Wing as a BOB?

lizardland · 9th October 2007, 10:46

I'm sure I've seen a thread along the same lines previously. Anyone been using their wing as a BOB?

With a few hours to spare, an ABLJ that I got for a tenner off ebay, what's left of my old Ray and my spare DSV (from a Draeger FGT):

My new bailout rebreather!

The idea is:
- no electronics, it's purely a manual SCR. Breathe in, out, in, out, in, out, dump, add new gas, go back to start or pure O2 CCR mode at 6m
- no ADV, because it's running as my BCD there will always be a bit of gas in it
- no real change in kit loading, it's the BCD, it's running off gas I'm carrying anyway so no extra bottles, the only extra item is the scrubber which is small

I had a go on it the other day and I have to say I was impressed at how compact it felt (other than ABLJ's being shite for diving with in general). It worked as a manual SCR (I did a bit on pure O2 mode just to check it all worked), it wasn't a super-performer but it did work.

The next step if it proves viable is to move on to a wing so that I'm diving on exactly the same kit as I was before except for a small scrubber plugged in the bottom of the wing. I'm also considering the addition of a single cell but on the other hand, I know my manual SCR rates.

Before I waste any more money, has anyone else done it? The WOB with the chest mount was OK, I'm curious as to what it will be like with a wing. I'm curious too if I'm

I'd also like to know what the max depth for a Ray scrubber would be in SCR mode. At the moment it's split as to whether I'm considering deep bailout or a way of making deco gas go further on cave dives if I needed to go OC (or where the 6m stop is pushing the KISS over its 3hrs).

Cheers,
Stuart

Woz · 9th October 2007, 10:49

Have a look at Dr Duncan's P1ss rebreather. That's an ABLJ, a dodgy scrubber cannister and is a pendulum type so you don't need the Ray bits.

lizardland · 9th October 2007, 10:53

Quote: (Originally Posted by Woz)

Have a look at Dr Duncan's P1ss rebreather. That's an ABLJ, a dodgy scrubber cannister and is a pendulum type so you don't need the Ray bits.

Duncan's P1SS was what got me down the homebuild route many moons ago. I'd thought of that, using the ABLJ mouthpiece as the DSV with an inline mini-scrubber. The main problem with it was I had to make a scrubber whereas I had the Ray can, a 4-pack of lager and a Saturday afternoon

I also wanted the scrubber out the way which would have meant a lot of dead space on the pendulum.

Cheers,

Stuart

Woz · 9th October 2007, 12:40

Of course soemone with 1/2 a brain would have the hose a large enough diameter so that you could fill it with scrubber material and then you don't need a seperate scrubber- just a hose, a CL and that's your lot.

Very James Bond. I'm sure it would work. Well mostly sure. OK not at all sure.

***Beanie*** · 9th October 2007, 12:46

Quote: (Originally Posted by Woz)

Of course soemone with 1/2 a brain would have the hose a large enough diameter so that you could fill it with scrubber material and then you don't need a seperate scrubber- just a hose, a CL and that's your lot.

Very James Bond. I'm sure it would work. Well mostly sure. OK not at all sure.

It would end up rigid

Woz · 9th October 2007, 12:51

Not if you were very clever. Ummmmmmmmmmmmmmmmmmmm

***Beanie*** · 9th October 2007, 13:24

Quote: (Originally Posted by Woz)

Not if you were very clever. Ummmmmmmmmmmmmmmmmmmm

but then you be dead.....

can't have a flexible scrubber that doesn't allow bypass or breeakthrough

decoweenie · 9th October 2007, 13:33

Quote: (Originally Posted by Beanie)

can't have a flexible scrubber that doesn't allow bypass or breeakthrough

Define "flexible"...

***Beanie*** · 9th October 2007, 13:40

Quote: (Originally Posted by decoweenie)

Define "flexible"...

Enough to be a breathing hose on a Rebreather

ie go from straight to bend radius of 200mm
and to even be stretched.

Woz · 9th October 2007, 13:50

If it was a pendulum BOB you could have a flexible joint just below your mouth, a rigid scrubber and the CL in between your moobs. A bit like those Rebreathers you see on more specialist videos on youTube.

Hmmmm. What duration would you need the scrubber to be?

9th October 2007, 10:46	#1 (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: 1,177	Wing as a BOB? I'm sure I've seen a thread along the same lines previously. Anyone been using their wing as a BOB? With a few hours to spare, an ABLJ that I got for a tenner off ebay, what's left of my old Ray and my spare DSV (from a Draeger FGT): My new bailout rebreather! The idea is: - no electronics, it's purely a manual SCR. Breathe in, out, in, out, in, out, dump, add new gas, go back to start or pure O2 CCR mode at 6m - no ADV, because it's running as my BCD there will always be a bit of gas in it - no real change in kit loading, it's the BCD, it's running off gas I'm carrying anyway so no extra bottles, the only extra item is the scrubber which is small I had a go on it the other day and I have to say I was impressed at how compact it felt (other than ABLJ's being shite for diving with in general). It worked as a manual SCR (I did a bit on pure O2 mode just to check it all worked), it wasn't a super-performer but it did work. The next step if it proves viable is to move on to a wing so that I'm diving on exactly the same kit as I was before except for a small scrubber plugged in the bottom of the wing. I'm also considering the addition of a single cell but on the other hand, I know my manual SCR rates. Before I waste any more money, has anyone else done it? The WOB with the chest mount was OK, I'm curious as to what it will be like with a wing. I'm curious too if I'm I'd also like to know what the max depth for a Ray scrubber would be in SCR mode. At the moment it's split as to whether I'm considering deep bailout or a way of making deco gas go further on cave dives if I needed to go OC (or where the 6m stop is pushing the KISS over its 3hrs). Cheers, Stuart __________________ 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
(Online)

9th October 2007, 10:49	#2 (permalink)
Woz Custom Title Allowed! Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Jun 2005 Location: Nottingham Posts: 185	Re: Wing as a BOB? Have a look at Dr Duncan's P1ss rebreather. That's an ABLJ, a dodgy scrubber cannister and is a pendulum type so you don't need the Ray bits. __________________ Still punting shiny diving tatt to gullible divers www.kitfondle.co.uk
(Offline)

9th October 2007, 10:53	#3 (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: 1,177	Re: Wing as a BOB? Quote: (Originally Posted by Woz) Have a look at Dr Duncan's P1ss rebreather. That's an ABLJ, a dodgy scrubber cannister and is a pendulum type so you don't need the Ray bits. Duncan's P1SS was what got me down the homebuild route many moons ago. I'd thought of that, using the ABLJ mouthpiece as the DSV with an inline mini-scrubber. The main problem with it was I had to make a scrubber whereas I had the Ray can, a 4-pack of lager and a Saturday afternoon I also wanted the scrubber out the way which would have meant a lot of dead space on the pendulum. Cheers, Stuart __________________ 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
(Online)

9th October 2007, 12:40	#4 (permalink)
Woz Custom Title Allowed! Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Jun 2005 Location: Nottingham Posts: 185	Re: Wing as a BOB? Of course soemone with 1/2 a brain would have the hose a large enough diameter so that you could fill it with scrubber material and then you don't need a seperate scrubber- just a hose, a CL and that's your lot. Very James Bond. I'm sure it would work. Well mostly sure. OK not at all sure. __________________ Still punting shiny diving tatt to gullible divers www.kitfondle.co.uk
(Offline)

9th October 2007, 12:46	#5 (permalink)
*Beanie* Politeness officer Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Vision Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,157	Re: Wing as a BOB? Quote: (Originally Posted by Woz) Of course soemone with 1/2 a brain would have the hose a large enough diameter so that you could fill it with scrubber material and then you don't need a seperate scrubber- just a hose, a CL and that's your lot. Very James Bond. I'm sure it would work. Well mostly sure. OK not at all sure. It would end up rigid __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk www.beandiving.co.uk www.beanengineering.co.uk www.divelife.co.uk
(Offline)

9th October 2007, 12:51	#6 (permalink)
Woz Custom Title Allowed! Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Jun 2005 Location: Nottingham Posts: 185	Re: Wing as a BOB? Not if you were very clever. Ummmmmmmmmmmmmmmmmmmm __________________ Still punting shiny diving tatt to gullible divers www.kitfondle.co.uk
(Offline)

9th October 2007, 13:24	#7 (permalink)
*Beanie* Politeness officer Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Vision Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,157	Re: Wing as a BOB? Quote: (Originally Posted by Woz) Not if you were very clever. Ummmmmmmmmmmmmmmmmmmm but then you be dead..... can't have a flexible scrubber that doesn't allow bypass or breeakthrough __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk www.beandiving.co.uk www.beanengineering.co.uk www.divelife.co.uk
(Offline)

9th October 2007, 13:33	#8 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,510	Re: Wing as a BOB? Quote: (Originally Posted by Beanie) can't have a flexible scrubber that doesn't allow bypass or breeakthrough Define "flexible"...
(Offline)

9th October 2007, 13:40	#9 (permalink)
*Beanie* Politeness officer Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Vision Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,157	Re: Wing as a BOB? Quote: (Originally Posted by decoweenie) Define "flexible"... Enough to be a breathing hose on a Rebreather ie go from straight to bend radius of 200mm and to even be stretched. __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk www.beandiving.co.uk www.beanengineering.co.uk www.divelife.co.uk
(Offline)

9th October 2007, 13:50	#10 (permalink)
Woz Custom Title Allowed! Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Jun 2005 Location: Nottingham Posts: 185	Re: Wing as a BOB? If it was a pendulum BOB you could have a flexible joint just below your mouth, a rigid scrubber and the CL in between your moobs. A bit like those Rebreathers you see on more specialist videos on youTube. Hmmmm. What duration would you need the scrubber to be? __________________ Still punting shiny diving tatt to gullible divers www.kitfondle.co.uk
(Offline)

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