OMS or flapping wing!

[ruffy]

Cant get my head around why a wing wrapping around your tanks creating a pinch point when you come into contact with a sharp or even blunt surface could be better and safer than an OMS type wing safely out of the way when empty and using dry suit for buoyancy control!
Been watching DIR dvd!
Easy on me!
Only new diver!

[trakrat]

Originally Posted by ruffy

Cant get my head around why a wing flapping around your tanks creating a pinch point when you come into contact with a sharp or even blunt surface could be better and safer than an OMS type wing safely out of the way when empty and using dry suit for boyancy control!
Been watching DIR dvd!
Easy on me!
Only new diver!

i'm with you i've got the oms and think its great
but the dir guys will tell you it has more chance of snaging on things but hey if i can't snap a rubber bugee cord then i wouldn't be able to lift the thing on to my back
a lot the things they say makes perfect sense but if its not halcyon its not dir
buy what you feel comfortable with your the diving in it

[Sparky750]

I've always wondered the same thing i love my CD TDB bungied wing

[dry suit diver]

me too and chasey posted some pics illustrating the point.


I feel there may be a need for popcorn later on in this thread

[Bantam]

It's two things;

a) you have to remember where DIR evolved - the caves of Florida, where you'd normally dive with a semi-dry on. So your wing is your primary bouyancy. If you have a hole in your wing, the bungee will deflate it faster by pushing the air out.

b) It is an increased snag hazard. All the DIR kit is streamlined to remove all snag hazards.

The thing to remember when analysing the DIR system is what it's being used for - cave and wreck penetration was the overriding factor in the kit design.

I still have the bungee on my OMS wing BTW, just because I think it's neater. But I'm not a DIR diver so it doesn't count (yet).

[trakrat]

yeah you just know its going to get interesting

[Sparky750]

Originally Posted by Bantam

I If you have a hole in your wing, the bungee will deflate it faster by pushing the air out.

Has that actually been tested because surely water pressure acting on the wing would be far greater than anything the bungie does as for the snag hazard i don't buy it surely first stages with hoses or stage bottles pose more of a risk than some 2mm bungie?

[Clare Gledhill]

Originally Posted by Bantam

It's two things;

a) you have to remember where DIR evolved - the caves of Florida, where you'd normally dive with a semi-dry on. So your wing is your primary buoyancy. If you have a hole in your wing, the bungee will deflate it faster by pushing the air out.

b) It is an increased snag hazard. All the DIR kit is streamlined to remove all snag hazards.

The thing to remember when analyzing the DIR system is what it's being used for - cave and wreck penetration was the overriding factor in the kit design.

I still have the bungee on my OMS wing BTW, just because I think it's neater. But I'm not a DIR diver so it doesn't count (yet).

Thank you Bantam - but it's neither of those things. I can't remember when I last saw a DIR diver in Florida in a semi dry suit. We certainly don't permit them on cave courses there as exposures times are too long.

I love the fact that most UK wreck divers feel that they face much harder, tougher on kit, colder etc here than in caves in Florida. Face it, other face reasonably difficult conditions at times - I've holed my drysuit ten times in one trip to Florida when using my legs to stop me being blown out of the cave.

We wouldn't as the original poster suggest use a dry suit for buoyancy. If you do a dive using heavy back gas cylinders and lots of stages you simply cannot support this on a dry suit without becoming very unstable. Those who cry that they do this here already don't understand the meaning of heavy back gas cylinders - fabers are lightweight steels. Even if you can hold enough gas, this amount of gas moving around in your suit would be difficult if you had to go heads down in a wreck or cave.

A good sized wing should not be "flapping" around as you emotively suggest. Mark did post a picture some time back of an inappropriately sized wing. 55lb wings were not designed for Faber tanks and looking at pictures like that tells us why.

Here is a picture of a correctly sized wing - it's not that big a deal is it?



I'm not going to go into it any more than that - but as this is the DIR forum I guess you wanted a DIR answer rather than merely seek to kick off Friday three days early.

[Bantam]

Originally Posted by Sparky750

Has that actually been tested because surely water pressure acting on the wing would be far greater than anything the bungie does as for the snag hazard i don't buy it surely first stages with hoses or stage bottles pose more of a risk than some 2mm bungie?

I didn't say I agreed with the reasoning After all, I still have my bungie firmly on my wing.

However, I also know my OMS is bloody good as I tend to leave it inflated - a sort of positive pressure test - and it stays solid as a rock for weeks sometimes!

[Mal Bridgeman]

Originally Posted by Sparky750

Has that actually been tested because surely water pressure acting on the wing would be far greater than anything the bungie does as for the snag hazard i don't buy it surely first stages with hoses or stage bottles pose more of a risk than some 2mm bungie?

People have suggested this before but only gas below a hole will exit. The gas above the hole can't go down to find the hole unless otherwise assisted .... by bungees for example.

The gas in the wing is at ambient pressure so does not get squeezed out by the water pressure.

Hope that clarifies.
Mal