this post was submitted on 08 Mar 2026
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51
Making a 3d-printed Underwater Dive Helmet With A Floating Air Supply (www.youtube.com)
submitted 2 weeks ago by ProdigalFrog@slrpnk.net to c/3dprinting@lemmy.world
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[–] Korhaka@sopuli.xyz 8 points 2 weeks ago (3 children)

First thought was nope nope nope to diy diving helmet, but looks like it would be quick to remove so not too bad. Feels way overengineered if you just wanted to sit in your pool though.

I know snorkels get into problems with depth as your lungs can't inhale against the pressure. But I am curious how deep that would get you. The dead air in the snorkel is another issue but you can solve that easily with some valves or just exhaling through your nose. Bit impractical to have a very long rigid snorkel but a tube attached to a float could work. Just not sure what the depth limit would be before you can't fill your lungs anymore. 1m? 5m?

[–] ProdigalFrog@slrpnk.net 12 points 2 weeks ago* (last edited 2 weeks ago) (1 children)

His design is essentially a diving bell helmet with a pressurized feed of air from an air compressor, so the lungs don't have to overcome breathing through a snorkel. He plans to use it in shallow areas around Florida, he was only testing it in his pool.

[–] phoenixz@lemmy.ca 6 points 2 weeks ago (2 children)

Though this is awesome and cool, but I feel like we're waiting for the first "I have no clue about physics or what I'm doing" ending up dead

[–] Korhaka@sopuli.xyz 2 points 2 weeks ago (1 children)

Should be ok as it isn't going that deep anyway. If it fails you get out and surface.

[–] phoenixz@lemmy.ca 3 points 2 weeks ago (1 children)

Oh I know, and I'm not worried about the guy trying this in his pool

I'm worried about the idiot who thinks this too will work for a 30 meter dive, because there is always THAT guy who knows it all

[–] Korhaka@sopuli.xyz 2 points 2 weeks ago (2 children)

I can see someone strapping the helmet to their head, then get a leak while 1m deep. They notice when it fills up. Panic and try to get it off, can't. Surface, it's still full of water because the leak is at the air entry hole and they designed it to fit snugly around the neck and it won't drain without tipping upside down. Drowns while struggling to undo the straps holding it on

[–] ProdigalFrog@slrpnk.net 2 points 2 weeks ago* (last edited 2 weeks ago) (1 children)

I'm assuming you didn't watch the video, but this particular helmet design has a completely open bottom. the only thing keeping the water beneath you out is the positive pressure from the air hose. Any excess air flows out the bottom.

it needs weights attached to it to keep it from floating (he attached just enough weight to keep it neutrally buoyant). If it sprung a leak, you would easily be able to remove the helmet either by lifting it up off you, or tilting forward or to the side and sliding it off. it is not strapped to the person at all.

[–] Korhaka@sopuli.xyz 1 points 2 weeks ago (1 children)

Yes, this one does. Someone copying it may make poor choices and change it in ways that are dangerous.

[–] ProdigalFrog@slrpnk.net 0 points 2 weeks ago (1 children)

Hm. Out of curiosity, do also believe that instructional videos of how to do house construction, electrical work, or brake repair on cars should not be freely available to prevent people from watching it and doing incorrectly and dangerously?

[–] Korhaka@sopuli.xyz 1 points 2 weeks ago (1 children)

Also believe? I don't think I ever said anything shouldn't be freely available.

[–] ProdigalFrog@slrpnk.net 1 points 2 weeks ago (1 children)

Your previous comment lead me to think that you disapprove of instructional videos of things that if replicated by someone who does it incorrectly it would become dangerous or life-threatening.

[–] Korhaka@sopuli.xyz 1 points 2 weeks ago

More speculation on how someone could mess up trying to copy it if they don't consider safety

[–] phoenixz@lemmy.ca 1 points 2 weeks ago (1 children)

This too

Way too many ways for this to go wrong in the hands of dumb people

[–] Korhaka@sopuli.xyz 1 points 2 weeks ago (1 children)

Iron lung diving snorkel setup. Allows you to overcome the pressure and use a 15m long snorkel!

And you accidentally set it to the wrong depth and blow up your lungs.

[–] ProdigalFrog@slrpnk.net 1 points 2 weeks ago (1 children)

How would it blow up your lungs?

[–] Korhaka@sopuli.xyz 1 points 2 weeks ago (1 children)

Overpressure, 10m deep is roughly double the pressure at sea level.

[–] ProdigalFrog@slrpnk.net 1 points 2 weeks ago* (last edited 2 weeks ago)

I'm not super well versed with diving, but wouldn't the excess pressure and air just go out the bottom of the helmet? it's open to the water below, similar to shallow-water helmets, which are used by untrained tourists.

[–] yggstyle@lemmy.world 1 points 2 weeks ago (1 children)

Considering the other content he's produced I'd say this guy at least understands pressure reasonably well. The crab reference is a nod to the scary shit pressure can do to ... Living things. (There's some really nsfl shit out there on the topic.)

[–] phoenixz@lemmy.ca 1 points 2 weeks ago (2 children)

I'm sure he understands it all

Will all the viewers who are going to replicate this thing understand it?

[–] yggstyle@lemmy.world 2 points 2 weeks ago

Certainly not.

The first time I read how to make thermite, smoke bombs, etc.. I definitely was too young to fully work out the ramifications of my actions.

With that said: how many people ignore warnings that are clearly posted? That's a human flaw. It's not age gated. Needing to see for ourselves that the stove is hot sometimes is the only way we learn. Acknowledging this - does it mean we shouldn't provide the knowledge because somone may do something stupid? I don't believe that should be the case.

In short: people are going to do dumb shit - but I don't think that means we need to over engineer the world to protect them from themselves.

[–] Korhaka@sopuli.xyz 1 points 2 weeks ago (1 children)

This is why I keep to shallow freediving or snorkeling. There also isn't anything of value to see in the water here which helps. Sometimes the water is almost clear enough to see your feet. Did manage to swim through a school of tiny fish before.

Not having to surface as often could be nice, but most ways of doing that involve quite a few risks and/or costs, so a snorkel is probably the best choice.

[–] phoenixz@lemmy.ca 1 points 2 weeks ago

It just isn't as cool though, which I think is a factor as well for many

[–] Sphks@jlai.lu 2 points 2 weeks ago (1 children)

My concern would be about lungs overpressure when going to the surface (and ears overpressure too, when going down/up, but less deadly).

[–] Korhaka@sopuli.xyz 3 points 2 weeks ago

Yeah, it's adding some risks of diving without many of the safety mechanisms or training.

[–] Blue_Morpho@lemmy.world 1 points 2 weeks ago

His helmet is pressurized but if it's just a snorkel then 1 meter is the limit. I tried as a kid.

[–] PointyFluff@lemmy.ml 3 points 2 weeks ago (2 children)

The oceangate is strong with this moron.

[–] Gumus@lemmy.dbzer0.com 10 points 2 weeks ago (2 children)

Check out his videos. If anyone knows how to properly calculate pressure for any application, it'd be Hyperspace Pirate. I agree this idea is silly and unnecessary (as he acknowledges himself), but it's done safely. He's done many projects more dangerous than this.

[–] KyuubiNoKitsune@lemmy.blahaj.zone 4 points 2 weeks ago

He also burned the fuck out of his head not long ago by doing something silly.

Still love his videos tho.

[–] eleijeep@piefed.social 2 points 2 weeks ago (2 children)

I don't know why you're giving him that credit; he's almost killed himself once already.

(Warning: images of serious chemical burn injury) https://youtu.be/WW6ty2aeZ-k?t=473

[–] janewaydidnothingwrong@lemmy.world 5 points 2 weeks ago (1 children)

So? He is a hobbyist who documents his projects, he isnt advocating that people do all the same stuff he does. People have accidents all the time, it doesnt negate their intelligence.

[–] phoenixz@lemmy.ca 0 points 2 weeks ago (1 children)

I'm not saying this guy is too dumb

I'm saying half the internet is too dumb for this and people with zero knowledge and experience will try to replicate this and die

[–] Blue_Morpho@lemmy.world 1 points 2 weeks ago* (last edited 2 weeks ago)

Mythbusters was awesome, did far more dangerous home made stunts and broadcast to a wider audience than this guy.

[–] yggstyle@lemmy.world 2 points 2 weeks ago

I'd give him credit for explaining (frequently) how dangerous what he is doing is... and frankly his willingness to quite literally showcase what the result of the badness can be.

Too few channels do either. And there's some wildly dangerous shit posted daily that is over-edited and rarely even touches on the very real dangers of what they showcase. It gives the illusion of safety to people who likely don't understand the science / risks.

[–] yggstyle@lemmy.world 3 points 2 weeks ago

Considering how willingly he comments on the badness that can happen.... And the fact he actually pressure tests his builds AND does the math ... I'd say he's a far cry from a company that pressure tests their builds with passengers. Live. Breifly.

I appreciate his content. Its interesting and hearkens back to old youtube content before it became a glorified ad stream. Its a dude doing a thing and taking you along for the ride. If you are entertained? Cool. If you learned something? So much the better.