Excessive counterlung volume on my MEG

lancsman · 16th January 2008, 09:39

Hi

When I did my training the CL where stiched down at the top so they where streamlines for better head movement and view. Any one using their CL with this MOD and how do they work in the long run? Can I sew them up my self or do they need to be resealed after sewing soom how?

Thanks Mark

tibby · 16th January 2008, 13:49

Quote: (Originally Posted by lancsman)

Hi

When I did my training the CL where stiched down at the top so they where streamlines for better head movement and view. Any one using their CL with this MOD and how do they work in the long run? Can I sew them up my self or do they need to be resealed after sewing soom how?

Thanks Mark

Your answer is in this thread.

**Robert Landreth** · 16th January 2008, 14:00

Stitching Meg or SMI CL just make sure not to stitch past the inner seem as you could perforate past the weld seem and have a leak.

scubamartin · 16th January 2008, 18:44

Hello,

So far, the benifits i've read is that a stitched CL creates a better profile and one gets a bit more streamlined. Also, the front of the diver is a bit less clustered. The net result is probably a more confortable setup.

Questions:

Does this mod significantly reduce drag?
Any other functionnal benefits?

Thanks!

**Robert Landreth** · 16th January 2008, 21:14

Quote: (Originally Posted by scubamartin)

Hello,

So far, the benifits i've read is that a stitched CL creates a better profile and one gets a bit more streamlined. Also, the front of the diver is a bit less clustered. The net result is probably a more confortable setup.

Questions:

Does this mod significantly reduce drag?
Any other functionnal benefits?

Thanks!

Having less cluster being streamlined is one part the other is minimizing CL volume and making it closer to your max inhalation volume. Although that said it is not a substitute to practicing and maintaining CL volume to the minimum volume you need at any given breathing rhythm, regardless of total volume. CL are made to fit largest range of people so as to simplify manufacturing, and need to be at least large enough that if the diver needed to work hard and started panting he could get enough gas with out firing his dill valve at every breath, and not run out of Dill during the dive. Even though as we all know breathing hard on a Rebreather is bad practice as we can possibly create problems in the scrubber.

scubadan · 25th January 2008, 00:51

Quote: (Originally Posted by Robert Landreth)

Having less cluster being streamlined is one part the other is minimizing CL volume and making it closer to your max inhalation volume. Although that said it is not a substitute to practicing and maintaining CL volume to the minimum volume you need at any given breathing rhythm, regardless of total volume. CL are made to fit largest range of people so as to simplify manufacturing, and need to be at least large enough that if the diver needed to work hard and started panting he could get enough gas with out firing his dill valve at every breath, and not run out of Dill during the dive. Even though as we all know breathing hard on a Rebreather is bad practice as we can possibly create problems in the scrubber.

I find it pretty easy to keep the volume down to just the "bubble" (the larger part at the top of the lungs). The only time the volume really balloons is on ascent. I simply crush one or both of the lungs during exhale (cross an arm over it) and that keeps the volume to a manageable amount.

**Robert Landreth** · 25th January 2008, 06:24

Quote: (Originally Posted by scubadan)

I find it pretty easy to keep the volume down to just the "bubble" (the larger part at the top of the lungs). The only time the volume really balloons is on ascent. I simply crush one or both of the lungs during exhale (cross an arm over it) and that keeps the volume to a manageable amount.

Some people do it by exhaling through the nose till volume is right. This can make your mask fog up. other people let some gas out the side of there mouth but that also has problems as it can let some water in at the same time. and depending on your configuration could be a problem. I agree ! the best way if you have a sensitive dump valve and front mounted lungs then squeezing the CL is a good way to go.

Mikel-Deko · 25th January 2008, 09:25

Hi
It is someone diving BMCL in the Meg?
Thanks
Mikel

mbelair · 25th January 2008, 11:15

Quote: (Originally Posted by Mikel-Deko)

Hi
It is someone diving BMCL in the Meg?
Thanks
Mikel

May I ask what is BMCL

Dive Africa · 25th January 2008, 11:35

Back Mounted Counter Lung

16th January 2008, 09:39	#31 (permalink)
lancsman New Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Megalodon Not Bought Yet Join Date: Oct 2005 Location: UK, Flitwick Posts: 60	Re: Excessive counterlung volume on my MEG Hi When I did my training the CL where stiched down at the top so they where streamlines for better head movement and view. Any one using their CL with this MOD and how do they work in the long run? Can I sew them up my self or do they need to be resealed after sewing soom how? Thanks Mark
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16th January 2008, 13:49	#32 (permalink)
tibby untitled Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: May 2007 Location: Salt Lake City, UT Posts: 336	Re: Excessive counterlung volume on my MEG Quote: (Originally Posted by lancsman) Hi When I did my training the CL where stiched down at the top so they where streamlines for better head movement and view. Any one using their CL with this MOD and how do they work in the long run? Can I sew them up my self or do they need to be resealed after sewing soom how? Thanks Mark Your answer is in this thread. __________________ Does the voice of reason change when you add helium to the mix?...hmm
(Offline)

16th January 2008, 14:00	#33 (permalink)
Robert Landreth Supporting Member Current Rebreather/s: Prism Topaz Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Jun 2005 Location: CA USA/ Spain Posts: 38	Re: Excessive counterlung volume on my MEG Stitching Meg or SMI CL just make sure not to stitch past the inner seem as you could perforate past the weld seem and have a leak. __________________ If it is broke don't fixit, Bailout!
(Offline)

16th January 2008, 18:44	#34 (permalink)
scubamartin New Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Feb 2006 Location: Montreal Posts: 19	Re: Excessive counterlung volume on my MEG Hello, So far, the benifits i've read is that a stitched CL creates a better profile and one gets a bit more streamlined. Also, the front of the diver is a bit less clustered. The net result is probably a more confortable setup. Questions: Does this mod significantly reduce drag? Any other functionnal benefits? Thanks!
(Offline)

16th January 2008, 21:14	#35 (permalink)
Robert Landreth Supporting Member Current Rebreather/s: Prism Topaz Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Jun 2005 Location: CA USA/ Spain Posts: 38	Re: Excessive counterlung volume on my MEG Quote: (Originally Posted by scubamartin) Hello, So far, the benifits i've read is that a stitched CL creates a better profile and one gets a bit more streamlined. Also, the front of the diver is a bit less clustered. The net result is probably a more confortable setup. Questions: Does this mod significantly reduce drag? Any other functionnal benefits? Thanks! Having less cluster being streamlined is one part the other is minimizing CL volume and making it closer to your max inhalation volume. Although that said it is not a substitute to practicing and maintaining CL volume to the minimum volume you need at any given breathing rhythm, regardless of total volume. CL are made to fit largest range of people so as to simplify manufacturing, and need to be at least large enough that if the diver needed to work hard and started panting he could get enough gas with out firing his dill valve at every breath, and not run out of Dill during the dive. Even though as we all know breathing hard on a Rebreather is bad practice as we can possibly create problems in the scrubber. __________________ If it is broke don't fixit, Bailout!
(Offline)

25th January 2008, 00:51	#36 (permalink)
scubadan New Member Current Rebreather/s: Megalodon Dolphin Other Rebreather/s: Dolphin Join Date: Jun 2006 Location: Richmond, Va Posts: 35	Re: Excessive counterlung volume on my MEG Quote: (Originally Posted by Robert Landreth) Having less cluster being streamlined is one part the other is minimizing CL volume and making it closer to your max inhalation volume. Although that said it is not a substitute to practicing and maintaining CL volume to the minimum volume you need at any given breathing rhythm, regardless of total volume. CL are made to fit largest range of people so as to simplify manufacturing, and need to be at least large enough that if the diver needed to work hard and started panting he could get enough gas with out firing his dill valve at every breath, and not run out of Dill during the dive. Even though as we all know breathing hard on a Rebreather is bad practice as we can possibly create problems in the scrubber. I find it pretty easy to keep the volume down to just the "bubble" (the larger part at the top of the lungs). The only time the volume really balloons is on ascent. I simply crush one or both of the lungs during exhale (cross an arm over it) and that keeps the volume to a manageable amount. __________________ Meg and X1 ... a great combination
(Offline)

25th January 2008, 06:24	#37 (permalink)
Robert Landreth Supporting Member Current Rebreather/s: Prism Topaz Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Jun 2005 Location: CA USA/ Spain Posts: 38	Re: Excessive counterlung volume on my MEG Quote: (Originally Posted by scubadan) I find it pretty easy to keep the volume down to just the "bubble" (the larger part at the top of the lungs). The only time the volume really balloons is on ascent. I simply crush one or both of the lungs during exhale (cross an arm over it) and that keeps the volume to a manageable amount. Some people do it by exhaling through the nose till volume is right. This can make your mask fog up. other people let some gas out the side of there mouth but that also has problems as it can let some water in at the same time. and depending on your configuration could be a problem. I agree ! the best way if you have a sensitive dump valve and front mounted lungs then squeezing the CL is a good way to go. __________________ If it is broke don't fixit, Bailout!
(Offline)

25th January 2008, 09:25	#38 (permalink)
Mikel-Deko Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Other CCR Join Date: Jul 2005 Location: Basque Country -Sp- Posts: 414	Re: Excessive counterlung volume on my MEG Hi It is someone diving BMCL in the Meg? Thanks Mikel __________________ Mikel-Deko Basque Country www.olatu.net "DIR is the nanny state for divers who cannot think on their own" Ron Micjan
(Online)

25th January 2008, 11:15	#39 (permalink)
mbelair New Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Jan 2006 Location: Montreal Posts: 81	Re: Excessive counterlung volume on my MEG Quote: (Originally Posted by Mikel-Deko) Hi It is someone diving BMCL in the Meg? Thanks Mikel May I ask what is BMCL __________________ Marc
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25th January 2008, 11:35	#40 (permalink)
Dive Africa New Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Feb 2007 Location: South Africa Posts: 22	Re: Excessive counterlung volume on my MEG Back Mounted Counter Lung
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