Input on Sling rebreather design.

whoizrob · 29th September 2007, 21:12

I'd read a while ago (perhaps one of Mr. Suttons musings?) that the chemical reaction could be jump started with a shot of CO2, say from a CO2 powerlet. Will this work or just over power the scrubber bed I don't know. Just a thought....

Rob

Outlaw · 29th September 2007, 23:37

Quote: (Originally Posted by whoizrob)

I'd read a while ago (perhaps one of Mr. Suttons musings?) that the chemical reaction could be jump started with a shot of CO2, say from a CO2 powerlet. Will this work or just over power the scrubber bed I don't know. Just a thought....

Rob

i would like to know a bit more on the issue, but it seems that there is some sort of hijack here. maybe is someone splits the thread, then i would want to hear it from the very experts on this. you can see that there is a variety of opinions on the matter...

Thanks

Spyros

jaap · 29th September 2007, 23:53

Quote: (Originally Posted by whoizrob)

I'd read a while ago (perhaps one of Mr. Suttons musings?) that the chemical reaction could be jump started with a shot of CO2, say from a CO2 powerlet. Will this work or just over power the scrubber bed I don't know. Just a thought....

Rob

That sounds very very dangerous. Sure the scrubber will probably jumpstart. A friend of mine and I blew some 100% CO2 over a small beaker full of sorb some years ago. As predicted the thing got very very hot fast. Far hotter than normal scrubber temps.

Its not something new. Some russian and other chemical Rebreather's sometimes use an chemical initiator that produces a pulse of CO2 to get the scrubber/O2 generator going (like in some KO2 based systems).

But I would never consider this for a homebuild (at least not seriously, perhaps for the fun of it). How do you know when its safe to breath from such a thing? How much scrubber life was consumed by the extra CO2? How does the absorbtion profile look? Did it increase the risk for early breakthrough?

**wedivebc** · 30th September 2007, 01:02

Quote: (Originally Posted by jaap)

That sounds very very dangerous. Sure the scrubber will probably jumpstart. A friend of mine and I blew some 100% CO2 over a small beaker full of sorb some years ago. As predicted the thing got very very hot fast. Far hotter than normal scrubber temps.

Its not something new. Some russian and other chemical Rebreather's sometimes use an chemical initiator that produces a pulse of CO2 to get the scrubber/O2 generator going (like in some KO2 based systems).

But I would never consider this for a homebuild (at least not seriously, perhaps for the fun of it). How do you know when its safe to breath from such a thing? How much scrubber life was consumed by the extra CO2? How does the absorbtion profile look? Did it increase the risk for early breakthrough?

Actually KO2 oxygen rebreathers use chlorate candle to initiate the reaction which produces O2 not CO2.
Chemical oxygen generator - Wikipedia, the free encyclopedia

jaap · 30th September 2007, 17:58

Quote: (Originally Posted by wedivebc)

Actually KO2 oxygen rebreathers use chlorate candle to initiate the reaction which produces O2 not CO2.
Chemical oxygen generator - Wikipedia, the free encyclopedia

Yes, sometimes. But...there are also other systems that actually make CO2 to get things going. Have had a russian manual describing such a system translated for me. If I recall correctly the CO2 generators was pretty straight forward. A striking pin breaking a container of acid that flows into some carbonate salt giving off CO2 very fast.

johnv · 30th September 2007, 19:36

Quote: (Originally Posted by whoizrob)

I'd read a while ago (perhaps one of Mr. Suttons musings?) that the chemical reaction could be jump started with a shot of CO2, say from a CO2 powerlet. Will this work or just over power the scrubber bed I don't know. Just a thought....

Rob

You want to get rid of Co2, not add it to the loop. Just go semi closed for a while.

John

29th September 2007, 21:12	#11 (permalink)
whoizrob New Member Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Apr 2006 Location: Sacramento Posts: 72	Dirty rumor... I'd read a while ago (perhaps one of Mr. Suttons musings?) that the chemical reaction could be jump started with a shot of CO2, say from a CO2 powerlet. Will this work or just over power the scrubber bed I don't know. Just a thought.... Rob
(Offline)

29th September 2007, 23:37	#12 (permalink)
Outlaw In search of Law breaking Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Aug 2006 Location: Cyprus, Nicosia Posts: 634	Re: Dirty rumor... Quote: (Originally Posted by whoizrob) I'd read a while ago (perhaps one of Mr. Suttons musings?) that the chemical reaction could be jump started with a shot of CO2, say from a CO2 powerlet. Will this work or just over power the scrubber bed I don't know. Just a thought.... Rob i would like to know a bit more on the issue, but it seems that there is some sort of hijack here. maybe is someone splits the thread, then i would want to hear it from the very experts on this. you can see that there is a variety of opinions on the matter... Thanks Spyros __________________ CMAS - IANTD - TDI Kamikazi Instrustor Trainer DIRRebreather Team Member ---------------------------- "Once an Outlaw, always an Outlaw"
(Offline)

29th September 2007, 23:53	#13 (permalink)
jaap Normal people worry me Current Rebreather/s: Classic Kiss Other CCR RB80 / Clone Ray Other SCR Home Build Other Rebreather/s: Other CCR RB80 / Clone Ray Other SCR Home Build Join Date: Jun 2005 Location: Stockholm Sweden Posts: 451	Re: Dirty rumor... Quote: (Originally Posted by whoizrob) I'd read a while ago (perhaps one of Mr. Suttons musings?) that the chemical reaction could be jump started with a shot of CO2, say from a CO2 powerlet. Will this work or just over power the scrubber bed I don't know. Just a thought.... Rob That sounds very very dangerous. Sure the scrubber will probably jumpstart. A friend of mine and I blew some 100% CO2 over a small beaker full of sorb some years ago. As predicted the thing got very very hot fast. Far hotter than normal scrubber temps. Its not something new. Some russian and other chemical Rebreather's sometimes use an chemical initiator that produces a pulse of CO2 to get the scrubber/O2 generator going (like in some KO2 based systems). But I would never consider this for a homebuild (at least not seriously, perhaps for the fun of it). How do you know when its safe to breath from such a thing? How much scrubber life was consumed by the extra CO2? How does the absorbtion profile look? Did it increase the risk for early breakthrough? __________________ My initials: JAAP
(Offline)

30th September 2007, 01:02	#14 (permalink)
wedivebc Dave Tomblin Current Rebreather/s: Megalodon Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Sport Kiss Other CCR Join Date: Feb 2005 Location: Vancouver Island BC Canada Posts: 1,444	Re: Dirty rumor... Quote: (Originally Posted by jaap) That sounds very very dangerous. Sure the scrubber will probably jumpstart. A friend of mine and I blew some 100% CO2 over a small beaker full of sorb some years ago. As predicted the thing got very very hot fast. Far hotter than normal scrubber temps. Its not something new. Some russian and other chemical Rebreather's sometimes use an chemical initiator that produces a pulse of CO2 to get the scrubber/O2 generator going (like in some KO2 based systems). But I would never consider this for a homebuild (at least not seriously, perhaps for the fun of it). How do you know when its safe to breath from such a thing? How much scrubber life was consumed by the extra CO2? How does the absorbtion profile look? Did it increase the risk for early breakthrough? Actually KO2 oxygen rebreathers use chlorate candle to initiate the reaction which produces O2 not CO2. Chemical oxygen generator - Wikipedia, the free encyclopedia __________________ Cheers, Dave.... Man is the only animal burdened with the knowledge he will eventually die
(Online)

30th September 2007, 17:58	#15 (permalink)
jaap Normal people worry me Current Rebreather/s: Classic Kiss Other CCR RB80 / Clone Ray Other SCR Home Build Other Rebreather/s: Other CCR RB80 / Clone Ray Other SCR Home Build Join Date: Jun 2005 Location: Stockholm Sweden Posts: 451	Re: Dirty rumor... Quote: (Originally Posted by wedivebc) Actually KO2 oxygen rebreathers use chlorate candle to initiate the reaction which produces O2 not CO2. Chemical oxygen generator - Wikipedia, the free encyclopedia Yes, sometimes. But...there are also other systems that actually make CO2 to get things going. Have had a russian manual describing such a system translated for me. If I recall correctly the CO2 generators was pretty straight forward. A striking pin breaking a container of acid that flows into some carbonate salt giving off CO2 very fast. __________________ My initials: JAAP
(Offline)

30th September 2007, 19:36	#16 (permalink)
johnv Custom Title Allowed! Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Dec 2005 Location: UK Posts: 142	Re: Dirty rumor... Quote: (Originally Posted by whoizrob) I'd read a while ago (perhaps one of Mr. Suttons musings?) that the chemical reaction could be jump started with a shot of CO2, say from a CO2 powerlet. Will this work or just over power the scrubber bed I don't know. Just a thought.... Rob You want to get rid of Co2, not add it to the loop. Just go semi closed for a while. John
(Offline)

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