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Debris found came from missing Titan sub, says friend of passengers

bbc.com

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Re: Debris found came from missing Titan sub, says friend of passengers

#501

Post by cowmoo728 »

gamblor956 wrote: post #484
bambax wrote: post #425

Earlier quoted context omitted.

Good video. Some excerpts: "If you're not breaking things, you're not innovating. If you're operating in a known environment as most submersible manufacturers do, they don't break things." (8:49) "Our rule is we risk capital, we don't risk people." (9:56) "We used the same prepreg that's used on the 787." (11:15) And my favorite: "When you're outside the box, it's really hard to tell how far outside the box you reall…

Aircraft grade aluminum is 2024 or 7075, not 6061, because those alloys are more resistant to fatigue from repeated pressurization cycles. 6061 is more commonly used in automotives than in aircraft.

the comment above you is correct that consumer goods will often brag about "aircraft grade" when referring to 6061. like flashlights, tools, combs, pens, cufflinks, money clips, etc.

Re: Debris found came from missing Titan sub, says friend of passengers

#502

Post by gregors »

bambax wrote: post #425
seattle_anon wrote: post #166

Stockton Rush (OceanGate's CEO) was known in the Seattle tech community [0] My understanding (very much not first hand) is that he was seen as an expert in the specific engineering disciplines necessary to safely build and operate deep sea submersibles like Titan. He was also apparently a father to members of the Seattle tech community, who are no doubt grieving at the moment. Please remember that, for some members o…

Good video. Some excerpts: "If you're not breaking things, you're not innovating. If you're operating in a known environment as most submersible manufacturers do, they don't break things." (8:49) "Our rule is we risk capital, we don't risk people." (9:56) "We used the same prepreg that's used on the 787." (11:15) And my favorite: "When you're outside the box, it's really hard to tell how far outside the box you reall…

Now might be a good time to revisit the "calling yourself an engineer" means something specifically debate.

Re: Debris found came from missing Titan sub, says friend of passengers

#503

Post by cma »

itake wrote: post #457
Philip-J-Fry wrote: post #380

Earlier quoted context omitted.

I think the migrant boat disaster is horrible. But I was more interested in this missing sub because it was a bit mysterious what happened to it initially. Then it all comes out how badly built it is, how it's a death trap, etc. It's just more interesting personally. It doesn't mean it's worse than the migrant boat, it's just more interesting and I'd rather read about it. Mysterious cases always get more traction on…

Do you have any details about why it was a death trap? I watched one video that complained about off the shelf parts being used, but the two examples was an RV light (not safety related) and the gaming controller (which they had multiple back ups). They also claimed to have been reviewed by Boeing and University of Washington. There was 7 different mechanisms that could force a return. Some of those were purely mecha…

The whistleblower said they used flammable interior materials. Were the Camper World lights inflammable to the standards of submarines?

Re: Debris found came from missing Titan sub, says friend of passengers

#504

Post by gregors »

carabiner wrote: post #495
bambax wrote: post #425

Earlier quoted context omitted.

Good video. Some excerpts: "If you're not breaking things, you're not innovating. If you're operating in a known environment as most submersible manufacturers do, they don't break things." (8:49) "Our rule is we risk capital, we don't risk people." (9:56) "We used the same prepreg that's used on the 787." (11:15) And my favorite: "When you're outside the box, it's really hard to tell how far outside the box you reall…

> It's a strong indication of bullshit -- name dropping that doesn't have anything to do with the subject matter It means you're using a material that's been vetted over decades in life-critical applications in harsh conditions by expert engineers all over the world. Aerospace aluminums today are derived from Japanese alloys invented in WW2 and were a major innovation in metal aircraft. It's much more expensive than…

this wasn't an aircraft

Re: Debris found came from missing Titan sub, says friend of passengers

#505

Post by renewiltord »

gamblor956 wrote: post #468
renewiltord wrote: post #208

Earlier quoted context omitted.

Yes, it's more similar to https://en.wikipedia.org/wiki/Tham_Luang_cave_rescue than to other disasters, which should illustrate that it's not about the kind of people so much as the story itself. I lived in South Asia for a while and the thing that would strike me is the everyday catastrophes. For instance, there was a recent Indian derailment that you barely heard about here in the US https://apnews.com/article/indi…

For instance, there was a recent Indian derailment that you barely heard about here in the US It was only covered in the NYT, LAT, WaPo, Chicago Tribune, WSJ, USAT, NPR, CNN, MSNBC, ABC News, NBC News, and CBS News....just to name a few.

Fair enough. Same places as the Greek migrants, so I suppose we were operating with a false premise. Most things are quite well covered irrespective of whom the victims were.

Re: Debris found came from missing Titan sub, says friend of passengers

#507

Post by bilekas »

bradstewart wrote: post #374
bilekas wrote: post #357

What really bothers me about the coverage of this, and I'm not totally anti media etc, was that nobody mentioned on the fact that the tracking system lost contact also. It was only mentioned that the communications was lost, if there had of been media mentioning that the tracking device also lost contact, I think a lot of people would have recognised straight await that it was a critical collapse. No deep gauge devic…

Power loss?

Power loss is a real stretch to happen at the same time of communications, I understand that the coms to fail is a non-zero chance of failing, it happens. A transponder is super rare on it's own, but when they both go at the same time, protocol dictates you declare an emergency straight await (the top-side cnc). Not that it would have made a difference, but they certainly would have told the coast guard all of this. Even after waiting FAR too long IMO.

Re: Debris found came from missing Titan sub, says friend of passengers

#508

Post by tristanb »

helios_invictus wrote: post #285
btgeekboy wrote: post #220

Earlier quoted context omitted.

Part of me has been wondering if the noises being heard might be an unexpected discovery of a military (Russian, Chinese, US) submarine operating in the general area. Don’t they submerge for long periods of time without comms?

They do, but not the depths we're talking about (12,500 feet) https://navalpost.com/how-deep-can-a-submarine-dive/ The depth limits of the most known nuclear powered submarines’ depth limits, as follows; Typhoon-class: Test depth 900 m (3,000 ft) Astute-class: Over 300 m (984 ft 3 in) Akula-class: 480 m (1,570 ft) test depth for Akula I and Akula I Improved, 520 m (1,710 ft) for Akula II and III, 600 m (2,000 ft) max…

The Borei Class is not diving to 950 meters (unless its sinking) :)

Re: Debris found came from missing Titan sub, says friend of passengers

#509

Post by checkyoursudo »

robotnikman wrote: post #268
saberdancer wrote: post #243

Earlier quoted context omitted.

San Juan was 2300 tons and is made of metal. Titan was 10 tons and mostly made of carbon fibre.

It also probably was armed with torpedoes when it was sunk, which probably detonated due to the explosive decompression.

> It also probably was armed with torpedoes when it was sunk, which probably detonated due to the explosive decompression.

I don't think that submarines explosively decompress under the ocean.

Re: Debris found came from missing Titan sub, says friend of passengers

#510

Post by gdubs »

TrackerFF wrote: post #452
deanc wrote: post #305

Earlier quoted context omitted.

Can someone walk me through what would have happened, physically, to a human body in the moment this happened. I’m curious. Similar to wondering what happens to people in space.

At that depth, the pressure is quite intense - around 6000 psi. That means 6000 pounds pr square inch - that's almost a Ford F150 truck pr square inch, everywhere. And now imagine how many square inches the surface area of a human is - especially your upper torso where your lungs are located. The sub (hull) is made of a carbon fiber and titanium mix - and I'm not sure how that would react, if it buckles / collapses l…

What if the impassion happened higher towards the surface, like, 2000 feet?
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