Apologies - SOS!

[Finless]

SOS = same old stuff!

1. Sideslung deco for trimix dives - on the right side (as standard)?
2. Changing from twin steel 10s to twin steel 12s - about the same amount of lead or lose a bit?

Tks in advance for answers and apologies for lack of .......... the thingy to bother searching through old posts for the info.

[Rob Dobson]

Deco bottles all on the left, but that's coming from the darkside...

Most people (outside of DIR) seem to put the first on the left (say 50%) and the second on the right (100%) - "Left is light, right is rich", but I guess it's one of those things that you go with what makes sense to you.

The difference between 10's and 12's is marginal - assuming both are steel fabers then I'd say maybe 1kg less but best to do a weight check at 50bar and see how you go. I didn't need any lead with 10's and certainly don't with 12's but the difference is A) not much & B) mainly off set by the larger buoyancy change of nearly empty 10's vs nearly empty 12's.

[MATTBIN]

lead difference, what he said above.

I can hold stops on my 12's but I feel a bit more bouyant on my 10's at the same bar. Of course it could also have been that I had more gas in the suit on the 12's as it was in Stoney and my last 10's check was in the Sea. So there's not much variation if you are accurately neutral in your 10's to start off with.

Matt

[Finless]

Originally Posted by Rob Dobson

Deco bottles all on the left, but that's coming from the darkside...

Most people (outside of DIR) seem to put the first on the left (say 50%) and the second on the right (100%) - "Left is light, right is rich", but I guess it's one of those things that you go with what makes sense to you.

The difference between 10's and 12's is marginal - assuming both are steel fabers then I'd say maybe 1kg less but best to do a weight check at 50bar and see how you go. I didn't need any lead with 10's and certainly don't with 12's but the difference is A) not much & B) mainly off set by the larger buoyancy change of nearly empty 10's vs nearly empty 12's.

Rob,

Thanks for the info.

Trimix diving deco cylinder is for future ref but it may affect the way I set my new wing up (I use an FFM with a gas switch). If it was a "hard and fast" rule about which side it went then I would have tried to follow it (for benefit of future buddies).

Am leaping into the local Marina shortly to do a buoyancy/trim check - I'd just like to get it as close as is possible first before I get wet. I'm hoping not to get sea water on my mainly shiny tool kit!

Bryan

[Finless]

Originally Posted by MATTBIN

lead difference, what he said above.

I can hold stops on my 12's but I feel a bit more bouyant on my 10's at the same bar. Of course it could also have been that I had more gas in the suit on the 12's as it was in Stoney and my last 10's check was in the Sea. So there's not much variation if you are accurately neutral in your 10's to start off with.

Matt

Me? Accurately neutrally buoyant!!!!

I prefer to be a bit overweighted so I can leave enough gas in my dry suit at deco to keep warm(er).

[MATTBIN]

Originally Posted by Finless

Me? Accurately neutrally buoyant!!!!

I prefer to be a bit overweighted so I can leave enough gas in my dry suit at deco to keep warm(er).

I'd consider that to be accurately neutral. Oh yeah my 10's have a manifold my 12's dont. You can always drop the metal detector if you think you are too overweighted.

[Finless]

Originally Posted by MATTBIN

You can always drop the metal detector if you think you are too overweighted.

WTF are you talking about Matt! ! Metal detector = which makes Finless .

[nigelH]

Originally Posted by Finless

1. Sideslung deco for trimix dives - on the right side (as standard)?

Rich on the right. Rig it so you can use it blind. I would not carry both on the same side - it's a formula for finning round in circles.

2. Changing from twin steel 10s to twin steel 12s - about the same amount of lead or lose a bit?

'bout the same, might even be more. You gain 4L of displacement but maybe not 4Kgs of metal.

[Finless]

Originally Posted by nigelH

Rich on the right. Rig it so you can use it blind. I would not carry both on the same side - it's a formula for finning round in circles.'bout the same, might even be more. You gain 4L of displacement but maybe not 4Kgs of metal.

I am undecided about whether to go for a full trimix course and whether using a FFM is a good idea or not. In the config I have envisaged in my mind the deco gas is the one not yet connected via the gas switch.

Tks for the weight info. It'll be my first time with a SSBP and "proper" wing - I will be adjusting weights in relation to this change on a direct weight for weight basis. I.e. new wing/SSBP is 2 kgs heavier then I will lose 2kgs off my weights.

[MATTBIN]

I'm assuming you mean lose it off your weightbelt or harness, if the new ssbp is heavier than your old one then the c of g will move up towards your head too, if you then move weight off your belt you will make the trim worse still.
You might need ankle weights or a weight mounted low between the tanks (is that a P weight), fortunately I dont need either.

Matt