WOB - Opinions please

Marin

I am looking into making the transition into a bubble free world and after spending a long time trawling through posts on Rebreather World and having had a good look at all of the options at Dive 2007 in Birmingham this last weekend I really like the look and the thought process behind the rEvo.

That said, the current debate that is raging elsewhere on Rebreather World suggests that the rEvo WOB leaves a little to be desired. Paul has rigourously defended his baby (as any Father would) but I was wondering how you guys compare it with other units that you have dived.

Please note that I am not being antagonistic as I have a genuine interest in this unit, I am merely looking for informed feedback.

J. V.

I use a rEvo since years and can compare with some other breathers.
In normal position of dive, I've found rEvo's WOB better than Kiss, a little better than Inspi, more or less egal to Meg.
I use 4-8 mesh sorb and trimix with hight fHe or heliox as diluant since 40 meter (sometime before).
The rEvo have a back counterlungs design, like Kiss, that make WOB changing with diver position. If you dive uspside down, rEvo or Kiss have more WOB than if you dive horizontal. Changing WOB don't means excessiv WOB, that just means changing.

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Jacques
NPSFQQA-EDS IT # 007
(remué non agité)

RichClark

Hi Martin,

I would drop Dave Cooper [Decodiver] a PM. You'll find many happy rEvo divers I'm sure, but not that many that will have extensive experience on other units to make a direct comparision with.

Dave is a top instructor and active diver that happens to have about 5 different rebreathers, including an rEvo. As far as I know he thinks its a cracking unit.

Cheers

Rich

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Stephane

Yes, very good idea, ask Dave.

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Stéphane

paulraymaekers

there are several other parameters that must be looked at when buying a breather: all things that have not been pointed at yet:

ease of setup, before and after dive, easy maintenance, reliability (does a unit has to go back to the factory for check-up, small repairs, yearly maintenance), upgradebility (at what price), availability of spare-parts, response speed of the manufacurer, % of missed dives due to unit malfunctioning, possibilities to continue a dive-trip with a small problem, simplicity (to take the correct messures in a difficult situation), and so many others...

paul

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jradomski

Having dived multiple units.. in the proper dive positions, I feel the rEvo breaths better than either the classic or sport kiss and optima, and a little worse than the inspiration or meg..

In the upright position the rEvo and Sport Kiiss unit breath like pigs, the classic is a bit better, the o2ptima a bit better but all worse than insp or meg..

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Joe Radomski
CCR Trimix Instructor Trainer
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All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated.

brinoz

Hi,

I used to dive with a EDO08 for 1.5 year.
Now I have a rEvo, WOB is much better.
Personnaly, at normal breathing rate, it is not harder to breath than OC.

Bruno

brinoz

This is really a strong point to the rEvo.
In september I went for the first time to dive in mediterannee from a Zodiac with my rebreather. All the other divers were OC.
I was a little bit puzzle how it would go.

In fact I was all set up, ready to dive, well before the OC divers.
On the Zodiac, no problem, the equipment is well designed, it fits perfectly, you do not loose time to put it.
After dive, ready to drink also before the other divers

ok, if you have to change the sorb, then you need to take 10 minutes to do it.

Regards
Bruno

J. V.

You can buy spare(s) cassette(s), prepare it before the dive, store it in a Tupperware, and change the sorb take only seconds.

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Jacques
NPSFQQA-EDS IT # 007
(remué non agité)

Demosthenes

All Paul needs to do is change his crummy Drager hoses and the DSV and he would get a substantial improvment. The rest of the unit is quality why oh why does he have those things on there.WOB 101 - Use big bore hoses dont have sharp changes of gas direction.Mark my words - there will be an upgrade path soon and substantially improved WOB.The rEvo is a pretty damn good unit but with a little tweaking it would be awsome - didnt Mr G do Paul and the industry a favour with this free testing!