Them
Contributor
The 1st kit can have a SS plate swapped in for $28 IIRC...that's one of the drop-down options.
Comments on two bp/w packages?
- Thread starter Malpaso
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You almost certainly don't need a 40 lb wing, unless you are either very large, or wearing a ton of very floaty neoprene. 35 pounds should cover you for almost all cold water diving, unless you intend to put all your ballast ON your rig -- and there are some reasons not to do that.
ams511
Contributor
Do you realize that the wing is an Oxycheq not a Dive Rite? The only thing Dive Rite is the plate, harness, and cam straps. From what I remember there is not a big difference in size from the 30 to the 40 so the difference should not be very noticeable underwater. Also do we know what tanks the OP is using?
My comment didn't say anything about brand . . . I was just reacting to the OP's decision to go with a 40 lb wing. If you do the math, a 40 lb wing is rarely necessary for single tank diving, no matter what single tank the diver is using. You either need 30+ pounds of negative stuff ON the rig (that you need to float at the surface) or you need to have more than 30 lbs of buoyancy that you are going to lose at depth. That requires a big person covered with a lot of thick neoprene, as I stated.
Them
Contributor
Not sure I'm following your buoyancy requirement reasoning.
If your suit has 36lbs at the surface, and at max depth that drops to 26, that's 10lbs you need to be able to make back with the BC/Wing. I don't know if it is really 10lbs, that's a total guess.
If your tank is -4 when full, and +2 empty, that's another 6lbs variable buoyancy needed.
If you need to hold your head above water at the surface, you can take the 10lbs from your suit crush buoyancy (because your suit won't be crushed at the surface) and maybe add another 10 to give you a fair shot at breathing without finning.
That's 26lbs buoyancy variation needed.
Your lead isn't going to change over the dive, or if it does it isn't going up.
You might drop some gear, but unless it is a hood or gloves it will probably cause you to need less buoyancy, not more.
You really don't want to be in a position of needing a lot of wing buoyancy under water, because the wing is a potential point of failure.
I'm probably missing something, but that's what I went through when I chose the 30lb for myself. I was also assuming a drysuit rather than thick wetsuits.
Thinking about it, at 4 bar it is possible the wetsuit could have 1/5th the buoyancy I guess. In that case 40lbs sounds good.
If your suit has 36lbs at the surface, and at max depth that drops to 26, that's 10lbs you need to be able to make back with the BC/Wing. I don't know if it is really 10lbs, that's a total guess.
If your tank is -4 when full, and +2 empty, that's another 6lbs variable buoyancy needed.
If you need to hold your head above water at the surface, you can take the 10lbs from your suit crush buoyancy (because your suit won't be crushed at the surface) and maybe add another 10 to give you a fair shot at breathing without finning.
That's 26lbs buoyancy variation needed.
Your lead isn't going to change over the dive, or if it does it isn't going up.
You might drop some gear, but unless it is a hood or gloves it will probably cause you to need less buoyancy, not more.
You really don't want to be in a position of needing a lot of wing buoyancy under water, because the wing is a potential point of failure.
I'm probably missing something, but that's what I went through when I chose the 30lb for myself. I was also assuming a drysuit rather than thick wetsuits.
Thinking about it, at 4 bar it is possible the wetsuit could have 1/5th the buoyancy I guess. In that case 40lbs sounds good.
Them
Contributor
What was their reasoning/how did they explain it?
As far as I know the BC/Wing needs to be able to offset the normal variations in buoyancy for your configuration, and a little more. So they are anticipating 35-40lbs of variability in your total buoyancy (disregarding the wing). I'm not questioning their estimate, I'm just curious how they got there (because I want to be able to make those estimates myself).
As far as I know the BC/Wing needs to be able to offset the normal variations in buoyancy for your configuration, and a little more. So they are anticipating 35-40lbs of variability in your total buoyancy (disregarding the wing). I'm not questioning their estimate, I'm just curious how they got there (because I want to be able to make those estimates myself).
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