Ray in ccr

eXile · 10th June 2008, 04:39

I noticed last night when I was browsing TechMe's site that there are now 3 sensor holders availible for the Ray Scrubber. I have one I am converting to an mCCR at the moment and I am not even thinking about using the scrubber as I believe it would be highly restictive to breathing efficiency. Just wondering if anyone has used one of these scrubbers for CCR and if so how was the WOB and what sort of time can you get off such a small canister??? Paul

**Dave1w** · 10th June 2008, 04:46

Hi Paul
Drager rates it for 110 mins in warmer water, and as an SCR the breathing isn't that bad is it?

I have 1 and 3/4 that I will be closing just as soon as I get around to it. I have all the rest of teh stuff I need. I like Martin's mod. He amazies me in producing solutions. I don't think anyone else has taken the time to put so many differnt thoughts to market. He must just love fiddling!

Cheers
Dave

ChristianM · 10th June 2008, 07:16

Hi Paul,

maybe you have seen this.
Mike Wescombe-Down CCRay
He used the new sensor holder. He also stated the time he can get out of the scrubber.
PoseidonSv has build a CCR with a Ray Scrubber. http://www.rebreatherworld.com/home-...nd-tested.html

I have only used the Ray once as CCR. I was happy with the WOB in this try.
The only thing I notice was that at the end of the dive where the BC was almost empty it seems that the size of the CL have been restricted. The ADV was firing almost every breath. I was using 8kg of lead and two 2l steels.

Cheers!
Christian

lizardland · 10th June 2008, 09:51

I used the guts of a Ray in a couple of homebuilds. A backmounted Rebreather: rb_views and a sidemount unit: http://www.lizardland.co.uk/RB/RB_Pr.../311004-02.jpg

I never had a stock Ray so couldn't say what the WOB was like. However, I think the scrubber is far too small for CCR use. It only holds 1.25kg of lime and I had breakthrough a few times a LOT quicker than the manufacturers data, 30min on some dives and it is easy to overbreathe it. It is however a nicely made little scrubber despite the short lifespan, there is space in the head above the top screen for two R17/R22 cells and you can easily put a bulkhead fitting for the wiring in the top of the lid. I keep it now in the car as an oxygen rebreather rather than carrying an oxygen kit for emergencies.

The FGT scrubber looks a bit more realistic as an "off the shelf" unit (if you can find one), looks superficially like a scaled up Ray can.

Numpty diver · 10th June 2008, 10:32

Ray o2 safety ccr thats a real good idea stuart, any details please?
The Ray scr i think was / is one of the best scrs out there.
I tried making it a ccr .. it created more and more problems to solve.. i gave up !!..
Numpty

eXile · 10th June 2008, 10:52

I also found with my ray that the adv fired often, i finally tracked it down to the counterlungs being heavily restricted. I have not dived the unit since and it sits in a lot of pieces. I may have to reassemble the little unit and try again, or more likely i will canabalise it and use it for parts for a new homebuild. Thanks for your help everyone

lizardland · 10th June 2008, 13:32

Quote: (Originally Posted by Numpty diver)

Ray o2 safety ccr thats a real good idea stuart, any details please?

Nothing fancy:

Some parts should look familiar

The dump on the ABLJ was replaced by a p-port where the scrubber plugs in, one end of the loop hose goes to another p-port on the ABLJ, other end is on the scrubber.

Plug O2 in at the inflator for the ABLJ and just manually add when the lung gets tight. I'd built it originally thinking I could use it as a manual SCR for bailout, it worked but it was all a bit bulky. So now I can wear it whilst driving myself to the pot the next time I get bent rather than an ally 80 in the back and a 2m hose

ChristianM · 10th June 2008, 13:42

I have the problem only in the shallow part of the dive. The deeper part was fine. I guess because of the BC was filled a bit.
Christian

Numpty diver · 11th June 2008, 06:04

The Pot Again !
Simple bit of kit .. I like .
Mouth piece looks familiar .
Thank you
Dean

Marc T · 11th June 2008, 07:20

Quote: (Originally Posted by eXile)

I also found with my ray that the adv fired often, i finally tracked it down to the counterlungs being heavily restricted. I have not dived the unit since and it sits in a lot of pieces. I may have to reassemble the little unit and try again, or more likely i will canabalise it and use it for parts for a new homebuild. Thanks for your help everyone

Little secret with the Ray CL size issue is just not try to tighten the shoulders strap of the BCD.Mine in CCR have two sensor in the head with a lumberg connector on top.Only one tank on the rig at the normal place ( can be O2 or dil ) and the other sidemounted ( sidefloating in fact ).Small rig dont worth a big project.next project for this one is putting a dolphin scrubber at the tank place ( can hold two sensors inside too ) but not sure its worth the pain because of small CL so again small siezd rig dont worth a big project, stay small and simpiest as possible.

10th June 2008, 04:39	#1 (permalink)
eXile New Member Current Rebreather/s: Ray Other Rebreather/s: Ray Join Date: Jan 2007 Location: Jervis Bay, Australia Posts: 17	Ray in ccr I noticed last night when I was browsing TechMe's site that there are now 3 sensor holders availible for the Ray Scrubber. I have one I am converting to an mCCR at the moment and I am not even thinking about using the scrubber as I believe it would be highly restictive to breathing efficiency. Just wondering if anyone has used one of these scrubbers for CCR and if so how was the WOB and what sort of time can you get off such a small canister??? Paul
(Offline)

10th June 2008, 04:46	#2 (permalink)
Dave1w Born Again Diver! Current Rebreather/s: Sport Kiss Dolphin Ray Home Build Other Rebreather/s: Classic Kiss Dolphin Ray Home Build Join Date: Jan 2005 Location: Singapore / UK Posts: 378	Re: Ray in ccr Hi Paul Drager rates it for 110 mins in warmer water, and as an SCR the breathing isn't that bad is it? I have 1 and 3/4 that I will be closing just as soon as I get around to it. I have all the rest of teh stuff I need. I like Martin's mod. He amazies me in producing solutions. I don't think anyone else has taken the time to put so many differnt thoughts to market. He must just love fiddling! Cheers Dave __________________ This message may contain spelling mistakes as it was generated by an idiot.
(Online)

10th June 2008, 07:16	#3 (permalink)
ChristianM RBW Member Current Rebreather/s: Dolphin Home Build Other Rebreather/s: Dolphin Home Build Join Date: Sep 2005 Location: Germany Posts: 59	Re: Ray in ccr Hi Paul, maybe you have seen this. Mike Wescombe-Down CCRay He used the new sensor holder. He also stated the time he can get out of the scrubber. PoseidonSv has build a CCR with a Ray Scrubber. http://www.rebreatherworld.com/home-...nd-tested.html I have only used the Ray once as CCR. I was happy with the WOB in this try. The only thing I notice was that at the end of the dive where the BC was almost empty it seems that the size of the CL have been restricted. The ADV was firing almost every breath. I was using 8kg of lead and two 2l steels. Cheers! Christian
(Offline)

10th June 2008, 09:51	#4 (permalink)
lizardland Yak Current Rebreather/s: MK 15.X Home Build Other Rebreather/s: Classic Kiss Home Build Join Date: Mar 2005 Location: North... Posts: 1,387	Re: Ray in ccr I used the guts of a Ray in a couple of homebuilds. A backmounted Rebreather: rb_views and a sidemount unit: http://www.lizardland.co.uk/RB/RB_Pr.../311004-02.jpg I never had a stock Ray so couldn't say what the WOB was like. However, I think the scrubber is far too small for CCR use. It only holds 1.25kg of lime and I had breakthrough a few times a LOT quicker than the manufacturers data, 30min on some dives and it is easy to overbreathe it. It is however a nicely made little scrubber despite the short lifespan, there is space in the head above the top screen for two R17/R22 cells and you can easily put a bulkhead fitting for the wiring in the top of the lid. I keep it now in the car as an oxygen rebreather rather than carrying an oxygen kit for emergencies. The FGT scrubber looks a bit more realistic as an "off the shelf" unit (if you can find one), looks superficially like a scaled up Ray can. __________________ Can you imagine drifting along in the sea with your mouth open and a load of f***ing plankton going in? You'd like it, would you? www.westons-cider.co.uk Azerbaijani Association of Technical Divers Publicity Officer and Goat Wrangler
(Offline)

10th June 2008, 10:32	#5 (permalink)
Numpty diver RBW Member Current Rebreather/s: Megalodon Other CCR Dolphin Ray Home Build Other Rebreather/s: Other CCR Dolphin Ray Home Build Join Date: Jul 2006 Location: Norway, Bergen Posts: 282	Re: Ray in ccr Ray o2 safety ccr thats a real good idea stuart, any details please? The Ray scr i think was / is one of the best scrs out there. I tried making it a ccr .. it created more and more problems to solve.. i gave up !!.. Numpty
(Offline)

10th June 2008, 10:52	#6 (permalink)
eXile New Member Current Rebreather/s: Ray Other Rebreather/s: Ray Join Date: Jan 2007 Location: Jervis Bay, Australia Posts: 17	Re: Ray in ccr I also found with my ray that the adv fired often, i finally tracked it down to the counterlungs being heavily restricted. I have not dived the unit since and it sits in a lot of pieces. I may have to reassemble the little unit and try again, or more likely i will canabalise it and use it for parts for a new homebuild. Thanks for your help everyone
(Offline)

10th June 2008, 13:32	#7 (permalink)
lizardland Yak Current Rebreather/s: MK 15.X Home Build Other Rebreather/s: Classic Kiss Home Build Join Date: Mar 2005 Location: North... Posts: 1,387	Re: Ray in ccr Quote: (Originally Posted by Numpty diver) Ray o2 safety ccr thats a real good idea stuart, any details please? Nothing fancy: Some parts should look familiar The dump on the ABLJ was replaced by a p-port where the scrubber plugs in, one end of the loop hose goes to another p-port on the ABLJ, other end is on the scrubber. Plug O2 in at the inflator for the ABLJ and just manually add when the lung gets tight. I'd built it originally thinking I could use it as a manual SCR for bailout, it worked but it was all a bit bulky. So now I can wear it whilst driving myself to the pot the next time I get bent rather than an ally 80 in the back and a 2m hose __________________ Can you imagine drifting along in the sea with your mouth open and a load of f***ing plankton going in? You'd like it, would you? www.westons-cider.co.uk Azerbaijani Association of Technical Divers Publicity Officer and Goat Wrangler
(Offline)

10th June 2008, 13:42	#8 (permalink)
ChristianM RBW Member Current Rebreather/s: Dolphin Home Build Other Rebreather/s: Dolphin Home Build Join Date: Sep 2005 Location: Germany Posts: 59	Re: Ray in ccr I have the problem only in the shallow part of the dive. The deeper part was fine. I guess because of the BC was filled a bit. Christian
(Offline)

11th June 2008, 06:04	#9 (permalink)
Numpty diver RBW Member Current Rebreather/s: Megalodon Other CCR Dolphin Ray Home Build Other Rebreather/s: Other CCR Dolphin Ray Home Build Join Date: Jul 2006 Location: Norway, Bergen Posts: 282	Re: Ray in ccr The Pot Again ! Simple bit of kit .. I like . Mouth piece looks familiar . Thank you Dean
(Offline)

11th June 2008, 07:20	#10 (permalink)
Marc T hell is in the details Current Rebreather/s: RB80 / Clone Home Build Other Rebreather/s: Not Bought Yet RB80 / Clone Home Build Join Date: Sep 2005 Location: FRANCE Carcassonne Posts: 498	Re: Ray in ccr Quote: (Originally Posted by eXile) I also found with my ray that the adv fired often, i finally tracked it down to the counterlungs being heavily restricted. I have not dived the unit since and it sits in a lot of pieces. I may have to reassemble the little unit and try again, or more likely i will canabalise it and use it for parts for a new homebuild. Thanks for your help everyone Little secret with the Ray CL size issue is just not try to tighten the shoulders strap of the BCD.Mine in CCR have two sensor in the head with a lumberg connector on top.Only one tank on the rig at the normal place ( can be O2 or dil ) and the other sidemounted ( sidefloating in fact ).Small rig dont worth a big project.next project for this one is putting a dolphin scrubber at the tank place ( can hold two sensors inside too ) but not sure its worth the pain because of small CL so again small siezd rig dont worth a big project, stay small and simpiest as possible.
(Offline)

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