Re: [PSUBS-MAILIST] Life support

[MerlinSub@t-online.de (Carsten Standfuß)]

Matt - have you looked to the F&A Page at Psubs ?. 
Look at "Livesupport" and "Divetime" there. 
Also there must be a lot answers in the archive, 
Look for "Live Support" or "L.S.S" or "Oxygen" or 
"Co2" etc. 

In general you need a pure oxygen bottle and a CO2 scrubber system
in a dry sub. Theoretical you can also use compressed air and 
an cabin constant 1atm overflow system. But this needs a compressor to 
keep the overflow air outside the sub - or to compress it to bottles 
- and is very unuseual. I have never seen a airbottle overflow live 
support system in a submarine. Why carring a gas in bootles like air 
if 79 % of them can not be use for breathing ? Why keep gas overboard
which contains at least 17 % oxygen - and is still useful for breathing
?  

The simplest way for a L.S.S. is to use an Dive rebreather - a simple 
small pure oxygen rebreather like they used to escape in Uboats during 
world war II its all you need - if you like the mouth-piece. If not 
you can rebuild the system with a electic fan to a open system 
witch enclose the cabin. The CCR (Close cycle rebreather) page 
on the internet are helpful also to understand the L.S.Systems.  

regards Carsten

> Matt Cadieux schrieb:
> 
> Can any do me a favor and possibly describe there subs life support
> system.  What is better an air supply or a pure oxygen supply with C02
> scrubbers.  How are you maintaining the 1atm of pressure?  I am not
> looking for a long or deep diving setup. I'm looking to use a MAX of 4
> SCUBA tanks to support 2 people.  Dive depth would be less than 50
> feet.  Any help would be greatly appreciated or if anyone has a
> specific thing I can research that would also be very helpful.
> 
> 
> 
> 
>             Matt Cadieux