Twin CCR for deep cave exploration

Drmike · 4th February 2007, 09:58

I should point out that I built this to do Sra Keow (sub 210m) to give additional safety where its most needed (at depth) at these depths OC gas consumption is crazy fast so Im happy if this unit is only SCR because that would still give me a major safety advantage (buddys are diving single CCR so there is, and we are carrying, full OC bail out anyway on these dives

This is why I may sound vague and not all that concerned about how many cells or what display its using - Im happy on this expedition if I only run it mSCR - cells make it more usefull though.

As staging/clearing and paying for deep bail tanks is a pain - if it goes well Im sure Cedric will want one - so next time - who knows if we have OC bail gas at all

Drmike · 4th February 2007, 10:00

Quote: (Originally Posted by tecdivertraining)

looking forward to seeing it next week. how do you think it will work with my meg?

PS did you sort out the sofnolime and how much was the excess.

cheers

should work fine - but may need to find room on your shoulders for 4 T pieces

tecdivertraining · 4th February 2007, 10:07

Quote: (Originally Posted by Drmike)

should work fine - but may need to find room on your shoulders for 4 T pieces

what are you saying I have small shoulders

Drmike · 4th February 2007, 10:10

Quote: (Originally Posted by tecdivertraining)

what are you saying I have small shoulders

only room for a small chip then

tecdivertraining · 4th February 2007, 10:24

Quote: (Originally Posted by Drmike)

only room for a small chip then

A person who has "a chip on his shoulder" is angry because of some thing that happened in the past. Example: "He lost his game this morning, and now he has a chip on his shoulder." It is easy for a person to get in a fight when he has a chip on his shoulder, because he is already angry about something else. Example: "Watch out for that guy, he's got a chip on his shoulder." To start a fight, men used to put chips of wood on their shoulder and challenge others to "try to knock it off". Example: "What's bothering that guy?" Reply: "Nothing. He's just got a chip on the shoulder." Example: "Tom had a tough time growing up, so he's got a bit of a chip on his shoulder." You can use the definite article ("the") which sounds more general ("a chip on the shoulder"), but more often people use the personal pronoun ("his", "her", "their") to say that that specific person has "a chip on his (her, their) shoulder."

for sure not me then....

Drmike · 4th February 2007, 11:15

Quote: (Originally Posted by tecdivertraining)

for sure not me then....

Looks like you have a chip on your shoulder about having a chip on your shoulder. lol

Ben Field · 4th February 2007, 11:21

Nice project DrCat! Kinda reminisent of the Halcyon Fridge scrubber.... but not in a bad way

Would seem to be the obvious accessory for the expiditions Rebreather divers choice of rebreather, actually I don't see anything that would stop it being combined with other units?

Good luck with the cave.

DrJM · 4th February 2007, 18:10

Sounds like an offspring of Paul Garske and Dave Apperley units

If you go in production I could be interested.

Regarding swapping units, I'm not convince on such dive, you gona pre-breath both of them before that's for sure, but your descent will be roughly quick ? I guess 15-20 m/min so before you bounce it will be 10-15 minutes in a 25 deg water, so the sorb of the second Rebreather should still be workable. BUT by swapping units you're at risk of having water ingress via the moupieces, so ...

Does the gas volume of the 2nd Rebreather raise your bum

therefore avoiding the need of a custom synthetic foam base ?

All my best over there

Jerome

DrJM · 4th February 2007, 18:14

PS - can you still reach the Dil and O2 shut off valves of Boris ?

- you gona cover/protect the hose of the 2nd Rebreather ?

- did you put an hydrophobic membrane in the 2nd Rebreather ?

- is the OPV on the scrubber or on the counterlungs ? if on the scrubber any risk of the gas being kicked out when head down ? (usual problem on side mount Rebreather like DDD)

ok I stop questionning ... for a while

Jerome

silent running · 5th February 2007, 00:36

Mike, thanks a lot for sharing the project and making us all even more envious.

-I'm wondering where exactly the 2nd BMCLs are placed. Any more pix coming?

-And I'm not sure I understand how the WOB can be any better than a side mount with your loop gas traveling all the way to the 2nd scrubber and back?

4th February 2007, 09:58	#11 (permalink)
Drmike Custom Title Allowed! Current Rebreather/s: MK 15.X Ouroboros Other CCR Home Build Other Rebreather/s: Inspiration Classic Other CCR Home Build Join Date: Feb 2005 Posts: 3,322	Re: Twin CCR for deep cave exploration I should point out that I built this to do Sra Keow (sub 210m) to give additional safety where its most needed (at depth) at these depths OC gas consumption is crazy fast so Im happy if this unit is only SCR because that would still give me a major safety advantage (buddys are diving single CCR so there is, and we are carrying, full OC bail out anyway on these dives This is why I may sound vague and not all that concerned about how many cells or what display its using - Im happy on this expedition if I only run it mSCR - cells make it more usefull though. As staging/clearing and paying for deep bail tanks is a pain - if it goes well Im sure Cedric will want one - so next time - who knows if we have OC bail gas at all __________________ Cave diving is a sport Wreck diving is a sport Diving in general is a sport 'Rebreather diving' is not a sport its the delusional obsession with a highly dangerous and often inappropriate piece of equipment Last edited by Drmike : 4th February 2007 at 10:03.
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4th February 2007, 10:00	#12 (permalink)
Drmike Custom Title Allowed! Current Rebreather/s: MK 15.X Ouroboros Other CCR Home Build Other Rebreather/s: Inspiration Classic Other CCR Home Build Join Date: Feb 2005 Posts: 3,322	Re: Twin CCR for deep cave exploration Quote: (Originally Posted by tecdivertraining) looking forward to seeing it next week. how do you think it will work with my meg? PS did you sort out the sofnolime and how much was the excess. cheers should work fine - but may need to find room on your shoulders for 4 T pieces __________________ Cave diving is a sport Wreck diving is a sport Diving in general is a sport 'Rebreather diving' is not a sport its the delusional obsession with a highly dangerous and often inappropriate piece of equipment
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4th February 2007, 10:07	#13 (permalink)
tecdivertraining RebreatherWorld Sponsor Current Rebreather/s: Inspiration Classic Inspiration Vision Evolution Megalodon Ouroboros Dolphin Other Rebreather/s: Not Bought Yet Dolphin Join Date: May 2005 Location: Phuket, Thailand Posts: 462	Re: Twin CCR for deep cave exploration Quote: (Originally Posted by Drmike) should work fine - but may need to find room on your shoulders for 4 T pieces what are you saying I have small shoulders __________________ Mathew Partridge Technical Director Pro-Tech Dive College www.protechdivers.com www.tech-ccr.com
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4th February 2007, 10:10	#14 (permalink)
Drmike Custom Title Allowed! Current Rebreather/s: MK 15.X Ouroboros Other CCR Home Build Other Rebreather/s: Inspiration Classic Other CCR Home Build Join Date: Feb 2005 Posts: 3,322	Re: Twin CCR for deep cave exploration Quote: (Originally Posted by tecdivertraining) what are you saying I have small shoulders only room for a small chip then __________________ Cave diving is a sport Wreck diving is a sport Diving in general is a sport 'Rebreather diving' is not a sport its the delusional obsession with a highly dangerous and often inappropriate piece of equipment
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4th February 2007, 10:24	#15 (permalink)
tecdivertraining RebreatherWorld Sponsor Current Rebreather/s: Inspiration Classic Inspiration Vision Evolution Megalodon Ouroboros Dolphin Other Rebreather/s: Not Bought Yet Dolphin Join Date: May 2005 Location: Phuket, Thailand Posts: 462	Re: Twin CCR for deep cave exploration Quote: (Originally Posted by Drmike) only room for a small chip then A person who has "a chip on his shoulder" is angry because of some thing that happened in the past. Example: "He lost his game this morning, and now he has a chip on his shoulder." It is easy for a person to get in a fight when he has a chip on his shoulder, because he is already angry about something else. Example: "Watch out for that guy, he's got a chip on his shoulder." To start a fight, men used to put chips of wood on their shoulder and challenge others to "try to knock it off". Example: "What's bothering that guy?" Reply: "Nothing. He's just got a chip on the shoulder." Example: "Tom had a tough time growing up, so he's got a bit of a chip on his shoulder." You can use the definite article ("the") which sounds more general ("a chip on the shoulder"), but more often people use the personal pronoun ("his", "her", "their") to say that that specific person has "a chip on his (her, their) shoulder." for sure not me then.... __________________ Mathew Partridge Technical Director Pro-Tech Dive College www.protechdivers.com www.tech-ccr.com
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4th February 2007, 11:15	#16 (permalink)
Drmike Custom Title Allowed! Current Rebreather/s: MK 15.X Ouroboros Other CCR Home Build Other Rebreather/s: Inspiration Classic Other CCR Home Build Join Date: Feb 2005 Posts: 3,322	Re: Twin CCR for deep cave exploration Quote: (Originally Posted by tecdivertraining) for sure not me then.... Looks like you have a chip on your shoulder about having a chip on your shoulder. lol __________________ Cave diving is a sport Wreck diving is a sport Diving in general is a sport 'Rebreather diving' is not a sport its the delusional obsession with a highly dangerous and often inappropriate piece of equipment
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4th February 2007, 11:21	#17 (permalink)
Ben Field CK+Shearwater Current Rebreather/s: Classic Kiss Other Rebreather/s: Sport Kiss Join Date: Aug 2005 Location: London, England Posts: 1,620	Re: Twin CCR for deep cave exploration Nice project DrCat! Kinda reminisent of the Halcyon Fridge scrubber.... but not in a bad way Would seem to be the obvious accessory for the expiditions Rebreather divers choice of rebreather, actually I don't see anything that would stop it being combined with other units? Good luck with the cave. __________________ Know your PPO2, Pre-breath, Use checklists, Validate cells at 6mtrs, Use pure O2 at or near surface, Use a BOV, Don't dive Solo, Change Slime and Cells as recommended by Manufacturer and RTFM! Beware Fridge Suck! www.hugsac.org.uk
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4th February 2007, 18:10	#18 (permalink)
DrJM Deep Cave Explorer Current Rebreather/s: Ouroboros Other Rebreather/s: MK 15.X Join Date: May 2005 Location: France Posts: 344	Re: Twin CCR for deep cave exploration Sounds like an offspring of Paul Garske and Dave Apperley units If you go in production I could be interested. Regarding swapping units, I'm not convince on such dive, you gona pre-breath both of them before that's for sure, but your descent will be roughly quick ? I guess 15-20 m/min so before you bounce it will be 10-15 minutes in a 25 deg water, so the sorb of the second Rebreather should still be workable. BUT by swapping units you're at risk of having water ingress via the moupieces, so ... Does the gas volume of the 2nd Rebreather raise your bum therefore avoiding the need of a custom synthetic foam base ? All my best over there Jerome __________________ www.snoopyloop.com Deep Cave Exploration Last edited by DrJM : 4th February 2007 at 21:16.
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4th February 2007, 18:14	#19 (permalink)
DrJM Deep Cave Explorer Current Rebreather/s: Ouroboros Other Rebreather/s: MK 15.X Join Date: May 2005 Location: France Posts: 344	Re: Twin CCR for deep cave exploration PS - can you still reach the Dil and O2 shut off valves of Boris ? - you gona cover/protect the hose of the 2nd Rebreather ? - did you put an hydrophobic membrane in the 2nd Rebreather ? - is the OPV on the scrubber or on the counterlungs ? if on the scrubber any risk of the gas being kicked out when head down ? (usual problem on side mount Rebreather like DDD) ok I stop questionning ... for a while Jerome __________________ www.snoopyloop.com Deep Cave Exploration Last edited by DrJM : 4th February 2007 at 21:21.
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5th February 2007, 00:36	#20 (permalink)
silent running Mature mouth breather Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Jun 2005 Location: U.S.A. Brooklyn, New York Posts: 1,832	Re: Twin CCR for deep cave exploration Mike, thanks a lot for sharing the project and making us all even more envious. -I'm wondering where exactly the 2nd BMCLs are placed. Any more pix coming? -And I'm not sure I understand how the WOB can be any better than a side mount with your loop gas traveling all the way to the 2nd scrubber and back?
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