this post was submitted on 28 Dec 2024
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Greentext

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[–] [email protected] 122 points 1 week ago (1 children)

The biggest problem is he's engineering in Imperial instead of SI units.

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[–] [email protected] 81 points 1 week ago (3 children)

Am I assuming correctly that we're looking at a big succ-situation, where the diver will big forced through the tube no matter what?

[–] [email protected] 57 points 1 week ago* (last edited 1 week ago) (5 children)

It's a difference of like 7 psi over an area of what looks like maybe 30 square inches, which would be uncomfortable to get caught in, but I don't think you're getting Byford Dolphined

[–] [email protected] 15 points 1 week ago (2 children)

Ahhh yeah that's where I've heard it before, WTYP had an episode on that!

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[–] [email protected] 14 points 1 week ago

210 lbs will certainly keep you stuck there though

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[–] [email protected] 20 points 1 week ago

Is 5m enough for that? I feel like no, but i have no idea.

[–] [email protected] 9 points 1 week ago
[–] [email protected] 51 points 1 week ago* (last edited 1 week ago) (3 children)

This unfortunately happened in real life.

Edit: other way around though. The divers were on the air side (habitable quarters) of the chamber.

[–] [email protected] 50 points 1 week ago* (last edited 1 week ago) (2 children)

For more clarification, they were on the high pressure air side. The kind of dives they were doing involved long periods of acclimation to the different pressures involved, so the diving bell was pressurized to 9 atmospheres. Someone fucked up, and the door opened. 9 atmospheres turned into 1 atmosphere very quickly, and the only good thing is that it happened so fast that the deceased wouldn't have even noticed

If you want to see an episode of a podcast about engineering disasters which is itself, ironically, an engineering disaster, well there's your problem

[–] [email protected] 28 points 1 week ago (1 children)

Just for what it’s worth, it looks like it was actually an equipment malfunction, not someone fucking up, that caused the accident. The company claimed the person fucked it in an attempt to cover their asses, and they were eventually found to be hiding the truth in a court of law.

[–] [email protected] 11 points 1 week ago

Justice should be violent

[–] [email protected] 23 points 1 week ago* (last edited 1 week ago) (2 children)

No one fucked up, they finally settled on it being a mechanical failure.

Edit: the company and government fucked up, I meant to imply none of the divers fucked up.

[–] [email protected] 38 points 1 week ago

The company fucked up by not updating their equipment, even though they knew it was outdated and dangerous

“The North Sea Divers Alliance, formed by early North Sea divers and the relatives of those killed, continued to press for further investigation and, in February 2008, obtained a report that indicated the real cause was faulty equipment. Clare Lucas, daughter of Roy Lucas, said: "I would go so far as to say that the Norwegian Government murdered my father because they knew that they were diving with an unsafe decompression chamber."[11] The families of the divers eventually received compensation for the damages from the Norwegian government, 26 years after the incident.[12]

[–] [email protected] 12 points 1 week ago

They company fucked up, they did not maintain their equipment.

[–] [email protected] 12 points 1 week ago (2 children)

Some parts of that article are straight horror.

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[–] [email protected] 43 points 1 week ago

But where's Saddam?

[–] [email protected] 39 points 1 week ago* (last edited 1 week ago) (2 children)

I don't see the problem.

I mean, I don't swim, but the dynamics seem to make sense.

What am I missing?

Edit: Ah, don't go near the water passage, right?

[–] [email protected] 29 points 1 week ago (2 children)
[–] [email protected] 8 points 1 week ago (1 children)

Ouch!

And just to think, we're all gradually evolving into crabs..

[–] [email protected] 7 points 1 week ago

no we're not carcinisation is a vastly overblown meme it's other crustaceans in similar environments evolving into crab like forms as they already fill the same ecological niche and a crab body is perfect for that ecological niche any other creature is not evolving into crabs I hate the carcinisation meme

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[–] [email protected] 31 points 1 week ago

When it’s got ya, it’s got ya.

[–] [email protected] 30 points 1 week ago

This really Byfords my Dolphin

[–] [email protected] 25 points 1 week ago

DELTA P 🗣️🗣️

[–] [email protected] 25 points 1 week ago (2 children)

Wouldn't this human in theory become a crumpled sausage like what happened to the crab by the leaking underwater pipe?

[–] [email protected] 41 points 1 week ago* (last edited 1 week ago) (3 children)
[–] [email protected] 44 points 1 week ago

They also alleged the accident was due to a lack of proper equipment, including clamping mechanisms equipped with interlocking mechanisms (which would be impossible to open while the chamber system was still under pressure), outboard pressure gauges, and a safe communication system, all of which had been held back because of dispensations by the Norwegian Petroleum Directorate.

Fatigue may also have taken its toll on the crew, who had been working for longer than 12 hours

Builder of the rig Aker ASA's Gross Profit was 7.16B

Norway's oil and gas tax revenue soars to record $89 bln

Imagine forcing your workers into more than 12h shifts, running on 30 year old equipment, the government straight up refusing to upgrade said equipment, while making billions in profits - they don't call it gross profit for no reason....

[–] [email protected] 15 points 1 week ago (2 children)

Fuck all of this

Normally when people say this it is at least a bit of an exageration, but not in this case. That is some straight up nightmare fuel.

Heres a taster for those of you who don't want to read the whole thing.

...bisection of his thoracoabdominal cavity, which resulted in fragmentation of his body, followed by expulsion of all of the internal organs of his chest and abdomen...

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[–] [email protected] 22 points 1 week ago (11 children)

Not at 15 feet. I don't know enough to say how fast the water would be leaving that hole, but it's maybe a couple hundred pounds of pressure. If he even got caught, it would be super uncomfortable, but he ain't about to get ∆p'd

If you wanna see a real crab-in-a-pipe situation, look up that Byford Dolphin everyone's talking about

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[–] [email protected] 24 points 1 week ago* (last edited 1 week ago) (4 children)

anon's in trouble because they're using psi instead of bar.

Edit: also fuck high pressures are a scary thing.

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[–] [email protected] 21 points 1 week ago (3 children)

I'm unfamiliar with fluid dynamics. How intense would the Delta p problem be in this situation?

[–] [email protected] 13 points 1 week ago (1 children)
[–] [email protected] 22 points 1 week ago (1 children)

from the wiki

Investigation by forensic pathologists determined that Hellevik, being exposed to the highest pressure gradient and in the process of moving to secure the inner door, was forced through the crescent-shaped opening measuring 60 centimetres (24 in) long created by the jammed interior trunk door. With the escaping air and pressure, gross dismemberment ensued; it included bisection of his thoracoabdominal cavity, which resulted in fragmentation of his body, followed by expulsion of all of the internal organs of his chest and abdomen, except the trachea and a section of small intestine, and of the thoracic spine. These were projected some distance from the bell, with one section being found 10 metres (30 ft) vertically above the exterior pressure door.

Soup indeed.

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[–] [email protected] 12 points 1 week ago (1 children)

I feel like a delta of less than 10 psi doesn't sound so bad

[–] [email protected] 19 points 1 week ago (3 children)

It depends on the size of the opening. If it's small that's no problem. You could block a 1 inch pipe at 10psi with your bare hand and be largely fine. It's a little less than 10 pounds of force assuming a round opening.

The problem is that the total force scales geometrically with the size of the opening. Make it two feet wide at the same 10psi and now you've got about 4500 pounds of force trying to push you though that opening should you find yourself in the unfortunate situation that it's been completely blocked by your body.

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[–] [email protected] 7 points 1 week ago
[–] [email protected] 20 points 1 week ago (4 children)

Do NOT put your dick or butthole there

[–] [email protected] 18 points 1 week ago (13 children)
[–] [email protected] 35 points 1 week ago (2 children)

Muricas version of pressure.

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[–] [email protected] 15 points 1 week ago (1 children)

pounds per square inch. the us version of bar or n/m²

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[–] [email protected] 10 points 1 week ago

It's what you need to power your Protoss army

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[–] [email protected] 13 points 1 week ago

Top 10 ∆P incidents

[–] [email protected] 12 points 1 week ago

Yeah I read about it. Definitely not the nicest way to go.

[–] [email protected] 11 points 1 week ago

Water go sluuuurp, human go squish.

[–] [email protected] 10 points 1 week ago

Danger Zone!

[–] [email protected] 10 points 1 week ago

Safety video for anyone with an interest: https://www.youtube.com/watch?v=AEtbFm_CjE0 Delta P is stuff of nightmares.

[–] [email protected] 8 points 1 week ago

Is this like the end of that Aliens movie?

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