Instructables

Homemade Diving Apparatus

Step 7: Closing notes

Many modifications could be made to this design; the helmet could be sealed around the diver's neck or onto a dry suit to increase pressure protection and allow for greater depth, although it should be noted that this would make it more difficult for the diver to remove the helmet in the event of an emergency. The topside air supply, as stated earlier, could be eliminated and replaced with a self contained air refresher. You could mod it into an awesome steampunk helmet! The possibilities are endless! be careful, and have fun!
 
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arifshakeel611 months ago
If you are over 18 welcome to the Darwin Club but handing this to a kid would be criminal. You can breathe hold dive 100 feet and when you surface the lungs have the same pressure and volume they started out with. Take a breath in that bucket just 5 feet underwater and surface without exhaling and the lung would be stretched 15% greater in volume. If the weights you duck-taped on to yourself fell off the buoyant helmet would shoot you to the surface you have a good chance of tearing lung tissue tissue. People dived somewhat safely with this style equipment for 200 years but there was a reason the equipement was metal, weighed 200 pounds, needed a team and cost more than a home.
Toga_Dan1 year ago
It should be noted that after breathing compressed air at depth, you must exhale while ascending. Holding your breath while ascending can injure your lungs.

At 10 ft depth, the air is 5psi. When you return to the surface, that air wants to expand.

I don't think you need to worry about the bends at 10 ft. I'm not sure what depth the bends can occur.
Danzeyboy4 years ago
Very clever, well done. I'd probably be too cautious to go under water in anything home-made myself. Brilliant though. Really impressed.