping to a
minimum the piping through the pressure hull and therefore > eliminating a
number of shut off valves, and with internal air ducting to > the conning
tower this provides a very effective means of changing the total > volume
of air in the sub,> An alternative to this would be to locate the engine
in an external pressure > pod that could be kept automatically at the
pressure the sub is operating > at.> This would eliminate heat within the
interior of the sub and create a lot > more living space.It goes without
saying that an aircooled engine is much > lighter than water cooled, does
not have the problem of heat exchangers for > fresh/saltwater cooling and
reduces corrosion of the block.> As I said before at this stage these are
just thoughts and the more feedback > I get the more I learn,and if you
have any ideas I would be grateful.> Thanks again> Clive> ----- Original
Message ----- > From: <MerlinSub@t-online.de>> To:
<personal_submersibles@psubs.org>> Sent: Tuesday, February 26, 2008 5:51
AM> Subject: Re: [PSUBS-MAILIST] sub plans> > > Air cooled diesel? why?> >
regards Carsten> > > "Clive Wood" <pirate@arach.net.au> schrieb:> > Gday
again Ian.> > At the moment I am just in the thinking phase prior to
design phase, these> > are my thoughts to date.> > Built as a yacht that
can be lived on for periods up to about one month > > with> > 6 persons on
the surface.> > An endurance of 24 hours underwater for 6 persons with
emergency air and> > power for 5 days.> > Air cooled diesel (surface) and
4 x 72 volt electric motors (submerged).> > 40 inch acrylic hemispherical
viewport in the bow for pilot and 4 x 10 > > inch> > viewports for
observers and C S television astern and above.> > A manipulator arm at the
lower bow operated electrically rather than> > hydraulically.> > I have no
ideas as yet as to the type of batteries that would be most> > suitable,
external saltwater batteries would be interesting but would not> > deliver
anything like the power needed for the main drive etc but may be> > useful
for emergencies and lights etc ( very low power but long life ).> > Able
to fill air tanks while travelling on the surface and with a depth> >
capability of 600 feet.> > These are just basic ideas at this stage and
the reality may be quiet> > different subject to cost etc but it would cut
out the cost of a support> > ship.> > A friend of mine who builds ROV's as
a hobby and myself have an interest > > in> > marine salvage and this is
the purpose the sub will be used for.> > Well I will leave it at that for
now and see what ideas I get back.> > Cheers Clive.> >> >> >
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