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Mark Chase · 11th December 2007, 16:08

Quote: (Originally Posted by athomson)

Hi all,

I'm heading towards my Mod 2 at the moment and am starting to think about my kit configuration some more with regards to it. I'm also thinking its Christmas time and the family are asking what to get me (yippee, more dive gear, here I come).

Currently I dive a Inspiration Vision. When I'm doing something long or deepish, I add a Ali 7ltr or two (depending on the exact dive requirements) - I own one and borrow the second when needed.

Anyway, as I mentioned, I am doing my Mod 2 in the new year in Malin Head in Ireland and am trying to decide is it time to ditch the sevens and head for side slung tens, or should I stick with what I have and buy another seven.

Doing the numbers with V-planner for spending 20 minutes at 60m, the twin sevens should just about get me out of the water but there won't be much in the way of gas left?

Anyone got any opinions?

Any dive with a bailout planned 90mins of deco i take two 7s allowing a 30SAC for the deep mix. For my diving that gets me down to 50ish m.

After that I am on a steel 10 with 18/45 in (it floats) and an Ali 80 with 50% in. Past 120min run I add a drop tank of 80% on the boat and cut some very very agresive (just in case i dont get the drop tank) tables.

I tried two steel 10s and I couldn't trim out because the 18/45 floats and the 50 sinks like a large rock. The Ali 80 with 50% in is about 1.5kg neg with a 230bar fill. The Steel 10 of 18/45 is almost neutral + the first stage

To get an Ali 80 to float the same as the 10 you have to run it at around 160bar of 50%. Thats useless for the dives i do.

I chose to run the steel 10 for the deep mix because it tolerates over blowing a lot better than the ali. My steel 10 is always at at least 250bar. You can never have too much gas

PS: I forgot to mention a steel 10 empty is neutrol so it dosent make you boyent. An ali 80 empty is very very floaty so if your emptying your deep tin and then emptying your shalow tin and they are both 2Kg+ positive,, watch out.

The DIR boys aparently send the empties up the line rather than try and carry floaty tanks.

ATB

Mark

11th December 2007, 16:08	#8 (permalink)
Mark Chase I go down for ages Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Jan 2005 Location: Kent Posts: 2,699	Re: Bailout Cylinder Sizes Quote: (Originally Posted by athomson) Hi all, I'm heading towards my Mod 2 at the moment and am starting to think about my kit configuration some more with regards to it. I'm also thinking its Christmas time and the family are asking what to get me (yippee, more dive gear, here I come). Currently I dive a Inspiration Vision. When I'm doing something long or deepish, I add a Ali 7ltr or two (depending on the exact dive requirements) - I own one and borrow the second when needed. Anyway, as I mentioned, I am doing my Mod 2 in the new year in Malin Head in Ireland and am trying to decide is it time to ditch the sevens and head for side slung tens, or should I stick with what I have and buy another seven. Doing the numbers with V-planner for spending 20 minutes at 60m, the twin sevens should just about get me out of the water but there won't be much in the way of gas left? Anyone got any opinions? Any dive with a bailout planned 90mins of deco i take two 7s allowing a 30SAC for the deep mix. For my diving that gets me down to 50ish m. After that I am on a steel 10 with 18/45 in (it floats) and an Ali 80 with 50% in. Past 120min run I add a drop tank of 80% on the boat and cut some very very agresive (just in case i dont get the drop tank) tables. I tried two steel 10s and I couldn't trim out because the 18/45 floats and the 50 sinks like a large rock. The Ali 80 with 50% in is about 1.5kg neg with a 230bar fill. The Steel 10 of 18/45 is almost neutral + the first stage To get an Ali 80 to float the same as the 10 you have to run it at around 160bar of 50%. Thats useless for the dives i do. I chose to run the steel 10 for the deep mix because it tolerates over blowing a lot better than the ali. My steel 10 is always at at least 250bar. You can never have too much gas PS: I forgot to mention a steel 10 empty is neutrol so it dosent make you boyent. An ali 80 empty is very very floaty so if your emptying your deep tin and then emptying your shalow tin and they are both 2Kg+ positive,, watch out. The DIR boys aparently send the empties up the line rather than try and carry floaty tanks. ATB Mark __________________ Is it supposed to make that noise ? I took my unit to the dive shop and demanded they bolt on every thing that would fit. Join my elite diving teem and get a Tshirt "Doing It Chasey"Hammerhead Eccr Advanced Diving System Last edited by Mark Chase : 11th December 2007 at 16:47.
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