[PSUBS-MAILIST] Habitat thoughts, was Taurus sub

Thu Sep 8 00:08:28 EDT 2016

Hi Alan,

One of the best ways to pressure test a small ambient habitat is to turn it upside down and fill it with water.  The pressure that the water exerts trying to explode the hull is exactly the  same as that of the buoyant force of air trying to explode the hull underwater.  You would not believe that number of laymen (and engineers) that I have to explain that to, most people think the water is trying to crush an ambient habitat.

That being said, 3/8 inch steel hull and 3/8 inch Plexiglas windows (don't even need to be round) will be sufficient.  The Scott Carpenter is the example of note.  Baylab and MarineLab are the typical cylindrical style and both were surplus steel tanks.

Something similar to Hank's Gamma, a 41 inch diameter by 8 foot long cylinder, would work for me.  And a motorized chassis added later would easily convert the habitat into an ambient submarine. I am thinking of a miniature JUL barge configuration for deployment stability ease.

Tim

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan via Personal_Submersibles
Sent: Wednesday, September 7, 2016 12:41 AM
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] Fw: Taurus sub

Tim, 

I like Hanks idea of finding a large cylinder with it's pressure resistant form.

You could possibly pick one up very cheaply.

Even though you are going ambient for the habitat, you can only equalise the 

pressure to one point in the water column.

So at 5ft high with a moon pool entrance, the top of the habitat would be at a 2.5 psi

internal pressure above ambient. Doesn't sound like much but if you multiply it out

it is 360 pounds per square ft. 

I am a fan of putting motors on these habitats, to make them easy to put in position

& relocate. I know this now sounds very much like a large ambient submarine, but

why not! With a little bit more effort, you could double as both.

Alan

Sent from my iPad

On 7/09/2016, at 4:12 pm, T Novak via Personal_Submersibles <personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> > wrote:

Hi Hank,

I want something reasonably transportable (light) so that I can deploy it most anywhere.

The BCIT habitat is designed as a 10ft long, 5ft wide, 5ft high box. This creates a 15,000 pound buoyant force resulting in a dry weight close to 20,000 pounds.  For me personally, low volume is the key to keeping it towable by my truck.  Under 10,000 pounds for sure, preferred somewhere around 6,000 pounds.  A cylinder 8ft long with 4ft dia might be okay.  At this point I am thinking about a habitat the size of a 3-man tent (but made of steel or fiberglass).  Ambient pressure internally means that not a lot of structure is required (inexpensive) and low volume means easy deployment. The other issue is where to worki on it.  I don't have sufficient shop space at this time, but hopefully soon.  My dream is not dead yet, just constantly postponed.

Tim

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of hank pronk via Personal_Submersibles
Sent: Tuesday, September 6, 2016 5:16 AM
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> >
Subject: Re: [PSUBS-MAILIST] Fw: Taurus sub

Hi Tim,

How big are you thinking for a habitat.  Where would you put it?  can you plunk it down anywhere you like?  Heck I have seen big tanks on skids that could be modified in a weekend.  Give me some idea of max and min size and I will keep an eye out for one.  Actually I have a tank on skids you can have for free.  I got it to build a bigger sub but can't seem to pull the trigger.  The tank is 21 feet long 5 feet dia  on a skid 11\16 shell and 7\8 heads.  

Hank

On Monday, September 5, 2016 11:03 AM, T Novak via Personal_Submersibles <personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> > wrote:

Sounds like she would be perfect as an ambient habitat.  Built by Hyco is good.  It is probably cheaper to have a habitat built in Vancouver than to have this bus shipped here.  Alan's right, the dream is probably a nightmare unless big dollars are happily available.

Tim

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of via Personal_Submersibles
Sent: Monday, September 5, 2016 8:20 AM
To: personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> 
Subject: Re: [PSUBS-MAILIST] Fw: Taurus sub

Locking out was a possibility but never the intent. Taurus was designed to carry heavy valve replacements and the like to and from seabed work stations, using a dry transfer system. She worked (occasionally) in the North Sea (<350 meters depth) and was built to compete with the PC-16s from Perry, which were actually never used in the North Sea, but were kept busy in the Med, instead. In any case, Taurus's dry transfer hatch is enormous to accommodate some specific kind of valve and or valve manifold--the dry transfer chamber could be equalized or pressurized as occasion demanded. And she has a BUNCH of compensated batteries, very much like a Pisces (only arranged low and along the sides, rather than in the middle). She is, as you might imagine, a bit of a bus. And roomy? Oh my, yes. 

Vance

-----Original Message-----
From: MerlinSub at t-online.de <mailto:MerlinSub at t-online.de>  via Personal_Submersibles <personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> >
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> >
Sent: Mon, Sep 5, 2016 10:47 am
Subject: Re: [PSUBS-MAILIST] Fw: Taurus sub

360 liter oxygen per person all 24 hours. Equal 1 - 2 USD. 

And Second hand scrubber material from you rebreather diver friends. 

Nearly nothing. 

-----Original-Nachricht-----

Betreff: Re: [PSUBS-MAILIST] Fw: Taurus sub

Datum: 2016-09-05T10:00:54+0200

Von: "Alan via Personal_Submersibles" <personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> >

An: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> >

It could be a nightmare Tim, & S.A. is a long way to go to check it out.

We do have a psub member in S.A.

It does have the diver lockout, but are you after a 1atm habitat or ambient?

What would the cost be in 02 & scrubbing per person per 24hrs?

Alan

Sent from my iPad

On 5/09/2016, at 5:55 pm, T Novak via Personal_Submersibles <personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> > wrote:

Alan,

You nailed it with the underwater habitat thought.  At 21fsw hatch pressure this vessel would require just a coat of new paint.  I should bid $10,000.  With shipping it might just work out.  Hmmm.

Tim

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan vio a Personal_Submersibles
Sent: Sunday, September 4, 2016 8:46 PM
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> >
Subject: Re: [PSUBS-MAILIST] Fw: Taurus sub

Tim,

I am not sure whether this is the same submarine, i.e. were there more than one Taurus

 built. It does mention That it was deployed in South Africa though. Certainly the one on

Ebay didn't look dive ready. 

Maybe a ready made underwater habitat! I am sure you could talk the price down.

Alan

Sent from my iPad

On 5/09/2016, at 3:17 pm, T Novak via Personal_Submersibles <personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> > wrote:

Good find, Alan.

Why does Silvercrest state that Taurus is "immediately available for worldwide underwater operations" if this boat is in the middle of an interrupted overhaul?  If Hank's used sub valuation guideline applies then this one is worth $120,000 in dive ready condition.  However, it's a very larger "personal sub" so perhaps the guideline does not apply.  Overhauling the systems and ABS recertification would likely cost than that amount again.  Serious money required.  Pretty cool, though.

Tim

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan James via Personal_Submersibles
Sent: Sunday, September 4, 2016 6:14 PM
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> >
Subject: Re: [PSUBS-MAILIST] Fw: Taurus sub

There are some specs on this Silvercrest site.

http://www.silvercrestsubmarines.co.uk/taurusinfo.html

Would hate to think what you may be in for, getting it up

to scratch. 8 view ports to replace?

Alan

  _____  

From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> >
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> > 
Sent: Monday, September 5, 2016 12:31 PM
Subject: [PSUBS-MAILIST] Fw: Taurus sub

Hello All,

Yesterday I came across the Taurus Submarine on eBay , she is 22 tons with diver lock out.   It is in South Africa, that is not bad if your in Europe, Carsten?

Hank

On Sunday, September 4, 2016 6:28 PM, xxx xxxxx <mp13 at live.ca <mailto:mp13 at live.ca> > wrote:

http://cgi.ebay.com/ebaymotors/Scientific-Taurus-Submarine-/122109506536?hash=item1c6e4b33e8:g:V60AAOSwvzRXxto- <http://cgi.ebay.com/ebaymotors/Scientific-Taurus-Submarine-/122109506536?hash=item1c6e4b33e8:g:V60AAOSwvzRXxto-&vxp=mtr> &vxp=mtr 
<image001.jpg>

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