Counterlung collapse, what to use to avoid it?

alfa011 · 12th June 2007, 17:19

Hi.

I am working with a design that will use two (2) "around-the-shoulders" 2 liters counterlungs.

I would like to use something inside of each of them to minimize counterlung collapse.

Any ideas of what can be used that also could be obtained easily?

Thanks.

AlMir.

divetheworld · 12th June 2007, 17:21

Spiral hose wrap. The plastic stuff that is used on cables and scuba hoses.
Fix it at the tee peices and further down the lung and it will always maintain a gas path. We used it with great results on some prototype PE lungs.
Is that the kind of thing you meant?

B

alfa011 · 12th June 2007, 17:59

Quote: (Originally Posted by divetheworld)

Spiral hose wrap. The plastic stuff that is used on cables and scuba hoses.
Fix it at the tee peices and further down the lung and it will always maintain a gas path. We used it with great results on some prototype PE lungs.
Is that the kind of thing you meant?

B

Hi "B".

Thanks a lot.. I think you mean the one used in electrical and electronic applications? Yes?

Mmm it sounds promising.. Could you please tell me what is the average diameter of the one you used? (mm?) So I can get the same?

I'll visit today my local Radio Shack to see what they have available.

By the way, I was thinking about the same idea but the closest I have seen is the hose used in vacuum cleaners which has a stiff plastic reinforcement component.

With a knife you can cut it following the spiral using only the reinforcement par and discarding the rest and it would be perfect. Unfortunately I have not been able to find in my local Home Depot (my main source for materials) that kind of hose. But I'll try the one you just have suggested.

Thanks.

AlMir

***caveseeker7*** · 12th June 2007, 19:03

Same sort, maybe larger diameter, used to keep the cables for the KISS display together.
Kids use colored ones on their bicycles (or used to ...

)
Or have a look at the last pic of the Azimuth counterlungs from Dave Sutton's teardown.

alfa011 · 13th June 2007, 21:33

Quote: (Originally Posted by caveseeker7)

Same sort, maybe larger diameter, used to keep the cables for the KISS display together.
Kids use colored ones on their bicycles (or used to ...

)
Or have a look at the last pic of the Azimuth counterlungs from Dave Sutton's teardown.

Hi again.

Went to the local Radio Shack store and saw the 3/8” (9.5mm) spiral cable wrap material but I felt it was not wide enough for my particular application so I was forced to visit the Home Depot store to see what I could devise myself.

Found there a nice 5/8” (15.8mm) black vinyl tubing and bought 10 feet of it and with a drill proceeded to make a lot of holes. It did not come out too bad at all.

I think I am in the right track in the absence of a better alternative.

AlMir

grandizer52 · 13th June 2007, 21:36

might want to consider camelbak hangers you can trim them to fit the lungs
laytah
steve

divetheworld · 13th June 2007, 21:37

Quote: (Originally Posted by alfa011)

Hi "B".

Thanks a lot.. I think you mean the one used in electrical and electronic applications? Yes?

Mmm it sounds promising.. Could you please tell me what is the average diameter of the one you used? (mm?) So I can get the same?

I'll visit today my local Radio Shack to see what they have available.

By the way, I was thinking about the same idea but the closest I have seen is the hose used in vacuum cleaners which has a stiff plastic reinforcement component.

With a knife you can cut it following the spiral using only the reinforcement par and discarding the rest and it would be perfect. Unfortunately I have not been able to find in my local Home Depot (my main source for materials) that kind of hose. But I'll try the one you just have suggested.

Thanks.

AlMir

10-15mm is perfect. What you have will work fine I'm sure.

Brent

narked at 90 · 13th June 2007, 23:11

if you get stuck i have some which is about 20mm diameter that i can send out to you.
kind regards john routley

Philippe GERIN · 14th June 2007, 15:03

Plastic coils as used on key chains work great too.
Best
Philippe

alfa011 · 14th June 2007, 18:59

Quote: (Originally Posted by narked at 90)

if you get stuck i have some which is about 20mm diameter that i can send out to you.
kind regards john routley

Hi John!

If is already perforated I'll gladly take your offer and compensate you for it.

You know, the hard thing is drilling all those holes! And afterwards taking all the flashing that the drilling produces.

Believe me, it is a challenge to patience! But again, it seems it is coming good and I will have it complete in a couple of days. (I only have time for my projects one hour daily in the evenings) Will post the pictures in a couple of days.

AlMir

12th June 2007, 17:19	#1 (permalink)
alfa011 New Member Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Apr 2007 Location: Puerto Rico Posts: 31	Counterlung collapse, what to use to avoid it? Hi. I am working with a design that will use two (2) "around-the-shoulders" 2 liters counterlungs. I would like to use something inside of each of them to minimize counterlung collapse. Any ideas of what can be used that also could be obtained easily? Thanks. AlMir.
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12th June 2007, 17:21	#2 (permalink)
divetheworld Dive porn pimp Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Inspiration Vision Classic Kiss Other CCR Join Date: Mar 2005 Location: Leeds, England Posts: 1,636	Re: Counterlung collapse, what to use to avoid it? Spiral hose wrap. The plastic stuff that is used on cables and scuba hoses. Fix it at the tee peices and further down the lung and it will always maintain a gas path. We used it with great results on some prototype PE lungs. Is that the kind of thing you meant? B __________________ Attitude and self praise is no reccomendation. Dont try to be a great man, just be a man and let history be the judge of you. *WWW.NARKEDAT90.CO.UK* *http://www.grpservices.com/pursuit/* Supporting Shearwater Research Products in Europe
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12th June 2007, 17:59	#3 (permalink)
alfa011 New Member Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Apr 2007 Location: Puerto Rico Posts: 31	Re: Counterlung collapse, what to use to avoid it? Quote: (Originally Posted by divetheworld) Spiral hose wrap. The plastic stuff that is used on cables and scuba hoses. Fix it at the tee peices and further down the lung and it will always maintain a gas path. We used it with great results on some prototype PE lungs. Is that the kind of thing you meant? B Hi "B". Thanks a lot.. I think you mean the one used in electrical and electronic applications? Yes? Mmm it sounds promising.. Could you please tell me what is the average diameter of the one you used? (mm?) So I can get the same? I'll visit today my local Radio Shack to see what they have available. By the way, I was thinking about the same idea but the closest I have seen is the hose used in vacuum cleaners which has a stiff plastic reinforcement component. With a knife you can cut it following the spiral using only the reinforcement par and discarding the rest and it would be perfect. Unfortunately I have not been able to find in my local Home Depot (my main source for materials) that kind of hose. But I'll try the one you just have suggested. Thanks. AlMir
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12th June 2007, 19:03	#4 (permalink)
*caveseeker7* Who loves ya, baby Current Rebreather/s: Sport Kiss Other Rebreather/s: Prism Topaz Join Date: Jan 2005 Location: Too far from Neverland Posts: 5,556	Re: Counterlung collapse, what to use to avoid it? Same sort, maybe larger diameter, used to keep the cables for the KISS display together. Kids use colored ones on their bicycles (or used to ... ) Or have a look at the last pic of the Azimuth counterlungs from Dave Sutton's teardown. __________________ Cheers Stefan "Political Correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.!"
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13th June 2007, 21:36	#6 (permalink)
grandizer52 Sport Kiss & Shearwater Current Rebreather/s: Sport Kiss Other CCR Home Build Other Rebreather/s: Not Bought Yet Sport Kiss Classic Kiss MK 15.X Other CCR Home Build Join Date: May 2006 Location: pearl city hawaii EARTH moving to Iscandar Posts: 254	Re: Counterlung collapse, what to use to avoid it? might want to consider camelbak hangers you can trim them to fit the lungs laytah steve
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13th June 2007, 21:37	#7 (permalink)
divetheworld Dive porn pimp Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Inspiration Vision Classic Kiss Other CCR Join Date: Mar 2005 Location: Leeds, England Posts: 1,636	Re: Counterlung collapse, what to use to avoid it? Quote: (Originally Posted by alfa011) Hi "B". Thanks a lot.. I think you mean the one used in electrical and electronic applications? Yes? Mmm it sounds promising.. Could you please tell me what is the average diameter of the one you used? (mm?) So I can get the same? I'll visit today my local Radio Shack to see what they have available. By the way, I was thinking about the same idea but the closest I have seen is the hose used in vacuum cleaners which has a stiff plastic reinforcement component. With a knife you can cut it following the spiral using only the reinforcement par and discarding the rest and it would be perfect. Unfortunately I have not been able to find in my local Home Depot (my main source for materials) that kind of hose. But I'll try the one you just have suggested. Thanks. AlMir 10-15mm is perfect. What you have will work fine I'm sure. Brent __________________ Attitude and self praise is no reccomendation. Dont try to be a great man, just be a man and let history be the judge of you. *WWW.NARKEDAT90.CO.UK* *http://www.grpservices.com/pursuit/* Supporting Shearwater Research Products in Europe
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13th June 2007, 23:11	#8 (permalink)
narked at 90 John Routley Current Rebreather/s: Inspiration Classic Other CCR Dolphin Home Build Other Rebreather/s: Other CCR Dolphin Home Build Join Date: Feb 2005 Location: middlands uk Posts: 1,074	Re: Counterlung collapse, what to use to avoid it? if you get stuck i have some which is about 20mm diameter that i can send out to you. kind regards john routley __________________ *WWW.NARKEDAT90.CO.UK* *http://www.grpservices.com/pursuit/* Supporting Shearwater Research Products in Europe Narked at 90 Go Military
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14th June 2007, 15:03	#9 (permalink)
Philippe GERIN ccr apprentice Current Rebreather/s: Megalodon Classic Kiss Other Rebreather/s: Join Date: May 2005 Location: Strasbourg, France Posts: 647	Re: Counterlung collapse, what to use to avoid it? Plastic coils as used on key chains work great too. Best Philippe
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14th June 2007, 18:59	#10 (permalink)
alfa011 New Member Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Apr 2007 Location: Puerto Rico Posts: 31	Re: Counterlung collapse, what to use to avoid it? Quote: (Originally Posted by narked at 90) if you get stuck i have some which is about 20mm diameter that i can send out to you. kind regards john routley Hi John! If is already perforated I'll gladly take your offer and compensate you for it. You know, the hard thing is drilling all those holes! And afterwards taking all the flashing that the drilling produces. Believe me, it is a challenge to patience! But again, it seems it is coming good and I will have it complete in a couple of days. (I only have time for my projects one hour daily in the evenings) Will post the pictures in a couple of days. AlMir
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