Dual vs Single bladder wings

[David Wallace]

Originally Posted by Fiona

(picked up my H. suit inflation bottle the other day)

excellent!

[Mal Bridgeman]

Originally Posted by Lou

You ponce.


Since when did you need a suit inflation bottle? Just coz it is all cool and GUE-stamped ok....I dunno. I remember the day when the only reason folk had one of those was to avoid the higher thermal conductivity effect of He in their backgas. them were the days....

You are clearly scared of what the future holds for you but I have a feeling this bravado will crumble....

Think "I would rather stick pins in my eyes than dive in a puddle"

Mal

[TerryH]

Back on topic.

Ok you are going to think this is dumb, but here we have a situation where
the diver has lost wing bouyancy and hasnt got ditchable weight.

He overinflates drysuit only for it to vent via the neck seal.
Depending on circumstances why not do what we try and avoid.

That is to invert and send the air to our feet? Ok it's a feet first ascent,
but at least you are on the surface.

Not saying that this is the right option, just saying to file it away
somewhere as a last resort.

[Garf]

Originally Posted by TerryH

Back on topic.

Ok you are going to think this is dumb, but here we have a situation where
the diver has lost wing bouyancy and hasnt got ditchable weight.

He overinflates drysuit only for it to vent via the neck seal.
Depending on circumstances why not do what we try and avoid.

That is to invert and send the air to our feet? Ok it's a feet first ascent,
but at least you are on the surface.

Not saying that this is the right option, just saying to file it away
somewhere as a last resort.

well, whilst we're being open minded, I reckon I could close off my suit dump valve and get a LOT of gas into the arms and legs of my suit if i was lying on my back rather than vertical in the water.

If we're talking about ALL options, you could always just think "ahh bolox" as you descended to the bottom, breathed down some of the gas and then ascended again. you're only going to get lighter as you breathe down the cylinder. If you can't float using a drysuit with only a little bit of gas in the cylinder(s) then you really do have a weighting issue in which case......

you have a problem and it's becoming life threatening. Cut the rig off yourself.

[Scubee]

At the time, i was vertical at the surface - looking for an errant buddy IIRC. TBH, I never thought about whether the air was in my torso or my legs, so never thought about shifting it around a bit. i simply thought bugger. Which is odd, as normally I do think through a problem.

Thanks - that has given me something more positive to think about... back to the drawing board so i can see exactly what the problem is/was

[pieater]

Originally Posted by Garf

you have a problem and it's becoming life threatening. Cut the rig off yourself.

How very, very true. That'd be my "it's this or death" plan as well, but first I'd have used my blob to help the situation and also used a lift bag if I'd taken one. I've got a 6 foot H DSMB that I reckon would provide quite a lot of additional lift at the surface - probably more than my 40lb evolve. Maybe this is a tick in the box for closed circuit inflation systems.

[TerryH]

Originally Posted by pieater

How very, very true. That'd be my "it's this or death" plan as well, but first I'd have used my blob to help the situation and also used a lift bag if I'd taken one. I've got a 6 foot H DSMB that I reckon would provide quite a lot of additional lift at the surface - probably more than my 40lb evolve. Maybe this is a tick in the box for closed circuit inflation systems.

Like that sound of that.

So without even seeing a version, I'm presuming here we have a small
independent bladder. Nowhere near the lift of a wing, just enough to
start a lift or aid a drysuit. Crack open a small bottle as per mini one off
a DSMBi and instant lift.

Before the groans of buddy suicide bottles, this would be independent of
main bladder and only enough lift that even if full, wouldnt cause a rapid
in the same way as a full wing/BC.

Tricky bit is working out what is the right lift.

[Garf]

Originally Posted by TerryH

Like that sound of that.

So without even seeing a version, I'm presuming here we have a small
independent bladder. Nowhere near the lift of a wing, just enough to
start a lift or aid a drysuit. Crack open a small bottle as per mini one off
a DSMBi and instant lift.

Before the groans of buddy suicide bottles, this would be independent of
main bladder and only enough lift that even if full, wouldnt cause a rapid
in the same way as a full wing/BC.

Tricky bit is working out what is the right lift.

The BLOB he is talking about is Closed circuit, not self inflating. They are enormous, but require inflating either orally or using a Halcyon-compatible drysuit inflator hose. OBviously not an issue for us clones, becuase we change the nipples on all the kit so everything is interchangeable, but worth bearing in mind that you'd have to disconnect the drysuit - which at this point is the ONLY source of buoyancy you have.

[pieater]

Originally Posted by Garf

The BLOB he is talking about is Closed circuit, not self inflating. They are enormous, but require inflating either orally or using a Halcyon-compatible drysuit inflator hose.

They are enormous, much too big to comfortably orally inflate I reckon. I've got the 1M one and that I can inflate with 1 breath. It takes 8 breaths to inflate the big one.

Originally Posted by Garf

OBviously not an issue for us clones, becuase we change the nipples on all the kit so everything is interchangeable, but worth bearing in mind that you'd have to disconnect the drysuit - which at this point is the ONLY source of buoyancy you have.

No, I would disconnect the hose from the wing inflate, which ain't that hard to do.

[Garf]

Originally Posted by pieater

They are enormous, much too big to comfortably orally inflate I reckon. I've got the 1M one and that I can inflate with 1 breath. It takes 8 breaths to inflate the big one.




No, I would disconnect the hose from the wing inflate, which ain't that hard to do.

Now that's sounding like a better and better idea.