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Dry atmosphere submersible HPV

by duke, published

Dry atmosphere submersible HPV by duke May 3, 2010

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Description

This is a one-man submarine that I have designed. It is dry atmosphere which means that you do not need to wear SCUBA gear inside of it. It incorporates a single center ballast tank, twin air tanks for breathing and buoyancy compensation, rudder controls for pitch/yaw, etc. It is propelled by twin contra-rotational, coaxial propellers driven by conventional bicycle pedals.

Recent Comments

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Depending on what you mean by "great depths". You could pressurize it, yes, but to a certain point. Breathing air under pressure has some consequences to it. You may either breathe it for too long or ascend too quick, and you'll trap air bubbles in your tissues, this is known as nitrogen poisoning. If you go too deep, say 50 meters, you will experience oxygen toxicity, usually leading to death, since you'd become paralyzed. Plus ascending may require decompression (otherwise you'll trap air in your tissues, this is considered rather painful).

Best is to have a solid body and have 1 bar pressure inside.No decompression and no problems. Unless the shell breaks ;)

Since it's polycarb, the whole boat is basically a window. I wasn't planning to submerge it for longer than the air tanks could sustain the atmosphere, but if you wanted to, you could scrub the air with Lithium Hydroxide or something.

what about windows? or atmosphere scrubbing?

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License

GNU - GPL
Dry atmosphere submersible HPV by duke is licensed under the GNU - GPL license.

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Instructions

Unfortunately I have yet to build a full scale working prototype of this design, the limiting factor being the cost of producing the high pressure polycarbonate shell. I decided on a transparent hull because ferrous materials would interfere with the magnetic guidance system, and cheaper materials such as fiberglass would not withstand the high pressure imposed on a dry atmosphere submersible at any reasonable depth. Also, it would be way cooler if it were clear. I have however built 1/10th scale working models of the drivetrain, and I am very satisfied with it's simple, robust design.

Comments

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nothinman on Sep 6, 2012 said:

Depending on what you mean by "great depths". You could pressurize it, yes, but to a certain point. Breathing air under pressure has some consequences to it. You may either breathe it for too long or ascend too quick, and you'll trap air bubbles in your tissues, this is known as nitrogen poisoning. If you go too deep, say 50 meters, you will experience oxygen toxicity, usually leading to death, since you'd become paralyzed. Plus ascending may require decompression (otherwise you'll trap air in your tissues, this is considered rather painful).

Best is to have a solid body and have 1 bar pressure inside.No decompression and no problems. Unless the shell breaks ;)

puzzler300 on Sep 6, 2012 said:

what about windows? or atmosphere scrubbing?

duke on Sep 6, 2012 said:

Since it's polycarb, the whole boat is basically a window. I wasn't planning to submerge it for longer than the air tanks could sustain the atmosphere, but if you wanted to, you could scrub the air with Lithium Hydroxide or something.

inventworld on Oct 12, 2011 said:

It would be possible to pressurize the inside of the craft to counteract the force of water on the outside in order to use a weaker material even at great depths. It would require additional high pressure tanks to be added buts one option to think about.

Anonymous on May 3, 2010 said:

So build an RC version at small scale; suitable for lab mouse testing. Or build at 1/12 scale suitable for GI Joe photo mock-up.

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