[PSUBS-MAILIST] Ballast air

Thu Mar 12 05:32:27 EDT 2015

I am still not convinced. 
In the case of a flooded submarine the 
scrubber system wouldn't work unless you mounted the scrubber
very high in the sub. Also in the situation where you flood the sub
to escape, you need air on tap for the final pressure equalisation.
It is reasonably comforting to see a regulator next to you when
you are last person out.
Alan

Sent from my iPad

> On 12/03/2015, at 4:43 pm, Adam Lawrence via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan,
>  
> Yes, there is a very small amount of smoke in the volume of a 1-3 person submarine, compared to a building fire. Air filter respirators cartridges, combined with scrubbing and O2 replenishment accomplish the same thing as an SCBA, but without increasing cabin pressure.
>  ee
> Adam
> From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan James via Personal_Submersibles
> Sent: Wednesday, March 11, 2015 10:21 PM
> To: Personal Submersibles General Discussion
> Subject: Re: [PSUBS-MAILIST] Ballast air
> 
> OK I follow.
> So would the filter system filter out the smoke?
> I see firemen using compressed air, not filters.
> Flown over Houston but never visited.
> Alan
> 
> From: Adam Lawrence via Personal_Submersibles <personal_submersibles at psubs.org>
> To: 'Personal Submersibles General Discussion' <personal_submersibles at psubs.org> 
> Sent: Thursday, March 12, 2015 4:04 PM
> Subject: Re: [PSUBS-MAILIST] Ballast air
> 
> Allen,
>  
> No, not breathing pure O2, just enough to sustain you at the normal needed consumption rate, this O2 is mixed with filtered and scrubbed cabin air at the canister when you inhale.
>  
> A one tam sub, I am in Houston Texas.
>  
> Adam
> 
>  
> 
> 
> From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan James via Personal_Submersibles
> Sent: Wednesday, March 11, 2015 9:46 PM
> To: Personal Submersibles General Discussion
> Subject: Re: [PSUBS-MAILIST] Ballast air
> 
> So are you breathing pure O2 in an emergency situation?
> I guess the only time you would have a full face mask on
> is when there is smoke in the cabin from a fire.
> If you breathed pure O2 you would be adding more fuel to the
> flames.
> What sort of sub do you own Adam & what part of the World are you from?
> I'm down in N.Z.
> Alan
> 
> From: Adam Lawrence via Personal_Submersibles <personal_submersibles at psubs.org>
> To: 'Personal Submersibles General Discussion' <personal_submersibles at psubs.org> 
> Sent: Thursday, March 12, 2015 3:24 PM
> Subject: Re: [PSUBS-MAILIST] Ballast air
> 
> Hi Allen,
>  
> What I have is simpler than a full blown rebreather.
> The oxygen supply/flow enters the cabin at the scrubber canister. The canister has an air filter on it already (dust/smoke/hydrogen sulfide...). The emergency piece of equipment is a full face mask with a hose that connects to the scrubber assembly (fan off) on the inhale side, exhale goes back into the cabin.
>  
> The next simple version may be just a full face mask with dust/vapor cartridge, good enough to keep your eyes and lungs clean while making a quick ascent.
>  
> Those millionaires get all the toys.
>  
> Adam
> 
> 
> 
> From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan James via Personal_Submersibles
> Sent: Wednesday, March 11, 2015 5:27 PM
> To: Personal Submersibles General Discussion
> Subject: Re: [PSUBS-MAILIST] Ballast air
> 
> Hi Adam,
> that would require a rebreather style set up to do that.
> I believe they had a rebreather back up on James Camerons sub.
> A bit expensive & complicated.
> Alan
> 
> From: Adam Lawrence via Personal_Submersibles <personal_submersibles at psubs.org>
> To: 'Personal Submersibles General Discussion' <personal_submersibles at psubs.org> 
> Sent: Thursday, March 12, 2015 8:27 AM
> Subject: Re: [PSUBS-MAILIST] Ballast air
> 
> For emergencies, wouldn’t you use a full-face mask connected to a CO2
> scrubber and air filter and pure oxygen, all on the inhale side...
> 
> Compressed scuba air would increase cabin pressure and make things
> uncomfortable...
> 
> -----Original Message-----
> From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org]
> On Behalf Of hank pronk via Personal_Submersibles
> Sent: Wednesday, March 11, 2015 10:26 AM
> To: Personal Submersibles General Discussion
> Subject: Re: [PSUBS-MAILIST] Ballast air
> 
> 
> Brian,
> I don't mean oxygen, I mean  regular scuba air.  I have and am sure all
> other subs have scuba breathing apparatus for emergencies like smoke.  I
> take air from my ballast supply for that purpose.  If your ballast air is
> Nitrogen then you will need an extra tank for emergency breathing.  
> Hank --------------------------------------------
> On Wed, 3/11/15, Brian Cox via Personal_Submersibles
> <personal_submersibles at psubs.org> wrote:
> 
> Subject: Re: [PSUBS-MAILIST] Ballast air
> To: "Personal Submersibles General Discussion"
> <personal_submersibles at psubs.org>
> Received: Wednesday, March 11, 2015, 10:18 AM
> 
> Yes, my oxygen will be a separate
> tank, or tanks.
> 
> Brian
> 
> --- personal_submersibles at psubs.org
> wrote:
> 
> From: hank pronk via Personal_Submersibles
> <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion
> <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] Ballast air
> Date: Wed, 11 Mar 2015 05:37:11 -0700
> 
> Brian,
> You must be planning to have a separate tank for emergency  air for
> breathing, in case of fire etc.
> Hank
> --------------------------------------------
> On Wed, 3/11/15, Brian Cox via Personal_Submersibles
> <personal_submersibles at psubs.org>
> wrote:
> 
>   Subject: [PSUBS-MAILIST] Ballast air
>   To: "PSubs" <personal_submersibles at psubs.org>
>   Received: Wednesday, March 11, 2015, 2:50 AM
>   
>   I'm planning on having
>   3 - 300cu ft air cylinders for my ballast supply air.
>   I noticed that if I get them filled with nitrogen it is
>   cheaper than getting breathing or industrial air
>   !   That is, until I get my own
>   compressor. Brian
>   
>   -----Inline Attachment Follows-----
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