Why can my stab only take twin 10s?

[Iestyn]

<font color='#000080'>I just don't understand why on the label it is rated to a maximum of twin tens, surely if I had twin twelves I would be using less weight so the stab would actually be lifting the same amount. I know I must be missing something here as if it could cope with twin twelves mares would be happy to advertise this but still, I'd like to know what I've misunderstood.

Thanks, Iestyn.

[Narked@50]

The manufacturer has got to draw the line somewhere? Your BC is probably not meant as a tech item but can handle a bit. It is probably not the weight (i.e. alley v steel), but could simply be the cam bands limitations or the internal size of the back plate (or equivalent) making twin twelves too wide and so imbalancing it? The only way to realy know is ask the manufacturer but I doubt you'll get a reply any more help than this one?

James &nbsp;

[daz]

Originally Posted by [b

Quote[/b] (Iestyn @ April 16 2004,02:02)]I just don't understand why on the label it is rated to a maximum of twin tens, surely if I had twin twelves I would be using less weight so the stab would actually be lifting the same amount. I know I must be missing something here as if it could cope with twin twelves mares would be happy to advertise this but still, I'd like to know what I've misunderstood.

Thanks, Iestyn.

I think like James says, they have to draw the line somewhere.

Why do you think the weight would be the same?

Twin 12's would weigh more than twin 10's (including the weight of the air) unless you had a very heavy set of 10's

I would also hazard a guess the amount of extra weight required on the belt/integrated in the jacket would be pretty similar between 10's and 12's. &nbsp;

Actually in water, the weight or lift required should be pretty much the same but the jacket also has to be able to securely support the setup while you are walking to the water.

Daz

[Mark Chase]

The weight of the tanks does not directly impact on the lead carried. The greater displacement of water of the larger twin 12s when empty will require the properly weighted diver to carry more lead to stay down at 6m than empty twin 10s. Add to that the fact tat the full twin 12s are going to be heavier than the full twin 10s and you will find the additional weight diferance. It may even be that the bac plate mounting can not cope with the weight of the twin 12 rig ourt of the water.

Just a thaught



Mark Chase

[Diving Dude]

Iestyn, our the recent easter Dover weekend l switched between twin 12s and twin 10s with no noticable difference.

However this could be because l am of normal weight   and not skinny.

So my thoughts are that if a BC is suitable for 10s it should be OK for 12s.

[Iestyn]

<font color='#000080'>So consensus seems to be that it would probably be fine underwater but the weight might knacker the jacket in getting there. Best not to risk it methinks. Thanks for the replies. Iestyn.

[louigi]

<font color='#FF0000'>howard I thought I was pushing the weight thing a bit but then It took one hell of a squeeze to get you into my dry suit.
So if your of normal weight then I must be anorexic and poor old Iestyn positively at deaths door.

Se ya soon mat and have a good holliday.

[peter k]

Originally Posted by [b

Quote[/b] (louigi @ April 17 2004,13:29)]So if your of normal weight then I must be anorexic

I think I'm anorexic.........Every time I look in the mirror I see a fat bloke!!!!!

Peter