[PSUBS-MAILIST] single seat sub
River Dolfi via Personal_Submersibles
personal_submersibles at psubs.org
Tue Nov 3 19:07:41 EST 2020
Roberto,
How deep is this wreck that you are interested in?
Did you want to salvage something from within it? Deep ocean salvage is
usually limited to retrieving small items from the bottom. Salvage from an
intact wreck involves either raising the entire intact wreck and moving it
into water shallow enough for divers to safely penetrate it (lookup the
salvage of the "Whine Maru") or demolishing the wreck, often with
explosives or surface operated hydraulic grabs, until it's cargo can be
removed. At the very least, your I would need a pair of hydraulic
manipulators and some subsea rotary saws.
You said something about nets on the wreck. Getting tangled in line or
fishing net is extremely hazardous, and has resulted in atleast one fatal
accident.
Have you dove in a submersible before? I would gain more experience with
submersibles before determining to build one. Where are you located? There
may be a Psubbers nearby who can assist.
I would not recommend making changes to the K250 drawings. The bottom
viewport is not hard to fabricate compared to the rest of the hull. Depth
perception through a downward viewport is also surprisingly important. I
can never realistically judge depth to the sea bottom through a downward
looking camera, but it is effortless through a window. If you want to look
at a TV screen, you should build an ROV.
I'm sorry if I read as overly harsh. If you begin this large of a project
with unrealistic expectations, you will spend a large amount of time and
money and walk away disappointed.
River J Dolfi
On Tue, Nov 3, 2020, 5:33 PM via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:
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> 1. Re: single seat sub (roberto alvarez via Personal_Submersibles)
> 2. Re: battery experiment (hank pronk via Personal_Submersibles)
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> Message: 1
> Date: Tue, 3 Nov 2020 13:34:48 -0800
> From: roberto alvarez via Personal_Submersibles
> <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion
> <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] single seat sub
> Message-ID:
> <CAJANxSPLhTJ=
> sr+hjUZGnPAQnaQO_9k_bC_Ca+GToFWorjKJNg at mail.gmail.com>
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> were i can find a dome?will follow the K250 ,may be just shorter and
> cameras instead the front viewport, best recomendation for the hemisphere?
>
> El mar., 3 de nov. de 2020 11:01 AM, hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org> escribi?:
>
> > If you are building a Deep Worker then a dome will restrict your
> > freeboard greatly. A cylinder is a better option for freeboard
> > Hank
> >
> > Sent from my iPhone
> >
> > > On Nov 3, 2020, at 11:04 AM, roberto alvarez via Personal_Submersibles
> <
> > personal_submersibles at psubs.org> wrote:
> > >
> > > ?
> > > Hi,i am members since 2003 aprox,read articles,and conversations, i
> > bought the K250 plans few years ago
> > > but never build, in 2010 a tour vessel sank in my area, nw us full of
> > fishing nets, was a 115 ft boat, and now i feel the need of build a
> > submersible vehicle, i try by the scuba side option, but to reach this
> > depth i need a technical diving course, gear and the limit will be the 50
> > meters for tec 1, and deco with oxigem, if i calculate the investment
> will
> > be around 3000 dlls in training for a 40 minutes immersion and 40 minutes
> > of deco( plus gas cost)
> > >
> > > My approach will be a version of the deep worker, single person small
> > vehicle, i quote the acrylic hemisphere in San Diego California, will be
> > the only piece that i will not be able to build locally
> > >
> > > for a 24 inch, 1 inch tick is recommended, i will use the hull calc to
> > verify the sections , the depth limit in the area is 80 meters, if some
> one
> > has any recommendation , please reply, thanks
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> Message: 2
> Date: Tue, 3 Nov 2020 22:32:21 +0000 (UTC)
> From: hank pronk via Personal_Submersibles
> <personal_submersibles at psubs.org>
> To: Alan James via Personal_Submersibles
> <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] battery experiment
> Message-ID: <1914359367.1357843.1604442741752 at mail.yahoo.com>
> Content-Type: text/plain; charset="utf-8"
>
> Alan, I just made a o-ring sealed cap for the battery and it works
> perfect. ?I was going to ask you about your cable potting material that you
> use in that little mould you made. ?That looks real pro!Hank
> On Tuesday, November 3, 2020, 1:20:00 PM MST, Alan James via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
> I think a key will be getting a good glue that bonds well to the casing
> to seal the terminals and go over the connection and cable as an initial
> layer. Alan
> On Wednesday, November 4, 2020, 09:15:35 AM GMT+13, hank pronk via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
> Alan , I have some ideas to make simple. Fingers crossedHank
>
> Sent from my iPhone
>
> On Nov 3, 2020, at 12:31 PM, Alan James via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>
>
> ? Hank,?some more thoughts; maybe find a barbed fitting with the same
> thread as the battery cap & with an o-ring. This would make it easy for
> anyone to emulate what you are doing.?Might be difficult checking the water
> level in the batteries with a layer of oil on top. Perhaps a probe that
> showed some current flow when it pushed down through the oil layer to the
> water layer; but this may get gunked up with oil on the way down.?Depending
> on how the top of the battery is molded, it may be difficult getting all
> the air out. I am pretty sure I had problems.?I am sure there was a section
> on compensating batteries in the Busby book & I think in the ex military
> document on compensating underwater enclosures that I have referenced
> before. (Am moving & books in another town) Cheers Alan
> On Wednesday, November 4, 2020, 08:11:54 AM GMT+13, Alan James via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
> Hank,?Maybe you could have all the hoses from the caps going in to one
> manifold that has an oil fill port. And one tube going out the top of the
> manifold for compensation. You would need an air gap in the top of the
> manifold so off gassing doesn't force the oil out. How deep is it going to
> go. While I'm thinking of it, I used baby oil that had some scented
> additive that caused the battery to off gas. Stopped when I went to pure
> mineral oil.?Alan
> On Wednesday, November 4, 2020, 07:58:53 AM GMT+13, hank pronk via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
> I am using wet cell?Hank
>
> Sent from my iPhone
>
> On Nov 3, 2020, at 11:29 AM, Alan James via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>
>
> ? I looked up golf cart batteries & they use both flooded & sealed.?I
> compensated the sealed AGM batteriesfor my ambient, but a bit more
> complicatedthan wet cel.?Alan
> On Wednesday, November 4, 2020, 06:38:50 AM GMT+13, hank pronk via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
> Alan. ?I am experimenting with golf cart batteriesHank
>
> Sent from my iPhone
>
> On Nov 3, 2020, at 10:18 AM, Alan James via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>
>
> ? Hank, it could work but it would be easier to make a box out of ply wood
> & oil fill it & just have 2 through hulls for the wires.?If you are having
> batteries in series you would be creating multiple points where the
> connecting wires would have to be sealed & could fail.?Are they sealed lead
> acid batteries??Alan
>
> On Wednesday, November 4, 2020, 02:10:34 AM GMT+13, hank pronk via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
> Okay, your gonna think I am nuts ?but I am doing an experiment with lead
> acid batteries. ?I am going to make a new cap that accepts a barbed hose
> fitting and water tight post enclosures , so I can fill the battery with
> oil and submerge it without an enclosure (battery pod)The hoses will be
> coiled and open to the sea. ?Do you think it will
> work?Hank_______________________________________________
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