Deco on CCR

[AquaTec]

I just got my insperation, gas is no longer a concern. A bigger scrubber would be nice for cold water diving.

10 hours on a small little O2 bottle...how nice is that

sometime we will use an offboard travel gas [usualy air] if we are doing a very deep dive

 

[caveseeker7]

Congrats, Aquatec, there is an axial scrrubber design in the works that should extend scrubber time. Bob Howell is working on it. Just check his website once in a while http://www.rebreather.org.uk/
His ADV has an excellent rep, and his OC/DSV is the way to go.

Also check in on the Inspiration & VR3 message board at http://www.ccrinfo.com/ it's likely a place where you'll find updates on the development.

Another place to look is http://www.deepbandits.de/ , they build custom parts for the Inspiration as well as a unit called Deep Bandit One which has a scrubber capacity of 3,8kg instead of the standard 2,45kg.
Not sure if it fits the yellow box though, DB uses a frame out of steel on the DB1. I like their metal carrying handle a lot, it's great.

 

[wazza]

madmole once bubbled...
200-300 trimix dives on OC and the money you wasted on gas would have paid for an Inspiration

I believe 40 or 50 trimix dives will do the job not 200-300 dives.
200-300 trimix dives I think u can be a partner in AP Valves.

 

[blackice]

madmole once bubbled...
200-300 trimix dives on OC and the money you wasted on gas would have paid for an Inspiration

This post has made me think that I should look at rebreathers as a possible type of diving to think about.

I had no plans to go down that path.. but was quite aware of the cost of trimix and it does add up very quickly if you like to dive lots.

 

[blackice]

AquaTec once bubbled...
I just got my insperation, gas is no longer a concern. A bigger scrubber would be nice for cold water diving.

10 hours on a small little O2 bottle...how nice is that

sometime we will use an offboard travel gas [usualy air] if we are doing a very deep dive

Do you use helium in your gas mix for deep dives?

 

[flw]

AquaTec once bubbled...
I just got my insperation, gas is no longer a concern. A bigger scrubber would be nice for cold water diving.



I dunno, I thought I might like a bigger scrubber, but I get cold and miserable quicker than the scrubber fails, so its not been an issue so far - if you look at the Hms Russel profiles, they were running 5 hours on the standard scrubbers without issue

10 hours on a small little O2 bottle...how nice is that

sometime we will use an offboard travel gas [usualy air] if we are doing a very deep dive

What do you mean by 'very' deep, curious as we've never used a travel gas, I like using he all the way up ( and down) and unless you are doing somethinge very extreme it's not worth the effort in terms of deco

F

 

[padiscubapro]

blackice once bubbled...


This post has made me think that I should look at rebreathers as a possible type of diving to think about.

I had no plans to go down that path.. but was quite aware of the cost of trimix and it does add up very quickly if you like to dive lots.

Let's use some sample numbers

In the NE US, for a typical 70m dive it runs about $125 per dive for gas

on an inspiration I get about 6 dives per diluent fill (refilling when the bottle is half empty), this runs about $20 or about $7 per dive,
I get 2 dives per scrubber fill,so about $10 per dive, and oxygen I get about 4 dives per fill (about 6 hours of dives, refilled for safety) or about $2.50 per dive... so its 7+10+2.5 or $19.50 per trimix dive

So up here including training it takes 80 dives to break even, thats not really a long time.. also as a bonus bottom times are longer on average.

 

[flw]

padiscubapro once bubbled...


Let's use some sample numbers

In the NE US, for a typical 70m dive it runs about $125 per dive for gas

on an inspiration I get about 6 dives per diluent fill (refilling when the bottle is half empty), this runs about $20 or about $7 per dive,
I get 2 dives per scrubber fill,so about $10 per dive, and oxygen I get about 4 dives per fill (about 6 hours of dives, refilled for safety) or about $2.50 per dive... so its 7+10+2.5 or $19.50 per trimix dive

So up here including training it takes 80 dives to break even, thats not really a long time.. also as a bonus bottom times are longer on average.

I don't think you can work it out like that at all, gas cost stop being a factor in whether or not I choose to do a dive. However, most then start to use a He based diluent on _all_ dives, not just on deeper dives, and will probably work with a lower end than otherwise as well - add to that flexibility on sites, and the advantages of simply running and laminating one set of tables per year..
There are lots of reasons for using a ccr, but gas ,whilst a side benefit shouldn't be one of them.

f

 

[padiscubapro]

flw once bubbled...



I don't think you can work it out like that at all, gas cost stop being a factor in whether or not I choose to do a dive. However, most then start to use a He based diluent on _all_ dives, not just on deeper dives, and will probably work with a lower end than otherwise as well - add to that flexibility on sites, and the advantages of simply running and laminating one set of tables per year..
There are lots of reasons for using a ccr, but gas ,whilst a side benefit shouldn't be one of them.

f

The point was the people who do deep dives rack up a savings fast (so everyone who complains RBs are too expensive, its a crock).. if we are diving deep were aren't doing 1 dive, its usually a string of dives so the diluent is not being wasted.. f you are worried about he/no he just get an extra diluent bottle, they are only $300.. Personally I have He in my mix on every dive..


for people doing nitox diving the cost is about the same except that yuou will always have the best mix, and don't have to waste fills if they werent used and a different dive is planned the following day/week...

 

[BigJetDriver]

I think we are all agreed that gas cost should not be "THE" factor for choosing a particular mix. The very nice thing about a good CCR is that it is like having a gas blend technician strapped to your back. You get the very best blend available for your position in the water column, based on your diluent, of course!

Cost is, nevertheless, "A" factor in our diving. Face it, helium is a darned expensive gas. Another nice value offered by a good CCR is that it conserves your on-board gas SO nicely!