10,000 psi 400cuft scuba tank

[Benderr]

I think the compressors he had were good to 6k, and the tank holding sleeves were way too small for the giant tanks he had as mockups... And the compressors were submerged in water for quiet and cool operation, too.

Yes, his compressor needed to be submerged in water.

Whats the burst disk look like?
A 3/4 inch grade 8 bolt?

Or does it even mater at that point...you're going for a ride.

I imagine it would be worse than a ride, but there was no external "valve" to put a disk in. A DIN regulator screwed directly into the top of the tank.

[huxley]

PM sent

does that mean Forrest has a couple of those spheres laying in his basement and sells them off?

[CaveMD]

hmm

a 2' internal diameter spherical tank filled to 6000 psi with transfill whips would truly be a wonderful thing

[TobinGeorge]

hmm

a 2' internal diameter spherical tank filled to 6000 psi with transfill whips would truly be a wonderful thing

There is a good reason that aero space uses spherical tanks, most internal volume for the least surface area, but without running the numbers I'd expect a 24" diameter tank to be considerably thicker than a 18" diameter tank, and the gas alone would weigh ~136 lbs (air or nitrox) Add 100-120 lbs of tank you have genuine nugget to hump around.

Multiple smaller vessels with a higher working pressures would allow for cascade filling, with a greater % of the gas volume recoverable at higher pressures. Each vessel is "man portable" too. (At least for short distances )

Tobin

[CaveMD]

There is a good reason that aero space uses spherical tanks, most internal volume for the least surface area, but without running the numbers I'd expect a 24" diameter tank to be considerably thicker than a 18" diameter tank, and the gas alone would weigh ~136 lbs (air or nitrox) Add 100-120 lbs of tank you have genuine nugget to hump around.

Multiple smaller vessels with a higher working pressures would allow for cascade filling, with a greater % of the gas volume recoverable at higher pressures. Each vessel is "man portable" too. (At least for short distances )

Tobin

I figured a 3-4 cascade of them in the back of a pick up truck. A 250lb tank can be lifted into the back of a pickup truck alone but that's about it...the idea of moving it any further than that is for someone more manly than I.

[OFG-1]

Back in the stone age, we had several of the 24" spheres mounted in the cascade system at Underwater Designers in Jax. They were a pain in the ass, the surplus ones were lined with some product to help keep helium or hydrogen from escaping, the fittings were odd, and they made funny noises when you filled them, they creaked and cracked.