Deep sea retrieval operation. Object is to lower claw approx. 200 meters, acquire target, release ballast and float target to surface. No submersible vehicle available. No divers available. No choice as to what to use for flotation bodies. Empty propane tanks from gas grills. Have been unable to obtain data on crush depth. No opportunity to experiment. Must be done right first time. Anybody know?
If 'empty' (acetone-filled) acetylene tanks from welding are substituted for propane tanks, will crush depth be increased? Will lifting capability be increased?
2007-04-12 14:09:43 · 5 answers · asked by cdf-rom 7 in Science & Mathematics ➔ Physics
No motor or winch is available to hoist to surface. Must improvise floats.
2007-04-14 15:47:19 · update #1
Scuba tanks not available. Only propane and possibly acetylene tanks available.
Acetylene tanks are exhausted of acetylene. Acetone may remain after acetylene has been exhausted, which wil provide some internal pressure against the external pressure.
How if filled propane tanks are used?
2007-04-14 15:52:08 · update #2
I would be seriously careful doing this. You can prevent the cylinders being crushed by filling them with a light liquid (oil, gasoline, etc) but they won't be very buoyant. Can't you just haul the claw up with a cable instead?
2007-04-12 14:26:15 · answer #1 · answered by nibble 1 · 1⤊ 0⤋
Propane tank relief valves are at around 300 psi. Aluminum 80 SCUBA tanks are rated at 3000 psi. I would think you would get a greater crush depth with the tanks rated to withstand higher internal pressures.
2007-04-12 14:49:54 · answer #2 · answered by zeb 4 · 0⤊ 0⤋
Like some others have correctly stated - the pressure inside their bodies is equalised to the pressure of the surrounding water, thanks to a "swim bladder" - if you were to bring a deep sea fish to the surface too quickly it would indeed endure a very grizzly death - the swim bladder would expand as it pushes against the ever decreasing pressure which would cause it's eyes to pop out, and it's stomach to exit it's body via the mouth. Or if it was a really really quick ascent, it could explode.
2016-04-01 12:07:33 · answer #3 · answered by Anonymous · 0⤊ 0⤋
I'd like to see this with the acetylene tanks.
When the acetylene reaches 30 psi, it can spontaneously explode.
2007-04-12 14:13:27 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Based on my calculations, they will be crushed sooner or later.
2007-04-12 14:13:38 · answer #5 · answered by Anonymous · 0⤊ 0⤋