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jaap · 17th August 2006, 16:21

Quote: (Originally Posted by Crazyduck)

I really like the photos- that was inventive.
Looks like a Drager or Russian Kip basic fire fighting scrubber?

You know if you had two small scrubbers and a 4 liter counterlung- it would basically would be the Tiger Frog design.

Or this could be incorporated into a Tom Rose pendulum style unit.

Is there a limitation on the dead air space through the breathing hose?

Also Dave Sutton showed how some pendulum rebreathers have separate paths for exhaling and inhaling through the scrubber bed.

Andrew

Yes thats version 3 of my attempts to make an ultracompact O2-Rebreather. The previous ones where chest mounted similar to Tom Rose pendelum or the original Fenzy. But this one is far slimmer. The wing is very oversized as a CL and the DSV on the pictures is rather improvised. But it really nice WOB with the wing _in front of the backplate_ and silent (no annoying sound from checkvalves)

Scrubber is from a Fenzy
http://www.nobubblediving.com/fenzy.htm

Only I ripped out the insulation on the inside of the scrubber to increases its capacity and eliminate the risk for channeling.

But yes, I also have the same setup with the slightly larger KIP-8 scrubber. Even have a crazy half finished shoulder mount conversion of an Exendair-kanister, but its a bit on the big side to fit on shoulder...

I try to keep the dead space as low as possible. The hose and scrubber on the picture has about 0.15l deadspace to the bed. Also since the O2 addition is just by the mouth that helps to ventilate the dead space.

Have dived this version 3 for a maximum of 45 min in ~20 C water and no CO2-problems. That is taking full breaths, if I deliberately take small breaths the not so nice CO2 comes creeping.

Next improvement will be an elbow with a small dumpvalve on the hose. As it is now there is no real possibility to get rid of water. Even if it works fine to go on and off the loop UW its very annoying when a small amount of water gets gurgling in the hose.

Sorry if I'm hijacking the thread with this description.

17th August 2006, 16:21	#9 (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: 445	Re: Semi Rebreather Quote: (Originally Posted by Crazyduck) I really like the photos- that was inventive. Looks like a Drager or Russian Kip basic fire fighting scrubber? You know if you had two small scrubbers and a 4 liter counterlung- it would basically would be the Tiger Frog design. Or this could be incorporated into a Tom Rose pendulum style unit. Is there a limitation on the dead air space through the breathing hose? Also Dave Sutton showed how some pendulum rebreathers have separate paths for exhaling and inhaling through the scrubber bed. Andrew Yes thats version 3 of my attempts to make an ultracompact O2-Rebreather. The previous ones where chest mounted similar to Tom Rose pendelum or the original Fenzy. But this one is far slimmer. The wing is very oversized as a CL and the DSV on the pictures is rather improvised. But it really nice WOB with the wing _in front of the backplate_ and silent (no annoying sound from checkvalves) Scrubber is from a Fenzy http://www.nobubblediving.com/fenzy.htm Only I ripped out the insulation on the inside of the scrubber to increases its capacity and eliminate the risk for channeling. But yes, I also have the same setup with the slightly larger KIP-8 scrubber. Even have a crazy half finished shoulder mount conversion of an Exendair-kanister, but its a bit on the big side to fit on shoulder... I try to keep the dead space as low as possible. The hose and scrubber on the picture has about 0.15l deadspace to the bed. Also since the O2 addition is just by the mouth that helps to ventilate the dead space. Have dived this version 3 for a maximum of 45 min in ~20 C water and no CO2-problems. That is taking full breaths, if I deliberately take small breaths the not so nice CO2 comes creeping. Next improvement will be an elbow with a small dumpvalve on the hose. As it is now there is no real possibility to get rid of water. Even if it works fine to go on and off the loop UW its very annoying when a small amount of water gets gurgling in the hose. Sorry if I'm hijacking the thread with this description.
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