neoprene counter lungs

mikedive · 10th October 2005, 22:23

Hey guys,
How is the neoprene counterlungs project???? I'm asking because I have interese in this counterlungs.
I was thinking about produce some neoprene counterlung in Brazil because my friend own a wetsuits factory and the labor there is much cheaper than USA, Oz or UK.
I have a sugestion if you guys are already producing the counterlungs: change the OPV (locate on the midlle of the counterlung on Inspirations) to the botton like Optima2 and Meg's. You can drain water from the counterlungs much easier.
Please can you keep me up dated with future developments of the project and if you guys want me checking with my friend in Brazil just send me the specifications of the neoprene ( best tickness and quality) and the dimensions.

Cheers,

Mike
Protec Adv. Training Facility - Mexico

sensor330 · 11th October 2005, 00:09

I maybe interested in a set as well.

Scott

uri · 11th October 2005, 02:01

perhaps someone can explain this to me. Why do counterlungs need CE approval?
Surely the rebreather using them needs to perform in a manner that doesn't affect whatever characteristics are measured in the CE standard but it seems unlikely that the CE standard
measures counterlung performance in any direct manner. WOB yes but do counterlungs affect that per se or is it just where they are mounted?

Having not read the CE standard in a while, i can't remember specifics but I'm struggling to see why it's an issue.

U.

PCDiver · 11th October 2005, 07:37

Progress on the project - I received detailed instructions and photos from Dave. I haven't made it to the neoprene guy yet, since work kept me too busy. I hope to do this on Saturday.

Mike, can you ask Dave for the specifications?

BTW - I just received my hammerhead. I only dove it once on a shallow dive but I really love it!

dave t · 11th October 2005, 08:08

Uri

counterlungs are PPE, any change to the loop from the origional spec invalidates the CE new counterlungs fitted to a CE'd rebreather would mean the breather would have to be re CE'd either in part or in full, im not sure which!

counterlung shape and design will defo affect the WOB

PCDiver · 11th October 2005, 10:17

I have a general question about counter lung size. Why are they so big?? I noticed that the counterlungs on my Inspiraiton (large - too big, but I bought my unit second hand) are hardly inflated underwater. Wouldn't a 3 liter volume each side be more than enough?

uri · 11th October 2005, 12:03

Quote: (Originally Posted by dave t)

Uri

counterlungs are PPE, any change to the loop from the origional spec invalidates the CE new counterlungs fitted to a CE'd rebreather would mean the breather would have to be re CE'd either in part or in full, im not sure which!

counterlung shape and design will defo affect the WOB

Thanks Dave,

makes more sense but

a) they are still a bag whose volume is the same as any other counterlung
b) if they are copies of an original part used in the same position they will perform the same?
c) is it just a WOB test required to CE them?

Rgds

Uri

dave t · 11th October 2005, 13:39

Quote: (Originally Posted by uri)

Thanks Dave,

makes more sense but

a) they are still a bag whose volume is the same as any other counterlung
b) if they are copies of an original part used in the same position they will perform the same?
c) is it just a WOB test required to CE them?

Rgds

Uri

a = no not neccesarily. they could be bigger or smaller, the position on the diver will also dictate where the "gas bubble" will sit so volume and shape makes a difference
b = well they may not be exact copies so they may not perform the same
c = I think its WOB and static lung loading

Deep Thought · 11th October 2005, 14:58

At present I am diving a mini meg with neoprene counterlungs that Leon built for my wife (short little pip), sold my full meg but still retain a set of neoprene counterlungs for both units. I did a water measure of the volume and found that the smaller set is apx. 2 liters -each and the larger set is 3 liters - each. I dive the unit with the 2 liter lungs and have not encountered any deficit in loop volume. However I have spoken to divers using the larger fabric ISC counterlungs, who have crimped the pleats together to minimize expansion and have encountered breather problems in heavy current situations. The thing I like about the neoprene lungs are the low profile size, the drawback is the pin holes in seams or compression on internal fittings has caused holes. The new ISC counterlungs look a heck of a lot more professional and raise the esthetic value, but who gives a wizz about pretty breathers?

diverklondike · 12th October 2005, 12:57

Ok... If we are taking a count I am also very interested. Will be happy to help test and contribute to funding etc..

Dive Safe...

Mark
mark_nix@msn.com

10th October 2005, 22:23	#21 (permalink)
mikedive Custom Title Allowed! Current Rebreather/s: Megalodon Other CCR Other Rebreather/s: Inspiration Classic Optima Other CCR Join Date: Apr 2005 Location: South Brazil, Texas and Mexico Posts: 330	Hey guys, How is the neoprene counterlungs project???? I'm asking because I have interese in this counterlungs. I was thinking about produce some neoprene counterlung in Brazil because my friend own a wetsuits factory and the labor there is much cheaper than USA, Oz or UK. I have a sugestion if you guys are already producing the counterlungs: change the OPV (locate on the midlle of the counterlung on Inspirations) to the botton like Optima2 and Meg's. You can drain water from the counterlungs much easier. Please can you keep me up dated with future developments of the project and if you guys want me checking with my friend in Brazil just send me the specifications of the neoprene ( best tickness and quality) and the dimensions. Cheers, Mike Protec Adv. Training Facility - Mexico
(Offline)

11th October 2005, 00:09	#22 (permalink)
sensor330 Custom Title Allowed! Current Rebreather/s: Megalodon Other Rebreather/s: Not Bought Yet Inspiration Classic Join Date: Feb 2005 Location: Victoria, British Columbia, Canada Posts: 585	I maybe interested in a set as well. Scott
(Offline)

11th October 2005, 02:01	#23 (permalink)
uri Uri Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Apr 2005 Location: Sandhurst UK Posts: 37	CE Issue perhaps someone can explain this to me. Why do counterlungs need CE approval? Surely the rebreather using them needs to perform in a manner that doesn't affect whatever characteristics are measured in the CE standard but it seems unlikely that the CE standard measures counterlung performance in any direct manner. WOB yes but do counterlungs affect that per se or is it just where they are mounted? Having not read the CE standard in a while, i can't remember specifics but I'm struggling to see why it's an issue. U.
(Offline)

11th October 2005, 07:37	#24 (permalink)
PCDiver Submerge Productions Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: Belgium Posts: 969	Progress on the project - I received detailed instructions and photos from Dave. I haven't made it to the neoprene guy yet, since work kept me too busy. I hope to do this on Saturday. Mike, can you ask Dave for the specifications? BTW - I just received my hammerhead. I only dove it once on a shallow dive but I really love it!
(Offline)

11th October 2005, 08:08	#25 (permalink)
dave t Custom Title Allowed! Current Rebreather/s: Inspiration Classic Inspiration Vision Evolution Sport Kiss Classic Kiss Dolphin Ray Azimuth Home Build Other Rebreather/s: Dolphin Ray Azimuth Home Build Join Date: May 2005 Location: UK Posts: 654	Uri counterlungs are PPE, any change to the loop from the origional spec invalidates the CE new counterlungs fitted to a CE'd rebreather would mean the breather would have to be re CE'd either in part or in full, im not sure which! counterlung shape and design will defo affect the WOB
(Online)

11th October 2005, 10:17	#26 (permalink)
PCDiver Submerge Productions Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: Belgium Posts: 969	I have a general question about counter lung size. Why are they so big?? I noticed that the counterlungs on my Inspiraiton (large - too big, but I bought my unit second hand) are hardly inflated underwater. Wouldn't a 3 liter volume each side be more than enough?
(Offline)

11th October 2005, 12:03	#27 (permalink)
uri Uri Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Apr 2005 Location: Sandhurst UK Posts: 37	Quote: (Originally Posted by dave t) Uri counterlungs are PPE, any change to the loop from the origional spec invalidates the CE new counterlungs fitted to a CE'd rebreather would mean the breather would have to be re CE'd either in part or in full, im not sure which! counterlung shape and design will defo affect the WOB Thanks Dave, makes more sense but a) they are still a bag whose volume is the same as any other counterlung b) if they are copies of an original part used in the same position they will perform the same? c) is it just a WOB test required to CE them? Rgds Uri
(Offline)

11th October 2005, 13:39	#28 (permalink)
dave t Custom Title Allowed! Current Rebreather/s: Inspiration Classic Inspiration Vision Evolution Sport Kiss Classic Kiss Dolphin Ray Azimuth Home Build Other Rebreather/s: Dolphin Ray Azimuth Home Build Join Date: May 2005 Location: UK Posts: 654	Quote: (Originally Posted by uri) Thanks Dave, makes more sense but a) they are still a bag whose volume is the same as any other counterlung b) if they are copies of an original part used in the same position they will perform the same? c) is it just a WOB test required to CE them? Rgds Uri a = no not neccesarily. they could be bigger or smaller, the position on the diver will also dictate where the "gas bubble" will sit so volume and shape makes a difference b = well they may not be exact copies so they may not perform the same c = I think its WOB and static lung loading
(Online)

11th October 2005, 14:58	#29 (permalink)
Deep Thought Custom Title Allowed! Current Rebreather/s: Inspiration Vision Classic Kiss Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Megalodon Sport Kiss Classic Kiss Optima Join Date: Apr 2005 Location: Great Lakes Posts: 190	At present I am diving a mini meg with neoprene counterlungs that Leon built for my wife (short little pip), sold my full meg but still retain a set of neoprene counterlungs for both units. I did a water measure of the volume and found that the smaller set is apx. 2 liters -each and the larger set is 3 liters - each. I dive the unit with the 2 liter lungs and have not encountered any deficit in loop volume. However I have spoken to divers using the larger fabric ISC counterlungs, who have crimped the pleats together to minimize expansion and have encountered breather problems in heavy current situations. The thing I like about the neoprene lungs are the low profile size, the drawback is the pin holes in seams or compression on internal fittings has caused holes. The new ISC counterlungs look a heck of a lot more professional and raise the esthetic value, but who gives a wizz about pretty breathers?
(Offline)

12th October 2005, 12:57	#30 (permalink)
diverklondike Just one of the Peasants Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Oct 2005 Location: Delaware, USA Posts: 1,613	Ok... If we are taking a count I am also very interested. Will be happy to help test and contribute to funding etc.. Dive Safe... Mark mark_nix@msn.com
(Offline)

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