Dolphin like Rebreather

TR300 · 8th June 2006, 15:44

Hi,

after making the TR300 (now are 15 Rigs in use) I was just playing around in designing a small an lightweight rebreather.

For me some points are important in the design:

Liteweight
easy to maintain (assemble / disassemble)
good working watertrap
KISS Style oxygen support
cheap
transportable (speziell for Holidayflights)

My first prototype is now ready (pictures follow)
It looks like a Dolphin, but is half of weight.

the outer frame can (in future) be folded together so the hole rebreather should fit a small handbag.

the scrubber holds 1.0 kg sodalime

I just thinking in going to manufakture the rig

therefore I just looking for some parts. perhaps the community has some ideas

Holger

ERIK_A · 8th June 2006, 20:10

cant wait to see it

shell-back · 8th June 2006, 20:59

Oh, thats so anticlimactic.

Main Entry: an·ti·cli·max

Pronunciation: -'klI-"maks
Function: noun
1 : the usually sudden transition in discourse from a significant idea to a trivial or ludicrous idea; also : an instance of this transition
2 : an event (as at the end of a series) that is strikingly less important than what has preceded it

lets see the goods !!!!

Sutty · 9th June 2006, 03:14

Hi Holger,
Looks interesting!
What is the counterlung produced from? Is this a commercially available bellows?

Neil

TR300 · 9th June 2006, 12:55

Hi,

now I have some pictures.

be aware it is just a prototype and the finish will change

at the moment the housing is made from steel. the counterlungs are from MSR (6 Liter, because I need the length) and Ortlieb (4 Liter).

The scrubber is vertikal between the both counterlung. the exhale counterlung is connected at the bottom of the scrubber. there is also a Overpressure / dumpvalve (it should be possible to drain some water).

The scrubber is 25cm in hight and has a inner diameter of 9cm. All connectors are at the moment P-Plugs.

TR300sc open all assembled together.

TR300sc inhale side (top) the bypass is missing

TR300sc exhale side (bottom) with the overpressure valve.

TR300sc top with breathing hose connected (bypass still missing :-) )

TR300sc with two 2 liter cylindes connected.

TR300sc complet with closed housing.

enjoy

I`am now looking for someone who can me help with the counterlungs. It will be better when I can get some who are fits better. I know this is very difficult, because no facturing will produce just a couple of them.

for the housing I will do this in kevlar.

the scrubber parts are ready for a cnc drilling mashine.

Holger

**Dave1w** · 10th June 2006, 15:27

Hello,
Looks nice. A couple of questions. Is it easy enough putting P-Ports into the MSR lid? And where did you get the box from?
Cheers
Dave

TR300 · 30th June 2006, 09:13

Quote: (Originally Posted by Dave1w)

Hello,
Looks nice. A couple of questions. Is it easy enough putting P-Ports into the MSR lid? And where did you get the box from?
Cheers
Dave

Hi Dave,

yes it is easy to put p-conns in the bags. but the surface of the bags are rough so you have to put some silicon or aquasure first for watertight.

the bos is made from my facturer who does most of my material.

Holger

TR300 · 30th June 2006, 09:16

Hi,

I just do some minor changes to the scrubber, it is now easy to close and open.

Scrubbercanister

Bottom

Head

TR300sc scrubber a part, Head, Bottom, Stainless steel cambands, Stainless steel filters and plexitube.

Holger

GKAM · 30th June 2006, 10:50

Very interesting design, Holger!

I was looking at your pictures and I was puzzled a bit by the exhalation CL. It looks like it connects to the bottom of the stack. Should it not be more practical to swap around the CLs? Having the exhalation CL connect to the highest point would allow for water to enter the bag but not travel into the scrubber column.

What is your reasoning behind the CL connection being the way it is now?

Thx,
George

TR300 · 30th June 2006, 13:26

Quote: (Originally Posted by GKAM)

Very interesting design, Holger!

I was looking at your pictures and I was puzzled a bit by the exhalation CL. It looks like it connects to the bottom of the stack. Should it not be more practical to swap around the CLs? Having the exhalation CL connect to the highest point would allow for water to enter the bag but not travel into the scrubber column.

What is your reasoning behind the CL connection being the way it is now?

Thx,
George

Hi George,

my idea was, that the water can fall down the exhal CL and should be then be purged out of the system by using the overpressure valve. so theoretical the water should be not reach the scrubber.

In praxis this works, but my exhal CL was not long enough to hold a small amount of water before I can go in upright pos. and be ready to purge. will be changed with the next version when I have other Counterlungs.

Holger

8th June 2006, 15:44	#1 (permalink)
TR300 Home of the TR300 Current Rebreather/s: Other CCR Dolphin Other SCR Home Build Other Rebreather/s: Not Bought Yet Other CCR Dolphin Other SCR Home Build Join Date: Jan 2005 Location: Weinheim, Germany Posts: 179	TR300sc (Dolphin like Rebreather) Hi, after making the TR300 (now are 15 Rigs in use) I was just playing around in designing a small an lightweight rebreather. For me some points are important in the design: Liteweight easy to maintain (assemble / disassemble) good working watertrap KISS Style oxygen support cheap transportable (speziell for Holidayflights) My first prototype is now ready (pictures follow) It looks like a Dolphin, but is half of weight. the outer frame can (in future) be folded together so the hole rebreather should fit a small handbag. the scrubber holds 1.0 kg sodalime I just thinking in going to manufakture the rig therefore I just looking for some parts. perhaps the community has some ideas Holger __________________ If it makes bubbles it means its brocken Visit: www.tr300.com, Missions: www.rebreatherteam.de Last edited by TR300 : 3rd July 2006 at 08:02.
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8th June 2006, 20:10	#2 (permalink)
ERIK_A New Member Current Rebreather/s: Dolphin Other Rebreather/s: Dolphin Join Date: Dec 2005 Location: on O2 at 20 feet Posts: 60	Re: Dolphin like Rebreather cant wait to see it __________________
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8th June 2006, 20:59	#3 (permalink)
shell-back I do all my own stunts Current Rebreather/s: Other CCR Dolphin Ray Azimuth Other SCR Home Build Other Rebreather/s: Other CCR Dolphin Ray Azimuth Other SCR Home Build Join Date: Jul 2005 Location: middle of US Posts: 481	Re: Dolphin like Rebreather Oh, thats so anticlimactic. Main Entry: an·ti·cli·max Pronunciation: -'klI-"maks Function: noun 1 : the usually sudden transition in discourse from a significant idea to a trivial or ludicrous idea; also : an instance of this transition 2 : an event (as at the end of a series) that is strikingly less important than what has preceded it lets see the goods !!!! __________________ The greatest obstacle to discovery is not ignorance -- it is the illusion of knowledge. ----Daniel Boorstin Billy Beal SDITDI IT #3507 Rebreather World FIGJAM commitee member
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9th June 2006, 03:14	#4 (permalink)
Sutty Classic Kiss diver Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Jun 2005 Location: Glossop, Derbyshire, UK Posts: 763	Re: Dolphin like Rebreather Hi Holger, Looks interesting! What is the counterlung produced from? Is this a commercially available bellows? Neil __________________ Never forget that life is a finite resource.
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9th June 2006, 12:55	#5 (permalink)
TR300 Home of the TR300 Current Rebreather/s: Other CCR Dolphin Other SCR Home Build Other Rebreather/s: Not Bought Yet Other CCR Dolphin Other SCR Home Build Join Date: Jan 2005 Location: Weinheim, Germany Posts: 179	Re: Dolphin like Rebreather Hi, now I have some pictures. be aware it is just a prototype and the finish will change at the moment the housing is made from steel. the counterlungs are from MSR (6 Liter, because I need the length) and Ortlieb (4 Liter). The scrubber is vertikal between the both counterlung. the exhale counterlung is connected at the bottom of the scrubber. there is also a Overpressure / dumpvalve (it should be possible to drain some water). The scrubber is 25cm in hight and has a inner diameter of 9cm. All connectors are at the moment P-Plugs. TR300sc open all assembled together. TR300sc inhale side (top) the bypass is missing TR300sc exhale side (bottom) with the overpressure valve. TR300sc top with breathing hose connected (bypass still missing :-) ) TR300sc with two 2 liter cylindes connected. TR300sc complet with closed housing. enjoy I`am now looking for someone who can me help with the counterlungs. It will be better when I can get some who are fits better. I know this is very difficult, because no facturing will produce just a couple of them. for the housing I will do this in kevlar. the scrubber parts are ready for a cnc drilling mashine. Holger __________________ If it makes bubbles it means its brocken Visit: www.tr300.com, Missions: www.rebreatherteam.de Last edited by TR300 : 9th June 2006 at 13:13.
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10th June 2006, 15:27	#6 (permalink)
Dave1w Born Again Diver! Current Rebreather/s: Sport Kiss Dolphin Ray Home Build Other Rebreather/s: Dolphin Ray Home Build Join Date: Jan 2005 Location: China / UK Posts: 312	Re: Dolphin like Rebreather Hello, Looks nice. A couple of questions. Is it easy enough putting P-Ports into the MSR lid? And where did you get the box from? Cheers Dave
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30th June 2006, 09:13	#7 (permalink)
TR300 Home of the TR300 Current Rebreather/s: Other CCR Dolphin Other SCR Home Build Other Rebreather/s: Not Bought Yet Other CCR Dolphin Other SCR Home Build Join Date: Jan 2005 Location: Weinheim, Germany Posts: 179	Re: Dolphin like Rebreather Quote: (Originally Posted by Dave1w) Hello, Looks nice. A couple of questions. Is it easy enough putting P-Ports into the MSR lid? And where did you get the box from? Cheers Dave Hi Dave, yes it is easy to put p-conns in the bags. but the surface of the bags are rough so you have to put some silicon or aquasure first for watertight. the bos is made from my facturer who does most of my material. Holger __________________ If it makes bubbles it means its brocken Visit: www.tr300.com, Missions: www.rebreatherteam.de
(Offline)

30th June 2006, 09:16	#8 (permalink)
TR300 Home of the TR300 Current Rebreather/s: Other CCR Dolphin Other SCR Home Build Other Rebreather/s: Not Bought Yet Other CCR Dolphin Other SCR Home Build Join Date: Jan 2005 Location: Weinheim, Germany Posts: 179	Re: Dolphin like Rebreather Hi, I just do some minor changes to the scrubber, it is now easy to close and open. Scrubbercanister Bottom Head TR300sc scrubber a part, Head, Bottom, Stainless steel cambands, Stainless steel filters and plexitube. Holger __________________ If it makes bubbles it means its brocken Visit: www.tr300.com, Missions: www.rebreatherteam.de
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30th June 2006, 10:50	#9 (permalink)
GKAM digital nomad Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: May 2005 Location: Greece Posts: 246	Re: Dolphin like Rebreather Very interesting design, Holger! I was looking at your pictures and I was puzzled a bit by the exhalation CL. It looks like it connects to the bottom of the stack. Should it not be more practical to swap around the CLs? Having the exhalation CL connect to the highest point would allow for water to enter the bag but not travel into the scrubber column. What is your reasoning behind the CL connection being the way it is now? Thx, George __________________ Stay #
(Online)

30th June 2006, 13:26	#10 (permalink)
TR300 Home of the TR300 Current Rebreather/s: Other CCR Dolphin Other SCR Home Build Other Rebreather/s: Not Bought Yet Other CCR Dolphin Other SCR Home Build Join Date: Jan 2005 Location: Weinheim, Germany Posts: 179	Re: Dolphin like Rebreather Quote: (Originally Posted by GKAM) Very interesting design, Holger! I was looking at your pictures and I was puzzled a bit by the exhalation CL. It looks like it connects to the bottom of the stack. Should it not be more practical to swap around the CLs? Having the exhalation CL connect to the highest point would allow for water to enter the bag but not travel into the scrubber column. What is your reasoning behind the CL connection being the way it is now? Thx, George Hi George, my idea was, that the water can fall down the exhal CL and should be then be purged out of the system by using the overpressure valve. so theoretical the water should be not reach the scrubber. In praxis this works, but my exhal CL was not long enough to hold a small amount of water before I can go in upright pos. and be ready to purge. will be changed with the next version when I have other Counterlungs. Holger __________________ If it makes bubbles it means its brocken Visit: www.tr300.com, Missions: www.rebreatherteam.de
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