Sidemount Rebreather (BOB in the works)

GKAM · 27th April 2008, 08:13

I just wanted to share with you this: I just love Rebreather World !

This place is a real asset for divers, instructors, homebuilders and the industry. Here is a little baby I put together a couple of months ago with ideas pulled from the forum threads.

It is a sidemount O2 mCCR based on Duncan’s D5 concept. The cost was very low (<100 EUR) since I already had the CMF valve assembly and tank from my IDA. The rest of the components comprise a recycled Buddy DSMB, an old Apeks valve from an *ancient* Polar Bears suit and bits that were left over from my IDA71 when I converted it to mCCR. (DSV, hoses, spare canister). The CNC work to make the mouthpiece adaptor for the Russian DSV, the male P-port connectors and the delrin tube were all machined by a friend for free. Drager p-ports and the IDA to p-port adapters came from Martin at tecme.de

The size is similar to S80 stage tanks and the whole thing sits very snug to the diver's left side. The idea is to use an S40 stage with O2 to feed the system instead of the Steel 2L tank used for the tests.

I think the pics speak for themselves but I am happy to answer any questions. Next step is to add some cells and maybe turn this to a BOB (will need larger bore hoses).

/GKAM

(first test dive

)

RAL · 27th April 2008, 13:34

[quote=GKAM;183696]I just wanted to share with you this: I just love Rebreather World !

This place is a real asset for divers, instructors, homebuilders and the industry. Here is a little baby I put together a couple of months ago with ideas pulled from the forum threads.

It is a sidemount O2 mCCR based on Duncan’s D5 concept. The cost was very low (<100 EUR) since I already had the CMF valve assembly and tank from my IDA. The rest of the components comprise a recycled Buddy DSMB, an old Apeks valve from an *ancient* Polar Bears suit and bits that were left over from my IDA71 when I converted it to mCCR. (DSV, hoses, spare canister). The CNC work to make the mouthpiece adaptor for the Russian DSV, the male P-port connectors and the delrin tube were all machined by a friend for free. Drager p-ports and the IDA to p-port adapters came from Martin at tecme.de

The size is similar to S80 stage tanks and the whole thing sits very snug to the diver's left side. The idea is to use an S40 stage with O2 to feed the system instead of the Steel 2L tank used for the tests.

I think the pics speak for themselves but I am happy to answer any questions. Next step is to add some cells and maybe turn this to a BOB (will need larger bore hoses).

/GKAM

Bravo

RAL

**DeepBlueInnovation** · 27th April 2008, 14:14

nice!

but why are you threatening to iron the lady's hands

although it does explain how you got the cnc work for free!

**Dave1w** · 27th April 2008, 14:26

Does the Buddy SMB seal OK, and what heat with the iron??

Rest of it looks great!

Cheers
Dave

GKAM · 27th April 2008, 14:42

Quote: (Originally Posted by Dave1w)

Does the Buddy SMB seal OK, and what heat with the iron??

Rest of it looks great!

Hi Dave, it works just perfect. Use max heat on the iron and make sure you do the trick with the cooking pan. Place the iron on the rim and leave it there for a few minutes to ensure it gets pretty hot.

Then place the DSMB and apply pressure with the iron. The key is to have heat on both sides of the SMB. For testing, I filled the bag with water and plugged the p-ports before throwing it on the foor and kicking it around a few times. Not a drop of water came out

/GKAM

**Dave1w** · 29th April 2008, 07:01

Hmmm, I happen to have an old buddy dsmb knocking around... Cheaper than MSR bags too!

Cheers
Dave

jaap · 29th April 2008, 11:25

Nice work!

Good "low tech" trick with the sealing of the bag. I tried sealing some liftbags and SMBs using a commecial induction welder but it didn't turn out great, either too easy to tear aparat or too much heat making it melt or catch fire...

Didn't really bother to spend time on finetuning the weldning since I found a nice and cheap CL source.

Stumbled upon some green inflatable camping pillows made by Intex, they cost <1 € a piece (at Ullared, here in Sweden). Bought a bunch of them, made holes for p-ports, removed the inner walls. They are too fragile for unshielded use but worked really nice in the sling-Rebreather (they grey one in this link: Sling-återandningsapparat (sling rebreather)). No leaks after a dozen dives or so.

Here is a link (from an overpriced source) of how the camping pillow looks like:

Amazon.co.uk: Inflatable camping pillow: Toys & Games

GKAM · 29th April 2008, 17:34

Quote: (Originally Posted by jaap)

Here is a link (from an overpriced source) of how the camping pillow looks like:

Amazon.co.uk: Inflatable camping pillow: Toys & Games

cool tip. thanks jaap

(your Rebreather looks good too

)

/GKAM

marcA · 8th May 2008, 18:47

Hello!
Could you explain how is your ADV? It seem's to be a 2d stage of regulator, but how is connected the hose for rebreather alimentation of gas?
If you have a pic of this part... It could resolve a problem I have to do this part of mine...
Thank's
marc

GKAM · 9th May 2008, 05:21

Quote: (Originally Posted by marcA)

Hello!
Could you explain how is your ADV? It seem's to be a 2d stage of regulator, but how is connected the hose for rebreather alimentation of gas?
If you have a pic of this part... It could resolve a problem I have to do this part of mine...

No ADV.

To add gas, I just press the bypass button on the Hydrogom valve. There is no need for an ADV at this stage since this is only a pure O2 rig for now.

/GKAM

27th April 2008, 08:13	#1 (permalink)
GKAM digital nomad Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: May 2005 Location: Greece Posts: 252	Sidemount Rebreather (BOB in the works) I just wanted to share with you this: I just love Rebreather World ! This place is a real asset for divers, instructors, homebuilders and the industry. Here is a little baby I put together a couple of months ago with ideas pulled from the forum threads. It is a sidemount O2 mCCR based on Duncan’s D5 concept. The cost was very low (<100 EUR) since I already had the CMF valve assembly and tank from my IDA. The rest of the components comprise a recycled Buddy DSMB, an old Apeks valve from an ancient Polar Bears suit and bits that were left over from my IDA71 when I converted it to mCCR. (DSV, hoses, spare canister). The CNC work to make the mouthpiece adaptor for the Russian DSV, the male P-port connectors and the delrin tube were all machined by a friend for free. Drager p-ports and the IDA to p-port adapters came from Martin at tecme.de The size is similar to S80 stage tanks and the whole thing sits very snug to the diver's left side. The idea is to use an S40 stage with O2 to feed the system instead of the Steel 2L tank used for the tests. I think the pics speak for themselves but I am happy to answer any questions. Next step is to add some cells and maybe turn this to a BOB (will need larger bore hoses). /GKAM (first test dive ) __________________ Stay #
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27th April 2008, 13:34	#2 (permalink)
RAL Longbottom Time Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Jan 2006 Location: North Florida Posts: 390	Re: Sidemount Rebreather (BOB in the works) [quote=GKAM;183696]I just wanted to share with you this: I just love Rebreather World ! This place is a real asset for divers, instructors, homebuilders and the industry. Here is a little baby I put together a couple of months ago with ideas pulled from the forum threads. It is a sidemount O2 mCCR based on Duncan’s D5 concept. The cost was very low (<100 EUR) since I already had the CMF valve assembly and tank from my IDA. The rest of the components comprise a recycled Buddy DSMB, an old Apeks valve from an ancient Polar Bears suit and bits that were left over from my IDA71 when I converted it to mCCR. (DSV, hoses, spare canister). The CNC work to make the mouthpiece adaptor for the Russian DSV, the male P-port connectors and the delrin tube were all machined by a friend for free. Drager p-ports and the IDA to p-port adapters came from Martin at tecme.de The size is similar to S80 stage tanks and the whole thing sits very snug to the diver's left side. The idea is to use an S40 stage with O2 to feed the system instead of the Steel 2L tank used for the tests. I think the pics speak for themselves but I am happy to answer any questions. Next step is to add some cells and maybe turn this to a BOB (will need larger bore hoses). /GKAM Bravo RAL __________________ The sea does not care about you.
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27th April 2008, 14:14	#3 (permalink)
DeepBlueInnovation Learning to Kiss Current Rebreather/s: Not Bought Yet Other Rebreather/s: Prism Topaz Not Bought Yet Join Date: Sep 2005 Location: Perth, Western Australia Posts: 358	Re: Sidemount Rebreather (BOB in the works) nice! but why are you threatening to iron the lady's hands although it does explain how you got the cnc work for free!
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27th April 2008, 14:26	#4 (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: 343	Re: Sidemount Rebreather (BOB in the works) Does the Buddy SMB seal OK, and what heat with the iron?? Rest of it looks great! Cheers Dave __________________ This message may contain spelling mistakes as it was generated by an idiot.
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27th April 2008, 14:42	#5 (permalink)
GKAM digital nomad Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: May 2005 Location: Greece Posts: 252	Re: Sidemount Rebreather (BOB in the works) Quote: (Originally Posted by Dave1w) Does the Buddy SMB seal OK, and what heat with the iron?? Rest of it looks great! Hi Dave, it works just perfect. Use max heat on the iron and make sure you do the trick with the cooking pan. Place the iron on the rim and leave it there for a few minutes to ensure it gets pretty hot. Then place the DSMB and apply pressure with the iron. The key is to have heat on both sides of the SMB. For testing, I filled the bag with water and plugged the p-ports before throwing it on the foor and kicking it around a few times. Not a drop of water came out /GKAM __________________ Stay #
(Offline)

29th April 2008, 07:01	#6 (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: 343	Re: Sidemount Rebreather (BOB in the works) Hmmm, I happen to have an old buddy dsmb knocking around... Cheaper than MSR bags too! Cheers Dave __________________ This message may contain spelling mistakes as it was generated by an idiot.
(Offline)

29th April 2008, 11:25	#7 (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: 451	Re: Sidemount Rebreather (BOB in the works) Nice work! Good "low tech" trick with the sealing of the bag. I tried sealing some liftbags and SMBs using a commecial induction welder but it didn't turn out great, either too easy to tear aparat or too much heat making it melt or catch fire... Didn't really bother to spend time on finetuning the weldning since I found a nice and cheap CL source. Stumbled upon some green inflatable camping pillows made by Intex, they cost <1 € a piece (at Ullared, here in Sweden). Bought a bunch of them, made holes for p-ports, removed the inner walls. They are too fragile for unshielded use but worked really nice in the sling-Rebreather (they grey one in this link: Sling-återandningsapparat (sling rebreather)). No leaks after a dozen dives or so. Here is a link (from an overpriced source) of how the camping pillow looks like: Amazon.co.uk: Inflatable camping pillow: Toys & Games __________________ My initials: JAAP
(Offline)

29th April 2008, 17:34	#8 (permalink)
GKAM digital nomad Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: May 2005 Location: Greece Posts: 252	Re: Sidemount Rebreather (BOB in the works) Quote: (Originally Posted by jaap) Here is a link (from an overpriced source) of how the camping pillow looks like: Amazon.co.uk: Inflatable camping pillow: Toys & Games cool tip. thanks jaap (your Rebreather looks good too ) /GKAM __________________ Stay #
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8th May 2008, 18:47	#9 (permalink)
marcA New Member Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Jul 2007 Location: France Posts: 2	Re: Sidemount Rebreather (BOB in the works) Hello! Could you explain how is your ADV? It seem's to be a 2d stage of regulator, but how is connected the hose for rebreather alimentation of gas? If you have a pic of this part... It could resolve a problem I have to do this part of mine... Thank's marc
(Offline)

9th May 2008, 05:21	#10 (permalink)
GKAM digital nomad Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: May 2005 Location: Greece Posts: 252	Re: Sidemount Rebreather (BOB in the works) Quote: (Originally Posted by marcA) Hello! Could you explain how is your ADV? It seem's to be a 2d stage of regulator, but how is connected the hose for rebreather alimentation of gas? If you have a pic of this part... It could resolve a problem I have to do this part of mine... No ADV. To add gas, I just press the bypass button on the Hydrogom valve. There is no need for an ADV at this stage since this is only a pure O2 rig for now. /GKAM __________________ Stay #
(Offline)

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