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| View Poll Results: I change diluent during ascent | |||
| every time |    | 4 | 6.06% |
| Never |    | 49 | 74.24% |
| sometimes |    | 13 | 19.70% |
| Voters: 66. You may not vote on this poll | |||
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19th March 2006, 10:57
| #21 (permalink) |
| Despotic Overlord    Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: London, UK
Posts: 3,687
    | Re: Change of diluent? Poll edited for you to put never option in....which gets my vote too
__________________ Bailout and Kit Management account for Murphy's Law The only bad question is one you did not ask and later wish you had. Use of Rebreather World is subject to the Rebreather World Terms & Conditions of Use |
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19th March 2006, 11:00
| #22 (permalink) |
| Silent diver   Current Rebreather/s: Inspiration Classic Inspiration Vision Evolution Megalodon Ouroboros rEvo Other CCR Other Rebreather/s: Inspiration Classic Sport Kiss rEvo Other CCR Join Date: Sep 2005 Location: France Italy
Posts: 393
| Re: Change of diluent? Thanks   Best Aldo
__________________ Aldo Ferrucci Trimix and Rebreather IT Expedition Leader www.bubnotbub.com I like bubbles only in my glass of Champagne |
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19th March 2006, 19:59
| #23 (permalink) |
| WEB MERMEN  Current Rebreather/s: Inspiration Classic Dolphin Home Build Other Rebreather/s: Not Bought Yet Inspiration Vision Evolution Prism Topaz Sport Kiss Classic Kiss Dolphin Home Build Join Date: Feb 2005 Location: Perth Australia
Posts: 386
| Re: Change of diluent? Quote: (Originally Posted by Nick uk.) Aah ok, so it's a logistical decision rather than a technical one? Nick, have you run some plans to see the difference 10/50 to 10/90 makes. Try it for 20 mins at 100m it is worth considering. (I wouldn't use 10/50 for 100m just an example) Also apart from Dr J there aren't that many people diving heliox to tell us what and how they are doing it let alone reliable upto date info on it. Some people not so concerned about counter diffusion isses use a flush as a safety margin more than gaining some time. |
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19th March 2006, 20:41
| #24 (permalink) |
| Made in England.  Current Rebreather/s: Inspiration Classic Azimuth Other Rebreather/s: Azimuth Join Date: Nov 2005 Location: Viale C.Colombo 75 Marina di Carrara. MS 54036 Italy
Posts: 579
| Re: Change of diluent? Quote: (Originally Posted by wizbang) Some people not so concerned about counter diffusion isses use a flush as a safety margin more than gaining some time. I don't understand this bit....where's the safety factor?  Thanks.
__________________ If it aint broke....don't fix it, and if it is.............well......get another one!  divechief2000@hotmail.com |
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19th March 2006, 22:07
| #25 (permalink) |
| WEB MERMEN Current Rebreather/s: Inspiration Classic Dolphin Home Build Other Rebreather/s: Not Bought Yet Inspiration Vision Evolution Prism Topaz Sport Kiss Classic Kiss Dolphin Home Build Join Date: Feb 2005 Location: Perth Australia
Posts: 386
| Re: Change of diluent? Run some plans to check the specific details and get a feel for it but the general overview is: If you do a depish longish dive with a decent amount of He (10/70) then flushing with a gas that is higher in O2 and N2 and lower in He (20/30) will give a decompression time advantage (according to the deco program). Doing the flushing but not using the extra time gained is considered a "safety advantage" If the flush saves you 10mins but you stay for the full time (as if you hadn't flushed) then you are getting an extra 10mins of deco which is considered to be advantageous (to some). |
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19th March 2006, 22:17
| #26 (permalink) |
| Made in England. Current Rebreather/s: Inspiration Classic Azimuth Other Rebreather/s: Azimuth Join Date: Nov 2005 Location: Viale C.Colombo 75 Marina di Carrara. MS 54036 Italy
Posts: 579
| Re: Change of diluent? Quote: (Originally Posted by wizbang) Run some plans to check the specific details and get a feel for it but the general overview is: On my V-Planner if i change dill, it hammers my deco. It treats it as another mini-dive if you like. If you do a depish longish dive with a decent amount of He (10/70) then flushing with a gas that is higher in O2 and N2 and lower in He (20/30) will give a decompression time advantage (according to the deco program). Doing the flushing but not using the extra time gained is considered a "safety advantage" If the flush saves you 10mins but you stay for the full time (as if you hadn't flushed) then you are getting an extra 10mins of deco which is considered to be advantageous (to some). Anyway i'll have a fiddle. What program do you use?
__________________ If it aint broke....don't fix it, and if it is.............well......get another one! divechief2000@hotmail.com |
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19th March 2006, 22:26
| #27 (permalink) |
| WEB MERMEN Current Rebreather/s: Inspiration Classic Dolphin Home Build Other Rebreather/s: Not Bought Yet Inspiration Vision Evolution Prism Topaz Sport Kiss Classic Kiss Dolphin Home Build Join Date: Feb 2005 Location: Perth Australia
Posts: 386
| Re: Change of diluent? Hi Nick, Vplanner is good for me. You need to add it as a flush. I don't have the program here with me but I think if you add it at the dpeth you want to flush at say 50m, for a time period of " - " then you will see the difference. As I said I don't have it here, but I do have a plan: 120m for 20mins on 8/75 as apposed to 120m for 20mins on 8/75 with a flush of 31/40 at 30m should save between 10 and 20mins if I recall correctly. VPMBE +4 SP 1.3 hope that helps. |
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19th March 2006, 22:30
| #28 (permalink) |
| Silent diver Current Rebreather/s: Inspiration Classic Inspiration Vision Evolution Megalodon Ouroboros rEvo Other CCR Other Rebreather/s: Inspiration Classic Sport Kiss rEvo Other CCR Join Date: Sep 2005 Location: France Italy
Posts: 393
| Re: Change of diluent? Deco a 60m (2) Diluent 10/90 0,70 SetPoint, 30m/min discesa. Deco a 100m (3) Diluent 10/90 0,70 SetPoint, 30m/min discesa. Livello 100m 16:39 (20) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Ris a 78m (22) Diluent 10/90 1,30 SetPoint, -10m/min Risal. Stop a 78m 0:48 (23) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 72m 1:00 (24) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 66m 3:00 (27) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 60m 3:00 (30) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 54m 3:00 (33) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 48m 2:00 (35) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 45m 3:00 (38) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 42m 2:00 (40) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 39m 3:00 (43) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 36m 3:00 (46) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 33m 4:00 (50) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 30m 4:00 (54) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 27m 5:00 (59) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 24m 5:00 (64) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 21m 7:00 (71) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 18m 8:00 (79) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 15m 10:00 (89) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 12m 12:00 (101) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 9m 16:00 (117) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 6m 10:00 (127) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 4,5m 57:00 (184) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Superf. (184) Diluent 10/90 -6m/min Risal. Deco a 60m (2) Diluent 10/90 0,70 SetPoint, 30m/min discesa. Deco a 100m (3) Diluent 10/90 0,70 SetPoint, 30m/min discesa. Livello 100m 16:39 (20) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Ris a 78m (22) Diluent 10/90 1,30 SetPoint, -10m/min Risal. Stop a 78m 0:48 (23) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 72m 1:00 (24) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 66m 3:00 (27) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 60m 3:00 (30) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 54m 3:00 (33) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 48m 2:00 (35) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 45m 3:00 (38) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 42m 2:00 (40) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 39m 3:00 (43) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 36m 3:00 (46) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 33m 4:00 (50) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 30m 4:00 (54) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 27m 5:00 (59) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 24m 5:00 (64) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 21m 7:00 (71) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 18m 6:00 (77) Diluent Air 1,30 SetPoint, 9m ead Stop a 15m 7:00 (84) Diluent Air 1,30 SetPoint, 5m ead Stop a 12m 9:00 (93) Diluent Air 1,30 SetPoint, 2m ead Stop a 9m 13:00 (106) Diluent Air 1,30 SetPoint, 0m ead Stop a 6m 8:00 (114) Diluent Air 1,30 SetPoint, 0m ead Stop a 4,5m 53:00 (167) Diluent Air 1,30 SetPoint, 0m ead Superf. (167) Diluent Air -6m/min Risal. Regards Aldo 
__________________ Aldo Ferrucci Trimix and Rebreather IT Expedition Leader www.bubnotbub.com I like bubbles only in my glass of Champagne |
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19th March 2006, 23:34
| #29 (permalink) |
| Made in England. Current Rebreather/s: Inspiration Classic Azimuth Other Rebreather/s: Azimuth Join Date: Nov 2005 Location: Viale C.Colombo 75 Marina di Carrara. MS 54036 Italy
Posts: 579
| Re: Change of diluent? Quote: (Originally Posted by wizbang) Hi Nick, Vplanner is good for me. You need to add it as a flush. It'll give me something to play with tommorow since the weather is crappy at moment... cheers. I don't have the program here with me but I think if you add it at the dpeth you want to flush at say 50m, for a time period of " - " then you will see the difference. As I said I don't have it here, but I do have a plan: 120m for 20mins on 8/75 as apposed to 120m for 20mins on 8/75 with a flush of 31/40 at 30m should save between 10 and 20mins if I recall correctly. VPMBE +4 SP 1.3 hope that helps.
__________________ If it aint broke....don't fix it, and if it is.............well......get another one! divechief2000@hotmail.com |
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19th March 2006, 23:39
| #30 (permalink) |
| Made in England. Current Rebreather/s: Inspiration Classic Azimuth Other Rebreather/s: Azimuth Join Date: Nov 2005 Location: Viale C.Colombo 75 Marina di Carrara. MS 54036 Italy
Posts: 579
| Re: Change of diluent? Quote: (Originally Posted by bubnotbub) Deco a 60m (2) Diluent 10/90 0,70 SetPoint, 30m/min discesa. Thanks Aldo...Deco a 100m (3) Diluent 10/90 0,70 SetPoint, 30m/min discesa. Livello 100m 16:39 (20) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Ris a 78m (22) Diluent 10/90 1,30 SetPoint, -10m/min Risal. Stop a 78m 0:48 (23) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 72m 1:00 (24) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 66m 3:00 (27) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 60m 3:00 (30) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 54m 3:00 (33) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 48m 2:00 (35) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 45m 3:00 (38) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 42m 2:00 (40) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 39m 3:00 (43) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 36m 3:00 (46) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 33m 4:00 (50) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 30m 4:00 (54) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 27m 5:00 (59) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 24m 5:00 (64) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 21m 7:00 (71) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 18m 8:00 (79) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 15m 10:00 (89) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 12m 12:00 (101) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 9m 16:00 (117) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 6m 10:00 (127) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 4,5m 57:00 (184) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Superf. (184) Diluent 10/90 -6m/min Risal. Deco a 60m (2) Diluent 10/90 0,70 SetPoint, 30m/min discesa. Deco a 100m (3) Diluent 10/90 0,70 SetPoint, 30m/min discesa. Livello 100m 16:39 (20) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Ris a 78m (22) Diluent 10/90 1,30 SetPoint, -10m/min Risal. Stop a 78m 0:48 (23) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 72m 1:00 (24) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 66m 3:00 (27) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 60m 3:00 (30) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 54m 3:00 (33) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 48m 2:00 (35) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 45m 3:00 (38) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 42m 2:00 (40) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 39m 3:00 (43) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 36m 3:00 (46) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 33m 4:00 (50) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 30m 4:00 (54) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 27m 5:00 (59) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 24m 5:00 (64) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 21m 7:00 (71) Diluent 10/90 1,30 SetPoint, 0m ead, 3m end Stop a 18m 6:00 (77) Diluent Air 1,30 SetPoint, 9m ead Stop a 15m 7:00 (84) Diluent Air 1,30 SetPoint, 5m ead Stop a 12m 9:00 (93) Diluent Air 1,30 SetPoint, 2m ead Stop a 9m 13:00 (106) Diluent Air 1,30 SetPoint, 0m ead Stop a 6m 8:00 (114) Diluent Air 1,30 SetPoint, 0m ead Stop a 4,5m 53:00 (167) Diluent Air 1,30 SetPoint, 0m ead Superf. (167) Diluent Air -6m/min Risal. Regards Aldo
__________________ If it aint broke....don't fix it, and if it is.............well......get another one! divechief2000@hotmail.com |
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