4-8 sofnolime in an Inspiration

GrahamP · 8th January 2008, 11:13

Hi all

Sorry if this has already been answered, couldn't find it though. It seems although not advocated by AP, it is possible to use 4-8 mesh sofnolime in the Inspiration. As far as I can gather the implications of doing so are possible slight increase in WOB and more importantly reduction in duration. Are there any other known issues and can anyone quantify the reduction in duration? I think I heard 2 hours instead of 3 hours, but am not sure.

I ask as I'm off to Truk and Palau and am told that there will be 812 (that is aka 797 isn't it?) but just in case, I would like to know if I culd use any 4-8 that may be there.

Many thanks

Graham

jhaaja · 8th January 2008, 11:50

Quote: (Originally Posted by GrahamP)

Hi all

Sorry if this has already been answered, couldn't find it though. It seems although not advocated by AP, it is possible to use 4-8 mesh sofnolime in the Inspiration. As far as I can gather the implications of doing so are possible slight increase in WOB and more importantly reduction in duration. Are there any other known issues and can anyone quantify the reduction in duration? I think I heard 2 hours instead of 3 hours, but am not sure.

I ask as I'm off to Truk and Palau and am told that there will be 812 (that is aka 797 isn't it?) but just in case, I would like to know if I culd use any 4-8 that may be there.

Many thanks

Graham

I would guess that WOB should be lower and also remember seeing figure 2h for duration on full fresh scrubber...

JH

Depth-junkie · 8th January 2008, 22:35

i would just ring AP and ask there advice, i am sure they will tell you if they think its safe to use and if so the duration they would recomend.

ATB
Gareth

Mixaddict · 9th January 2008, 05:37

2 hour duration, higher WOB, more dust.

jhaaja · 9th January 2008, 06:56

Why would the WOB be higher? I would think that it should be lower because the scrubber bed is not so "dense".

JH

tekdiver170 · 11th January 2008, 01:48

I'm not sure of the physics behind it but I did notice a higher WOB when I used 4-8 for the first time last week, did 2.5 hours on it and still had a full temp-stick reading. For a shallow/medium depth dive (30-130') I would feel comfortable pushing it to 3 hours. I regularly dive 8-12 for 4-5 hours (mind you I dive in warm water, although it's been hella cold lately, hovering just above 70 deg F.).

I prefer 8-12 but got 2 buckets of 4-8 free so I can't complain too much.

8th January 2008, 11:13	#1 (permalink)
GrahamP New Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Jan 2006 Location: Iwade, Kent, UK Posts: 19	4-8 sofnolime in an Inspiration Hi all Sorry if this has already been answered, couldn't find it though. It seems although not advocated by AP, it is possible to use 4-8 mesh sofnolime in the Inspiration. As far as I can gather the implications of doing so are possible slight increase in WOB and more importantly reduction in duration. Are there any other known issues and can anyone quantify the reduction in duration? I think I heard 2 hours instead of 3 hours, but am not sure. I ask as I'm off to Truk and Palau and am told that there will be 812 (that is aka 797 isn't it?) but just in case, I would like to know if I culd use any 4-8 that may be there. Many thanks Graham
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8th January 2008, 11:50	#2 (permalink)
jhaaja Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Mar 2005 Location: Finland Posts: 885	Re: 4-8 sofnolime in an Inspiration Quote: (Originally Posted by GrahamP) Hi all Sorry if this has already been answered, couldn't find it though. It seems although not advocated by AP, it is possible to use 4-8 mesh sofnolime in the Inspiration. As far as I can gather the implications of doing so are possible slight increase in WOB and more importantly reduction in duration. Are there any other known issues and can anyone quantify the reduction in duration? I think I heard 2 hours instead of 3 hours, but am not sure. I ask as I'm off to Truk and Palau and am told that there will be 812 (that is aka 797 isn't it?) but just in case, I would like to know if I culd use any 4-8 that may be there. Many thanks Graham I would guess that WOB should be lower and also remember seeing figure 2h for duration on full fresh scrubber... JH
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8th January 2008, 22:35	#3 (permalink)
Depth-junkie 10/52 Psycho Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Aug 2005 Location: Wrexham Posts: 298	Re: 4-8 sofnolime in an Inspiration i would just ring AP and ask there advice, i am sure they will tell you if they think its safe to use and if so the duration they would recomend. ATB Gareth __________________ Alpine low rider of the P.D.D.T Last edited by Depth-junkie : 8th January 2008 at 22:50.
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9th January 2008, 05:37	#4 (permalink)
Mixaddict RBW Member Current Rebreather/s: Inspiration Vision Evolution Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Jan 2006 Location: Draper, Utah USA Posts: 524	Re: 4-8 sofnolime in an Inspiration 2 hour duration, higher WOB, more dust. __________________ Randy Thornton (MixAddict) Inspiration, Evolution, Hammerhead & Sentinel CCR Instructor
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9th January 2008, 06:56	#5 (permalink)
jhaaja Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Mar 2005 Location: Finland Posts: 885	Re: 4-8 sofnolime in an Inspiration Why would the WOB be higher? I would think that it should be lower because the scrubber bed is not so "dense". JH
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11th January 2008, 01:48	#6 (permalink)
tekdiver170 RBW Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Jan 2007 Location: Honolulu, HI Posts: 88	Re: 4-8 sofnolime in an Inspiration I'm not sure of the physics behind it but I did notice a higher WOB when I used 4-8 for the first time last week, did 2.5 hours on it and still had a full temp-stick reading. For a shallow/medium depth dive (30-130') I would feel comfortable pushing it to 3 hours. I regularly dive 8-12 for 4-5 hours (mind you I dive in warm water, although it's been hella cold lately, hovering just above 70 deg F.). I prefer 8-12 but got 2 buckets of 4-8 free so I can't complain too much. __________________ Diving is my therapy... keeps the voices in my head from getting louder. Good thing rebreathers have no bubbles, now I can hear them again. - Chris Liles www.oahuscubadiving.com www.hawaiitechnicaldivers.com
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