80cu Tank at 800 Feet ????

[parzdiver]

Since there was never any reason for me to even ponder this complication, I suppose an engineering analysis is called for.

Question of the day:
Assume the crotch area of a drysuit is half a square foot or about 36 square inches. Let's say your argon bottle for equalizing the suit is empty at 600'. How much deeper can you go before your family name hits a road block?

BTW, what is Lmao?

First, just wear a cup.

Second, LMAO = Laughing My Arse Off.

 

[Jax]

First, just wear a cup.

Owww! That would leave a mark!

 

[speedyal]

First, just wear a cup.

Second, LMAO = Laughing My Arse Off.

Have you actually tried this ?

 

[Akimbo]

Owww! That would leave a mark!

One must also consider the secondary ramifications to a catheter. It's not like there are NASA research reports we can refer to.

 

[Cave Diver]

Since there was never any reason for me to even ponder this complication, I suppose an engineering analysis is called for.

Question of the day:
Assume the crotch area of a drysuit is half a square foot or about 36 square inches. Let's say your argon bottle for equalizing the suit is empty at 600'. How much deeper can you go before your family name hits a road block?

BTW, what is Lmao?

Probably deeper than you'd think. Assuming that your suit is adequately filled at the time you ran out of argon, increased depth has diminishing pressure ratios. Your greatest change was in the first atmosphere where you reduce the volume in the suit by half.

Assuming that reducing the volume by a 1/4 is the point where it starts to become uncomfortable, I estimate you'd be at ~750' before you reached the same level of reduction of 1/4 of your starting volume from 600'.

 

[Jax]

One must also consider the secondary ramifications to a catheter. It's not like there are NASA research reports we can refer to.

Wow . . . would one be able to even use a catheter at those pressures?

 

[Akimbo]

Probably deeper than you'd think. Assuming that your suit is adequately filled at the time you ran out of argon, increased depth has diminishing pressure ratios. Your greatest change was in the first atmosphere where you reduce the volume in the suit by half.

Assuming that reducing the volume by a 1/4 is the point where it starts to become uncomfortable, I estimate you'd be at ~750' before you reached the same level of reduction of 1/4 of your starting volume from 600'.

On the serious side, you are correct. Since there never has been a reason for me to consider the root problem before, I suppose I would begin with these assumptions:

Take the amount of lead needed to reach neutral buoyancy. For the sake of conversation and me being lazy and all, lets assume it is 32 Lbs. That means that your drysuit volume is not more than 0.50 Ft³.

1000' = 30.3 Atmospheres of increased pressure, so you need to get no less than 15.15 Ft³ of usable gas out of the bottle. Without going nuts and adjusting for the compressive characteristics of Argon or temperature, how much extra gas is appropriate? Do any of you have real-world suit equalizing gas consumption rates for a bounce dives (no wondering above and back to max depth)?

 

[Cave Diver]

Wow . . . would one be able to even use a catheter at those pressures?

I believe that is one of the reasons for having a balanced p-valve.

 

[kanonfodr]

I believe that is one of the reasons for having a balanced p-valve.

Either a balanced P-Valve, or pre-charging it as you get into the water. Or just to be safe, both .

Peace,
Greg

 

[speedyal]

you could pee into some sort of a vaccum