Using SFOGs (O2 candles) in Vacc suits not compressed air

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sideranautae
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Using SFOGs (O2 candles) in Vacc suits not compressed air

Postby sideranautae » Wed Apr 30, 2014 2:23 pm

Some Russian space suits use these instead of a compressed O2 tank for their suits. Might be a nice little detail to add "flavor".




SFOG = Solid Fuel Oxygen Generator
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Wil Mireu
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Re: Using SFOGs (O2 candles) in Vacc suits not compressed ai

Postby Wil Mireu » Wed Apr 30, 2014 3:52 pm

sideranautae
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Re: Using SFOGs (O2 candles) in Vacc suits not compressed ai

Postby sideranautae » Wed Apr 30, 2014 4:02 pm

Wil Mireu wrote:Bit risky though...
http://en.wikipedia.org/wiki/Vika_oxygen_generator
Those models, yes indeed. The ones used on our subs are MUCH better designed and safer. But even ours must be monitored on a continuous basis. But, a couple TL's higher. It's an idea...
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Re: Using SFOGs (O2 candles) in Vacc suits not compressed ai

Postby Rikki Tikki Traveller » Wed Apr 30, 2014 4:57 pm

Ever flown on a an Airplane? The oxygen mask that they show you coming down from the unit over your head gets it's oxygen from a solid Oxygen Generator. How unsafe are they?
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sideranautae
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Re: Using SFOGs (O2 candles) in Vacc suits not compressed ai

Postby sideranautae » Wed Apr 30, 2014 6:49 pm

Rikki Tikki Traveller wrote:Ever flown on a an Airplane? The oxygen mask that they show you coming down from the unit over your head gets it's oxygen from a solid Oxygen Generator. How unsafe are they?
I had completely forgotten about those. Thanks for pointing this out Rikki.
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Re: Using SFOGs (O2 candles) in Vacc suits not compressed ai

Postby Infojunky » Thu May 01, 2014 6:33 am

May I point out the they were extensively used in the USN as the O2 generator in OBAs (Oxygen Breathing Apparatus) which every damn Squid and not a inconsequential number of Jarheads where trained to use as sop for Shipboard Fire Fighting....
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Re: Using SFOGs (O2 candles) in Vacc suits not compressed ai

Postby locarno24 » Thu May 01, 2014 10:35 am

Definitely. CO2 scrubbers and oxygen generators can be purely chemical, which means they can essentially be held in the 'weave' of a heavy-duty vacc suit. Such a thing is technically simpler and more damage-tolerant than any 'tank-strapped-to-the-back' approach, which will be key for any universe where jeff bloggs can get a medium passage for the price of an expensive contemporary holiday and five guys de-mobbed from government service with little or no fleet experience can buy a starship....

Also, you can hold more gas per unit volume with compounds containing that gas than with the 'pure' gas itself. Wierd, I know, but that's how chemistry works - volume is largely dependent on the number of molecules, not how complex said molecules are. This is why, if all you wanted was hydrogen, it would be more space efficient to carry liquid ammonia (NH4) than liquid hydrogen (H2).
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Re: Using SFOGs (O2 candles) in Vacc suits not compressed ai

Postby sideranautae » Thu May 01, 2014 2:09 pm

Great info! Also, like you mention locarno24, NH4 (and H2O) are more Hydrogen dense than LHyd itself. I use for storage in my game. But, has to be processes before used in a jump bubble. So, used for PP fuel & maybe a 2nd jump worth of H2 sitting in a collapsible bladder. Room temp rather than cryo.
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Re: Using SFOGs (O2 candles) in Vacc suits not compressed ai

Postby Condottiere » Thu May 01, 2014 3:43 pm

I read somewhere that it's possible to store hydrogen in a more denser configuration.
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Re: Using SFOGs (O2 candles) in Vacc suits not compressed ai

Postby sideranautae » Thu May 01, 2014 3:47 pm

Condottiere wrote:I read somewhere that it's possible to store hydrogen in a more denser configuration.
http://www.natureworldnews.com/articles ... ssures.htm

But, too much trouble. Ammonia or water is much better.
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Re: Using SFOGs (O2 candles) in Vacc suits not compressed ai

Postby Jacqual » Thu May 01, 2014 10:39 pm

At a high TL it would be safer then a tank of the stuff by itself, it would last longer. At TL 12+ I am pretty sure it could very well be the norm for suits and even starship life support.
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Re: Using SFOGs (O2 candles) in Vacc suits not compressed ai

Postby Lord High Munchkin » Thu May 01, 2014 10:53 pm

So, what would TL12+ candles weigh and cost (if they aren't already in the rules... I am away from my books)?
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Re: Using SFOGs (O2 candles) in Vacc suits not compressed ai

Postby sideranautae » Thu May 01, 2014 11:05 pm

Lord High Munchkin wrote:So, what would TL12+ candles weigh and cost (if they aren't already in the rules... I am away from my books)?
They have never been in the Trav rules. 1 liter sized would be a couple of kilo's. Probably cost Cr20. Last for 8-12 hours for a person. TL 12+ would be cheaper and last longer probably.
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Re: Using SFOGs (O2 candles) in Vacc suits not compressed ai

Postby Condottiere » Fri May 02, 2014 8:33 pm

I vote for skintight elastic suits and brass brassieres. Do we wear codpieces?
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Re: Using SFOGs (O2 candles) in Vacc suits not compressed ai

Postby sideranautae » Fri May 02, 2014 8:35 pm

Condottiere wrote:Do we wear codpieces?
Hopefully NOT if you are also wearing brass brassieres. :lol:
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Re: Using SFOGs (O2 candles) in Vacc suits not compressed ai

Postby Infojunky » Fri May 02, 2014 8:57 pm

sideranautae wrote:
Condottiere wrote:Do we wear codpieces?
Hopefully NOT if you are also wearing brass brassieres. :lol:
BOTH! it confuses them....
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