front cunterlungs

Icarusflies · 18th January 2008, 13:32

Hello All;

I am new in this world, still haven't chosen my rebreather but I was wondering what are the advantages of front mounted cunterlung vs back mounted lungs?

Thanks;

Steve

Sutty · 18th January 2008, 13:38

There's a "O" in "counterlung"! My mind boggles at your version!

Icarusflies · 18th January 2008, 13:52

jeez...thank you...any more comments about the post?

Thanks;

Steve

**nigelh** · 18th January 2008, 14:14

Quote: (Originally Posted by Icarusflies)

I am new in this world, still haven't chosen my rebreather but I was wondering what are the advantages of front mounted cunterlung vs back mounted lungs?

The over the shoulder counterlungs are thought to be the choice for Work-of-Breathing but whether this is true and how important WOB is is a matter we debate.
To some people the 'clear chest' is important, to others access to the injectors.

I can't really comment. I like my Inspo with OTS but I haven't dived much else other than my Russian IDA. I notice a lot of current military units are OTS but they have the money and aren't fashion conscious like us kids. I suspect that if there was a definitive 'must have' all rebreathers would be like that and they aren't.

**Lake_Tahoe_Diver** · 18th January 2008, 18:18

Depending on the unit OTS counterlungs act as a watertrap that can be drained while underwater if the need should present itself.

You never know when your dive bubby does something a little silly and the next thing you know you are laughing and spit the DSV out (opps, only happend once)

Icarusflies · 18th January 2008, 18:33

Thanks about the replays.

So if i understand well, OTS are a better solution if we let aside fashion and comfort.

Steve

tibby · 18th January 2008, 18:46

One other downside is if you are into tight squeeze diving (wrecks especially) OTS CLs increase the chances of tear and unwanted CL volume reduction if squeezed by the restriction. Back mounted CLs are usually more protected by some rigid housing which may prevent this.
Also, the "T" pieces shorten the corrugated hoses thus limiting your side-to-side head movement slightly more than with BMCL.
Tibby

colinicky · 18th January 2008, 19:41

Quote: (Originally Posted by Icarusflies)

Thanks about the replays.

So if i understand well, OTS are a better solution if we let aside fashion and comfort.

Steve

IIRC AP went the OTS route because they said it was the only way to meet WOB requirements for CE approval ,then along came Boris with bmcl & CE approval .
Personally I dive a Vision with bmcl & have noticed no difference in WOB compared to the OTS .

Mark Chase · 18th January 2008, 19:43

Front mounted counterlungs offer MUCH better flood tolerance than rear counterlungs and they also offer slightly better work of breathing in flat trim and a lot better work of breathing in several other angles.

Front lungs make for simple 02 and diluent addition and also make for easy dumping of gas via the OPV

Front lungs allow for easy off board gas addition.

Front mounted lungs also keep you warm

Rear lungs allowed a clear frontal area which is worth its weight in hassle to those that prefer it (like me)

They allow for simple kitting up

Easy management of stages and other dive equipment.

They are protected from puncture damage when crawling through a wreck

They look great

ATB

Mark

decoweenie · 18th January 2008, 20:11

Quote: (Originally Posted by tibby)

...Back mounted CLs are usually more protected by some rigid housing which may prevent this...

Rigid housing not needed.

BMCL, depending on which system, will sit between you and the wing - or the unit and the wing - so plenty of protection.

18th January 2008, 13:32	#1 (permalink)
Icarusflies New Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Feb 2007 Location: Miami Posts: 52	front cunterlungs Hello All; I am new in this world, still haven't chosen my rebreather but I was wondering what are the advantages of front mounted cunterlung vs back mounted lungs? Thanks; Steve
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18th January 2008, 13:38	#2 (permalink)
Sutty Classic Kiss diver Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Jun 2005 Location: Glossop, Derbyshire, UK Posts: 763	Re: front cunterlungs There's a "O" in "counterlung"! My mind boggles at your version! __________________ Never forget that life is a finite resource.
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18th January 2008, 13:52	#3 (permalink)
Icarusflies New Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Feb 2007 Location: Miami Posts: 52	Re: front cunterlungs jeez...thank you...any more comments about the post? Thanks; Steve
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18th January 2008, 14:14	#4 (permalink)
nigelh New Member Current Rebreather/s: Inspiration Vision Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Mar 2005 Location: Brighton, Sussex, UK Posts: 787	Re: front cunterlungs Quote: (Originally Posted by Icarusflies) I am new in this world, still haven't chosen my rebreather but I was wondering what are the advantages of front mounted cunterlung vs back mounted lungs? The over the shoulder counterlungs are thought to be the choice for Work-of-Breathing but whether this is true and how important WOB is is a matter we debate. To some people the 'clear chest' is important, to others access to the injectors. I can't really comment. I like my Inspo with OTS but I haven't dived much else other than my Russian IDA. I notice a lot of current military units are OTS but they have the money and aren't fashion conscious like us kids. I suspect that if there was a definitive 'must have' all rebreathers would be like that and they aren't. __________________ nigelh
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18th January 2008, 18:18	#5 (permalink)
Lake_Tahoe_Diver Enjoying the silence Current Rebreather/s: Prism Topaz Sport Kiss Other Rebreather/s: Not Bought Yet Join Date: Feb 2006 Location: Reno, Nv. (Lake Tahoe) Posts: 184	Re: front cunterlungs Depending on the unit OTS counterlungs act as a watertrap that can be drained while underwater if the need should present itself. You never know when your dive bubby does something a little silly and the next thing you know you are laughing and spit the DSV out (opps, only happend once) __________________ Scuba Diving,the only sport where it is good to be in over your head....
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18th January 2008, 18:33	#6 (permalink)
Icarusflies New Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Feb 2007 Location: Miami Posts: 52	Re: front cunterlungs Thanks about the replays. So if i understand well, OTS are a better solution if we let aside fashion and comfort. Steve
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18th January 2008, 18:46	#7 (permalink)
tibby untitled Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: May 2007 Location: Salt Lake City, UT Posts: 327	Re: front cunterlungs One other downside is if you are into tight squeeze diving (wrecks especially) OTS CLs increase the chances of tear and unwanted CL volume reduction if squeezed by the restriction. Back mounted CLs are usually more protected by some rigid housing which may prevent this. Also, the "T" pieces shorten the corrugated hoses thus limiting your side-to-side head movement slightly more than with BMCL. Tibby __________________ Does the voice of reason change when you add helium to the mix?...hmm
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18th January 2008, 19:41	#8 (permalink)
colinicky Custom Title Allowed! Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Mar 2005 Location: uk Posts: 650	Re: front cunterlungs Quote: (Originally Posted by Icarusflies) Thanks about the replays. So if i understand well, OTS are a better solution if we let aside fashion and comfort. Steve IIRC AP went the OTS route because they said it was the only way to meet WOB requirements for CE approval ,then along came Boris with bmcl & CE approval . Personally I dive a Vision with bmcl & have noticed no difference in WOB compared to the OTS . __________________ Colin I trust my rebreather completely , I just don't trust the user onwards & downwards
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18th January 2008, 19:43	#9 (permalink)
Mark Chase I go down for ages Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Jan 2005 Location: Kent Posts: 2,418	Re: front cunterlungs Front mounted counterlungs offer MUCH better flood tolerance than rear counterlungs and they also offer slightly better work of breathing in flat trim and a lot better work of breathing in several other angles. Front lungs make for simple 02 and diluent addition and also make for easy dumping of gas via the OPV Front lungs allow for easy off board gas addition. Front mounted lungs also keep you warm Rear lungs allowed a clear frontal area which is worth its weight in hassle to those that prefer it (like me) They allow for simple kitting up Easy management of stages and other dive equipment. They are protected from puncture damage when crawling through a wreck They look great ATB Mark __________________ Is it supposed to make that noise ? I took my unit to the dive shop and demanded they bolt on every thing that would fit. Join my elite diving teem and get a Tshirt "Doing It Chasey"Hammerhead Eccr Advanced Diving System
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18th January 2008, 20:11	#10 (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: front cunterlungs Quote: (Originally Posted by tibby) ...Back mounted CLs are usually more protected by some rigid housing which may prevent this... Rigid housing not needed. BMCL, depending on which system, will sit between you and the wing - or the unit and the wing - so plenty of protection.
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