Twinset Weight

[Gareth Burrows]

Righto then, I have a twinset.

Next silly question

I am moving from steel faber 15 and 3ltr steel faber pony to twin faber 12's.

I am well aware that this is a "piece of string" question, but does anyone have a rougfh guess as to how much of the 10kg weight to remove from my weightbelt. I know I'll have to sort this out in the pool over the next few weeks, but enough of an estimate to avoid me going through the bottom of the pool on thursday evening and having airhog and dominic laughing their heads off at me would be great

Cheers

[beanie]

10kg?

start low and work up then work back down again

[Dominic]

As if we'd do such a thing

http://diveweb.oneandoneis2.com/cylbuoy.xls

[Mark]

It depends on a couple of things.

Are you using a s/steel backplate?

What type of drysuit & undersuit are you using?

I would start with 30-50BAR in the tanks and no weight belt in fresh water and see how you go. You will not need any additional weight with full tanks but you may be a bit too light when the tanks are empty (depending on your suit).

A bouyancy check is required.

Regards,

Mark.

Originally Posted by Garf

Righto then, I have a twinset.

Next silly question

I am moving from steel faber 15 and 3ltr steel faber pony to twin faber 12's.

I am well aware that this is a "piece of string" question, but does anyone have a rougfh guess as to how much of the 10kg weight to remove from my weightbelt. I know I'll have to sort this out in the pool over the next few weeks, but enough of an estimate to avoid me going through the bottom of the pool on thursday evening and having airhog and dominic laughing their heads off at me would be great

Cheers

[tom]

Gareth, a buoyancy check is obviously the way to go, but I found I dropped about 2-3kg when I made the same switch as you.

[wilbo]

Originally Posted by Garf

Righto then, I have a twinset.

Next silly question

I am moving from steel faber 15 and 3ltr steel faber pony to twin faber 12's.

I am well aware that this is a "piece of string" question, but does anyone have a rougfh guess as to how much of the 10kg weight to remove from my weightbelt. I know I'll have to sort this out in the pool over the next few weeks, but enough of an estimate to avoid me going through the bottom of the pool on thursday evening and having airhog and dominic laughing their heads off at me would be great

Cheers

As others have said, run twinset down to 30ish bar. You should be able to stay neutral and hold your position at the shallowist safety stop comfortably - imperretive when you start deco.

I dive: 5kg V weights. then in fresh water I have a weight belt with 4kgs on it. In the sea I add 2 kgs. I dive a membrane suit with a 200g undersuit. I am reasonably neutral in the water in my skinnies. I'm 6'2'' and 15 stones.

HTH?

[Narked@50]

Just done this without a backplate and I actualy had to add a kilo?

A backplate can be 3 to 6 kg by some of the ones I looked at.

James

[Gareth Burrows]

Neither my backplate or wing have changed. the only difference in my rig is

2 X 12 Ltr 232 rather than a !5 Ltr and 3Ltr

everything else is identical, so I would have thought it was a fairly simple calculation if the weight of the air and metal are known. Now I'm more confused than ever

[Dominic]

Plug the respective weights into the buoyancy calculator linked above and see what it says.

Obviously, the weight of the manifold & cylinder bands aren't taken into account, but it'll give you a rough idea..