Inverted twins

[Dr Stevil]

OK, got me two metre hose so can have a bash at inverting now, I think the octo hose will do for backup reg, not sure yet, but what about the BC feed? the hose I've got is only 0.75 metres so it won't fit over the top of the rig, did/do you guys put the BC inflator under the arm?
Chee-az
steve

[Hobby]

Yep.It sould still have enough length to come under your arm(passed beneath your harness'shoulder strap to keep it out of the way)and fix to the valve without pulling.
HTH,Hobby.

[Kev W]

I bought a longer BC hose aswell. suerly bringing it under arm will handicap you when dumping (ie raising hose).
Also I bought a 1.5 mtr hose for my second cyl as I found the standard hose not long enough for backup.

[Hobby]

Good point,my mistake as I only half read it and never using a BCD saw instead 'suit inflation'hose.Disregard the above,try and see if it will work but as Kev says you may have probs if you raise the trunk to dump.Now I'm off back to school...I will read the question,I will read the question,I will read the question........
Hobby.

[Dr Stevil]

I've seen a pic of a tech diver (may have been Jack Ingle) who had his BC inflator (ie not the BC feed) going under his arm and bungeed to his BCD, anyone using that method?

Hobby, I was going to try your suggestion about getting custom hoses made by a local firm, do they supply the scuba type fittings or is it advisable to take your old ones along to be cannabilised (if that is possible)? Will I have to specify the max pressure rating of the hoses
Chee-az
Steve

[And]

Hi

Jack Ingle does indeed use his BC trunk bungied and accessible at his waist. He uses an OMS wing however which has a VERY long trunk and is also equipped with a shoulder dump which he will dump from on the surface. He also does not use the wing for buoyancy. (Or thats what he said in the article in Dive Mag) A picture is available at www.frogkick.nl

Go to DIR vs DIW and then DIW parade. Theres a pic of Jack Ingle from Dive Mag in there. There might be some pics of inverted tanks too.

[DALESDIVER]

Steve,
at the moment I am running with inflator slung underarm, when on O/C , it works well, what bladder are you diving? if you have another means of dumping gas other than the inflator, i.e. a shoulder dump use it! Then you might get away with a short inflate hose, if you want any help locating hoses give me a call as we can get any made to any length...
Andy

[Dr Stevil]

Cheers for the URL WL, it was indeed that very same pic I saw in an issue of Dive, I've just gotten my dutch colleague to translate some of it for me, I particularly like "droogpak" for "drysuit", very Clockwork Orange :biggrin:

Hi Andy, it's a rare day when you've got time for posting innit;)  

As it happens I've got an OMS bladder so I think that'd work for the moment as it has a shoulder dump, though I find the OMS dump valves are very slow, but I believe that is meant to be deliberate. I expect I'll be trying this out this weekend, guess Bren may have spoken to you already about this wreck hunt idea so may see you then
chee-az
Steve

[Hobby]

There's some"interesting" pics on that site.I'm curious as to why inverted twins are considered doing it wrong,anyone?
Hobby.

[And]

Hi

From what I've read there are a number of things.

First is customised hoses and a complicated routing, although a DIR rig has customised hose lengths. The only 'standard' length hoses I have are the drysuit hose and BC hose. I don't know about the routing, I can only assume that it may not be possible to hear a leaking hose if they are travelling up the body rather than behind the head.

Secondly they say you need a special stand or something to assemble and put them on. Also the necessary cage things are a tanglement hazard.

They do acknowledge that there may be a benefit when scootering in caves though and they counter this with the proper buoyancy and trim argument. (prevention rather than cure)

I can't rightly remember where I've read it. It may have been the Fundamentals book, I'll let you know.

Kindest Regards

WL

PS There is a website I've seen where a guy who used to be a motorcycle racer uses inverted because he doesn't have the flexibility he used to have.
www.combro.co.uk/nigelh/diver/rig.html
(God, I can't believe how much useless info I have stored in my head sometimes!)