Twins

[Rick Huggins]

<font color='#0000FF'>Using the DIR philosophy, what hoses go on which pillar i.e. primary, main regs, spg, inflators.

The set has isolation.

TIA

[MATTBIN]

This has come up a couple of times, some say one thing others say something else. E.g. left valve feeds 2nd dv and d/s right feeds Primary dv and wing. Some say the opposite i.e. left feed 2dv and wing, rh feed primary dv and d/s.
Have a look at this thread which will also take you to Dom's site, he is quite keen I believe on the DIR view, although he would be the first to say he's not DIR. You may also be influenced by which hoses fit, unless yo go to custom lengths.

HTH
Matt
Twin setup.

[peter k]

Left post- Back-up reg, spg + wing inflator
Right post- Main reg + suit hose.

It's so if you need to shut the manifold and breathe off your back-up you still know how much gas you've got and you've still got the wing for buoancy.

I think!!!
Peter

[Rick Huggins]

<font color='#0000FF'>Cheers chaps

Rick

[Bob Cooper]

Originally Posted by [b

Quote[/b] (peter k @ Feb. 14 2004,17:10)]Left post- Back-up reg, spg + wing inflator
Right post- Main reg + suit hose.

It's so if you need to shut the manifold and breathe off your back-up you still know how much gas you've got and you've still got the wing for buoancy.

I think!!!
Peter

Originally Posted by [b

Quote[/b] ]Left post- Back-up reg, spg + wing inflator
Right post- Main reg + suit hose.

Nearly right...but not quite. &nbsp;Wing inflator needs to be on the right post, together with the long hose. &nbsp;Then the drysuit (if you are using backgas for suit inflation) goes on the left post, together with the backup regulator.
So, in summary:
Right post: long hose and wing inflate.
Left post: backup reg. spg and dry suit inflate.

There is an argument in favour of running the wing off the left post for cold water diving, but it's not the &quot;proper&quot; DIR way.

If you want to know the why's and wherefore's of &quot;what goes where&quot;, I can probably explain (I would need to rack my brains to try to remember!).

Hope this helps anyway.

Bob

[peter k]

Ok Bob if that's the way to DIR then so be it, BUT, what I would say against it is;
Does a suit have enough buoancy to lift a diver with 2/3 stages+assorted crap? You buy a wing that will lift xlb, but you don't buy a suit like that! Having the wing inflator on your LHP means that if the RHP goes down for whatever reason then you know that you've got enough lift from the wing to get you up as opposed to straining the suit.

Just a thought!
Peter

[lawrence]

You can oraly inflate the wing.

[peter k]

Task loading in what is already a stressful situation

Peter

[Bob Cooper]

Originally Posted by [b

Quote[/b] (peter k @ Feb. 14 2004,18:05)]

Originally Posted by [b

Quote[/b] ]Does a suit have enough buoancy to lift a diver with 2/3 stages+assorted crap? You buy a wing that will lift xlb, but you don't buy a suit like that! Having the wing inflator on your LHP means that if the RHP goes down for whatever reason then you know that you've got enough lift from the wing to get you up as opposed to straining the suit.

Fair point Peter, but if you loose the RHP (a likely scenario), you loose your primary buoyancy device (wing), to get the wing back again, you simply plug the suit inflator into the wing and bingo! &nbsp;At this point, you don't need the suit inflator because you are heading up. &nbsp;Also, you can orally inflate the wing. &nbsp;In reality, you don't really need either, until you hit the surface, then you can inflate orally, so if RHP fails, you can just forget it, switch to backup and ascend.

The point about wings and lift is that if the rig is properly balanced in the first place, you only need enough lift to offset the weight of gas in the tanks when they are full (about 6-7 kg?). &nbsp;Where you need a wing with 20kg (or whatever) of lift is just to float you comfortably on the surface before and after the dive, to float your gear if you need to remove it and for rescue (i.e. to lift two divers with full tanks etc.)

DIR is more about the sum of all the parts rather than just &quot;what goes where&quot;. &nbsp;If one part is missing, then it doesn't work and it isn't &quot;right&quot;. &nbsp;A diver who is properly balanced will be able to ascend using fins, suit, SMB or whatever with full tanks and no wing.

Hope this helps - it's good to have some DIR talk back on this forum.

Bob

[peter k]

Originally Posted by [b

Quote[/b] (Bob Cooper @ Feb. 14 2004,18:33)]

Originally Posted by [b

Quote[/b] ]but if you loose the RHP (a likely scenario), you loose your primary buoyancy device (wing), to get the wing back again, you simply plug the suit inflator into the wing and bingo! &nbsp;At this point, you don't need the suit inflator because you are heading up. &nbsp;Also, you can orally inflate the wing. &nbsp;

Okey dokey. Leaving aside the &quot;your going up anyway&quot; bit, lets just imagine for whatever reason you need to use wing, say a casualty lift for example. &nbsp;

So you've lost your RHP which is more likely than losing the LHP, you've got two options to get your primary buoancy back! Orally inflate or disconnect/connect. Isn't it much easier to just have the wing connected to the LHP in the first place? You've said the suit inflator is pointless anyway, so why not have that on the now pointless post? It seems to me that there's an extra task being added in the middle of the situation that could have been easily prevented by just having the wing on the LHPO.

You've given ways to remedy the situation that would arise from having it the DIR way round but no real reason (a) why it is that way or (b)why it shouldn't be the other way!

Another thing, surely the hose routing would be easier and neater if both wing and suit hoses were going straight down to the relevant bits as opposed to criss-crossing behind you. Less stress at the 1st stage ports.

Peter