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Thinking of going on to twins. But dont know what would be best twin 10s 232 bar or 12s 232 bar.Would independent regs (one on each cylinder)or a isolator bar be best.Also iam diving on with a Buddy comando TD will it have enough lift..:confused:
Cheers mudpuppy
alexmaclennan
05-11-06, 18:17
Hi mudpuppy,
There are two threads on this very subject on Yorkshire-divers forum right now.
alex
PS Are you registered twice on the site - once as 'mudpuppy' and the other as 'Mud puppy'?
Kent divers are doing 02 cleaned 12 ltr 232 bar twins with manifold and double boot for 248 that is including postage next day delivery with business post, I ordered mine last friday evening and they were delivered before 10am monday morning.
Lizardland
05-11-06, 21:48
I'd go for twin 12's rather than 10's. Twin 10's are a bit short, I get back-ache with them quite badly. They are also really hard to get on and off as well because they are so short, you can't sit down in them properly. There are long 10's made by Heiser (a German company) that are available, but they are harder to find and expensive.
Thinking of going on to twins. But dont know what would be best twin 10s 232 bar or 12s 232 bar.Would independent regs (one on each cylinder)or a isolator bar be best.Also iam diving on with a Buddy comando TD will it have enough lift...
I'd go for twin 12's rather than 10's.
Good thread, guys. :)
Funnily enough, I just got hold of a pair of twinning bands (http://www.apvalves.com/uk/products/accessories/twinkits/) today (were on my birthday list ;)) which I intend to use with my Buddy Commando TD to allow me to rig independent twin 12s. Can't wait to get in the water & get the set up sorted out.
Is there a rule of thumb about how much the weight belt should be altered to compensate for the 2nd tank (I've been using a 3L steel pony recently to complicate the calculation further)? I realise that I'll have to establish neutral buoyancy at the start of the dive and then add weight to compensate for the loss of air in the tanks. By my calculation, that would be about 6kg for 24L @ 230 BAR, does that seem about right?
Good thread, guys. :)
Funnily enough, I just got hold of a pair of twinning bands (http://www.apvalves.com/uk/products/accessories/twinkits/) today (were on my birthday list ;)) which I intend to use with my Buddy Commando TD to allow me to rig independent twin 12s. Can't wait to get in the water & get the set up sorted out.
Is there a rule of thumb about how much the weight belt should be altered to compensate for the 2nd tank (I've been using a 3L steel pony recently to complicate the calculation further)? I realise that I'll have to establish neutral buoyancy at the start of the dive and then add weight to compensate for the loss of air in the tanks. By my calculation, that would be about 6kg for 24L @ 230 BAR, does that seem about right?
Hi charlie When I change setup or setting up somebodys weight for the first time I get into the water with only 10-20 bar in one cylinder and the rest empty (to simulate an ascent where I'm short of air and need to do deco ) and reduce weight till I cant keep my head just under then add 2-3 Lbs.
Cheers, Ding! That's a sensible approach. :)
Lizardland
06-11-06, 15:07
There is a calculator at www.subaqua.co.uk. You can use it to work out the buoyancy of your old and new set ups. That should give an estimate of how much to adjust your weight by.
Be aware, with some twinsets you can need a lot less lead at the end of the dive than you might think as there can be a lot of buoyancy from two empty cylinders rather than just one.
I'd go for twin 12's rather than 10's. Twin 10's are a bit short, I get back-ache with them quite badly. They are also really hard to get on and off as well because they are so short, you can't sit down in them properly. There are long 10's made by Heiser (a German company) that are available, but they are harder to find and expensive.
This is why choosing dive kit is such a pain in the a**e! No-one is the same... I find 12's too long so I can't sit down in them properly... (shortarse you see ;) ) Oh and don't forget you'll need craned into the water like medieval knights weren't craned onto their horses lol I dive a pair of 10/232's and people still whinge about the weight :eek: