Rebreather testing on Everest complete

shutupanddive · 29th May 2007, 14:20

Some pretty exciting data has been compiled over the last few weeks using rebreathers on Everest. O2 saturation levels exceeded even the best hopes!For those of you that are interested in climbing or are just curious about CCR use for less than 1 ATA check out the link below.
Caudwell Xtreme Everest
We were able to overcome many of the obstacles that have prevented rebreathers from a successful summit in the past--one of the biggest advantages to our system is the ability for the ExtendAir scrubber to work at -30C instantly, without a pre-breath, as well as the fact that the cartridges can be frozen solid for weeks, loaded and used (try that with granules) I of course may be a bit biased

On another interesting note--our Expedition members saved the life of a women left for dead by her own team--check out this link for the story

http://news.bbc.co.uk/2/hi/south_asia/6697577.stm

Very best regards, Jeff

gtzavelas · 29th May 2007, 14:51

Extremely interesting , congratulations
Could you share some more info as the web site has very little info on the rebreather itself (all I could find was: http://www.xtreme-everest.co.uk/news_detail.php?article=197 )

I guess everybody here is very interested – especially about the
“the ExtendAir scrubber to work at -30C instantly, without a pre-breath” part

***Decodiver*** · 29th May 2007, 15:11

Congratulations to your team for saving the life of the young woman.

Honorable actions in an unforgiving environment.

shutupanddive · 29th May 2007, 15:35

Quote: (Originally Posted by gtzavelas)

Extremely interesting , congratulations
Could you share some more info as the web site has very little info on the rebreather itself (all I could find was: http://www.xtreme-everest.co.uk/news_detail.php?article=197 )

I guess everybody here is very interested – especially about the
“the ExtendAir scrubber to work at -30C instantly, without a pre-breath” part

In the environmental chamber tests we froze solid the CCRs-- one with our 5 inch cartridge and one with the same amount of Sofnolime (at -30C) after 24 hours of freezing we started breathing on the loop instantly at 20bpm and 40RMV (tidal volume 2l). On average the Sofnolime reached .5 CO2 in 15 minutes and the cartridge reached .5 at 245 minutes.
The fact that the cartridges can be pre-loaded without dusting and loosness created from the vibration, that your average oxen and sherpa can generate, made it an even more obvious choice--try pouring some granules into a canister at minus 25C with 50 mile an hour wind. Of course you don't have to spank the canister...you just shiver!

Tautaz · 29th May 2007, 15:41

Some words from rescue teams around the world:

"Who save a life, save the world"

Congratulation for your test and your "humanity"

David

cameron · 29th May 2007, 15:48

Amazing article

as an aside,
I find it ammusing that those of us that live at sealevel most of their lives require all this gear and technology to do a sumit on everest, when on the other hand a shirpa who is accustomed to living at altitude can do that summit in one day.

hmmmm... maybe if I slept in my bathtub I would have a better SAC....

**UWSojourner** · 29th May 2007, 18:14

Quote: (Originally Posted by shutupanddive)

try pouring some granules into a canister with a 50 mile an hour wind ...

Well, it would get rid of the dust

.

Great story. Congratulations on saving the stranded climber.

29th May 2007, 14:51	#2 (permalink)
gtzavelas Rebreather World Writer Current Rebreather/s: Megalodon RB80 / Clone Other Rebreather/s: RB80 / Clone Join Date: Jan 2006 Location: Athens,Greece Posts: 224	Re: Rebreather testing on Everest complete Extremely interesting , congratulations Could you share some more info as the web site has very little info on the rebreather itself (all I could find was: http://www.xtreme-everest.co.uk/news_detail.php?article=197 ) I guess everybody here is very interested – especially about the “the ExtendAir scrubber to work at -30C instantly, without a pre-breath” part
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29th May 2007, 15:11	#3 (permalink)
*Decodiver* Administrator Current Rebreather/s: Megalodon Ouroboros rEvo Other CCR Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Sport Kiss Classic Kiss rEvo Other CCR Join Date: Jan 2005 Location: Geneva Posts: 2,164	Re: Rebreather testing on Everest complete Congratulations to your team for saving the life of the young woman. Honorable actions in an unforgiving environment. __________________ CCR/OC Trimix Instructor Trainer CCR Training to Mixed Gas in Switzerland, France, UK & Germany on Megalodon/COPIS-Megalodon/KISS/Sport KISS/Ouroboros/rEvo/Inspiration/Evolution/Sentinel www.zerogravitydiving.com Rebreather World Terms & Conditions
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29th May 2007, 15:35	#4 (permalink)
shutupanddive New Member Current Rebreather/s: Inspiration Classic Inspiration Vision Evolution Megalodon Sport Kiss Optima Titan Other CCR Dolphin Ray Azimuth Other SCR Other Rebreather/s: Other CCR Dolphin Ray Azimuth Other SCR Join Date: Mar 2007 Location: florida Posts: 3	Re: Rebreather testing on Everest complete Quote: (Originally Posted by gtzavelas) Extremely interesting , congratulations Could you share some more info as the web site has very little info on the rebreather itself (all I could find was: http://www.xtreme-everest.co.uk/news_detail.php?article=197 ) I guess everybody here is very interested – especially about the “the ExtendAir scrubber to work at -30C instantly, without a pre-breath” part In the environmental chamber tests we froze solid the CCRs-- one with our 5 inch cartridge and one with the same amount of Sofnolime (at -30C) after 24 hours of freezing we started breathing on the loop instantly at 20bpm and 40RMV (tidal volume 2l). On average the Sofnolime reached .5 CO2 in 15 minutes and the cartridge reached .5 at 245 minutes. The fact that the cartridges can be pre-loaded without dusting and loosness created from the vibration, that your average oxen and sherpa can generate, made it an even more obvious choice--try pouring some granules into a canister at minus 25C with 50 mile an hour wind. Of course you don't have to spank the canister...you just shiver!
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29th May 2007, 15:41	#5 (permalink)
Tautaz New Member Current Rebreather/s: Home Build Other Rebreather/s: Not Bought Yet Home Build Join Date: Jan 2007 Location: Colomiers France Posts: 60	Re: Rebreather testing on Everest complete Some words from rescue teams around the world: "Who save a life, save the world" Congratulation for your test and your "humanity" David
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29th May 2007, 15:48	#6 (permalink)
cameron Classic Kiss 124 Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Apr 2005 Location: Toronto, Ontario, Canada Posts: 241	Re: Rebreather testing on Everest complete Amazing article as an aside, I find it ammusing that those of us that live at sealevel most of their lives require all this gear and technology to do a sumit on everest, when on the other hand a shirpa who is accustomed to living at altitude can do that summit in one day. hmmmm... maybe if I slept in my bathtub I would have a better SAC.... __________________ Reclaim at work and CCR at home, life is good
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29th May 2007, 18:14	#7 (permalink)
UWSojourner Pacific Northwest Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Feb 2005 Location: Portland Oregon Posts: 556	Re: Rebreather testing on Everest complete Quote: (Originally Posted by shutupanddive) try pouring some granules into a canister with a 50 mile an hour wind ... Well, it would get rid of the dust . Great story. Congratulations on saving the stranded climber.
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