Tried the Pelagian....

**Gill Envy** · 19th May 2008, 19:01

thanks Andy, always a helpful response!

Truth be told, that is pretty much what I've come to on my own: start with a lower set point for rapid descents (mostly tropical), turn down the IP for slow descents (mostly local cold water).

Your needle valve concept could just turn out to be the next revolution in mCCR diving. I can see a variety of ways it will likely out perform an MFO. it's an impressive concept and it's great to hear more feedback from folks out in the field on how easy it is to use.

Has their been anyone using it with dry gloves in cold water?

kind regards,
george

Quote: (Originally Posted by Rebreatherlab)

Hi Gill,

Just start with a lower Po2 and you will not have any spiking. I typically start with pure O2, go to 20 ft, check cell liniarity, flush down to 0,6 or so and then just bomb down. Usually this puts me at 1,2 when reaching 160 ft. As we are talking fast descents you really dont have to worry about the short exposure below set point.

If I do a deeper dive with a slow descent and feel it would be nice to stay closer to set point during the descent I simply close the needle and metabolise some of the O2 on the way. depending on gas selection, depth and descent time this can actually work quite good.

Andy

rogeringebo · 21st May 2008, 08:28

Quote: (Originally Posted by PnL)

Roger - were you able to sling multiple bottles on one side without it affecting the inhale counterlung? I typically sling all my bottles on the left ... its a vestige left over from my OC tech days and one that I feel comfortable with.

Thanks,
Paul

Hi Paul!
I like to sling my stuff on 2 sides but either way works just fine.
I have dived with 3 alu 80s on the left side and 2 on the right with out any effects on the breathing capacity on my my CLs.
If I would decide on wearing it all on one side I would sling 2 tanks and put the rest on a leach trailing from my hip d-ring Gue style...works just fine...

When it comes to testing the scrubber capacity there has been no testing in a lab or simular.
Personally I go more on how much sorb can fit and the work of breathing that will determine your co2 production among other things.
As the Pelagian breaths very well, is super small and compact for low co2 production and have one of the biggest scrubbers on the market I build my trust on that. Apart from all the diving I have done on it of course....
Dont care to much for CE testing and simular personally but I guess Im more of a practical kind of guy

. What works works sort of....
What can put you in trouble in a CCR dive I belive is not going to have anything to do with a stamp on your weapon of choice when it comes to diving.

Dive safe!

Cheers
Rogee

PnL · 23rd May 2008, 16:15

Good to hear that slinging multiple bottles doesn't cause a problem.

Here is one more question. Since the D-rings on the shoulder straps are underneath the counterlungs, where do you clip things off (like backup lights, etc) while diving? Or is it easy enough to get to the D-rings - this is something that I did not try when diving the Pelagian.

Thanks,
Paul

rogeringebo · 24th May 2008, 00:23

Hi!
It very easy reaching your d rings... I use standard model but found a slightly bigger version I like. There is a version that stands out sideways that some Meg and Inspo divers use. I tried those but did not like them as they kept interfering with arm movement at the biceps. I think you can get them from Golem gear or Narked at 90?
You can not put back up light on the webbing as it would be in the way of the CL velcro. I just keep one in each thigh pocket. Works just fine.

Cheers
Roger

**fireman** · 24th May 2008, 16:43

My rebreather has a simple fool proof way of adapting the O2 flow to changing metabolic needs also--manual add...

PnL · 24th May 2008, 17:00

Quote: (Originally Posted by fireman)

My rebreather has a simple fool proof way of adapting the O2 flow to changing metabolic needs also--manual add...

And how is that different from the Pelagian?

I know what you are getting at, but the needle valve does more than just set O2 delivery rates, it also eliminates a blocked first stage so there are no depth limitations. All mCCR's that use a CMF require a blocked first stage and, therefore, has an inherent depth limitation dependent on the IP of that first stage.

That is the largest difference to me, although being able to adjust the flow rate is pretty slick. I found it easy to set and its nice not to constantly hit the O2 add button.

19th May 2008, 19:01	#21 (permalink)
Gill Envy Shearwater Copis Divers Current Rebreather/s: Other CCR Other Rebreather/s: Evolution Other CCR Join Date: Nov 2005 Location: seattle Posts: 1,314	Re: Tried the Pelagian.... thanks Andy, always a helpful response! Truth be told, that is pretty much what I've come to on my own: start with a lower set point for rapid descents (mostly tropical), turn down the IP for slow descents (mostly local cold water). Your needle valve concept could just turn out to be the next revolution in mCCR diving. I can see a variety of ways it will likely out perform an MFO. it's an impressive concept and it's great to hear more feedback from folks out in the field on how easy it is to use. Has their been anyone using it with dry gloves in cold water? kind regards, george Quote: (Originally Posted by Rebreatherlab) Hi Gill, Just start with a lower Po2 and you will not have any spiking. I typically start with pure O2, go to 20 ft, check cell liniarity, flush down to 0,6 or so and then just bomb down. Usually this puts me at 1,2 when reaching 160 ft. As we are talking fast descents you really dont have to worry about the short exposure below set point. If I do a deeper dive with a slow descent and feel it would be nice to stay closer to set point during the descent I simply close the needle and metabolise some of the O2 on the way. depending on gas selection, depth and descent time this can actually work quite good. Andy __________________ Gill Envy ...Because I wasn't born with gills! ><(°>><(°>><(°>><(°>><(°>><(°>><(°>><(°>
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21st May 2008, 08:28	#22 (permalink)
rogeringebo Custom Title Allowed! Current Rebreather/s: Pelagian Other Rebreather/s: Megalodon Classic Kiss Pelagian Join Date: Sep 2005 Location: Stockholm Sweden Posts: 702	Re: Tried the Pelagian.... Quote: (Originally Posted by PnL) Roger - were you able to sling multiple bottles on one side without it affecting the inhale counterlung? I typically sling all my bottles on the left ... its a vestige left over from my OC tech days and one that I feel comfortable with. Thanks, Paul Hi Paul! I like to sling my stuff on 2 sides but either way works just fine. I have dived with 3 alu 80s on the left side and 2 on the right with out any effects on the breathing capacity on my my CLs. If I would decide on wearing it all on one side I would sling 2 tanks and put the rest on a leach trailing from my hip d-ring Gue style...works just fine... When it comes to testing the scrubber capacity there has been no testing in a lab or simular. Personally I go more on how much sorb can fit and the work of breathing that will determine your co2 production among other things. As the Pelagian breaths very well, is super small and compact for low co2 production and have one of the biggest scrubbers on the market I build my trust on that. Apart from all the diving I have done on it of course.... Dont care to much for CE testing and simular personally but I guess Im more of a practical kind of guy. What works works sort of.... What can put you in trouble in a CCR dive I belive is not going to have anything to do with a stamp on your weapon of choice when it comes to diving. Dive safe! Cheers Rogee
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23rd May 2008, 16:15	#23 (permalink)
PnL Custom Title Allowed! Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Mar 2007 Location: San Diego, CA Posts: 183	Re: Tried the Pelagian.... Good to hear that slinging multiple bottles doesn't cause a problem. Here is one more question. Since the D-rings on the shoulder straps are underneath the counterlungs, where do you clip things off (like backup lights, etc) while diving? Or is it easy enough to get to the D-rings - this is something that I did not try when diving the Pelagian. Thanks, Paul __________________ SDTechDiving.com - A San Diego Technical Diving Community
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24th May 2008, 00:23	#24 (permalink)
rogeringebo Custom Title Allowed! Current Rebreather/s: Pelagian Other Rebreather/s: Megalodon Classic Kiss Pelagian Join Date: Sep 2005 Location: Stockholm Sweden Posts: 702	Re: Tried the Pelagian.... Hi! It very easy reaching your d rings... I use standard model but found a slightly bigger version I like. There is a version that stands out sideways that some Meg and Inspo divers use. I tried those but did not like them as they kept interfering with arm movement at the biceps. I think you can get them from Golem gear or Narked at 90? You can not put back up light on the webbing as it would be in the way of the CL velcro. I just keep one in each thigh pocket. Works just fine. Cheers Roger
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24th May 2008, 16:43	#25 (permalink)
fireman rEvo combat swimmer Current Rebreather/s: rEvo Other CCR Other Rebreather/s: rEvo Other CCR Join Date: Nov 2006 Location: chicago Posts: 518	Re: Tried the Pelagian.... My rebreather has a simple fool proof way of adapting the O2 flow to changing metabolic needs also--manual add... __________________ Heres to you Capt. Bill Never Forget, and stay safe everyone.
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24th May 2008, 17:00	#26 (permalink)
PnL Custom Title Allowed! Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Mar 2007 Location: San Diego, CA Posts: 183	Re: Tried the Pelagian.... Quote: (Originally Posted by fireman) My rebreather has a simple fool proof way of adapting the O2 flow to changing metabolic needs also--manual add... And how is that different from the Pelagian? I know what you are getting at, but the needle valve does more than just set O2 delivery rates, it also eliminates a blocked first stage so there are no depth limitations. All mCCR's that use a CMF require a blocked first stage and, therefore, has an inherent depth limitation dependent on the IP of that first stage. That is the largest difference to me, although being able to adjust the flow rate is pretty slick. I found it easy to set and its nice not to constantly hit the O2 add button. __________________ SDTechDiving.com - A San Diego Technical Diving Community
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