Re: [PSUBS-MAILIST] Transit Outboards

["Gregory Cotton" <gregc02@gmail.com>]

Of course, if your outboard pod fails at depth you'll suddenly take on
at least a couple of hundred extra pounds of ballast and/or less
displacement. In any case you'll be a couple of hundred pounds heavy
and you'll need the equivalent in variable or main ballast tank
capacity to compensate.

Also, the pod would need to enclose the entire outboard and open up
for use so you could get the prop into the water.

If I was going to do such a thing I'd get a piece of depth rated steel
tube and put a hatch on either end and lower the outboard out the
bottom one for use.

It probably would be easier to just put a small gen set in a pressure
tight pod on deck and use that to charge batteries and provide power
for surface transit with the main electric motor.

That's why I find Kraka to be such an attractive boat, it's practical,
good looking and provides it's own power; I wish I had the money!

Of course my background is my first submarine love:

http://www.usstorsk.org/

I was on the last crew for her last 1 1/2 years. At least I can still
work on her now and then.

http://www.usstorsk.org/volunteers/423vlntr.htm



On 8/28/07, Brent Hartwig <brenthartwig@hotmail.com> wrote:
>
>  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.
>
>
>
>  ________________________________
>  Get a sneak peek of the all-new AOL.com.



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