Looks like The Titanic killed a few more people

[UNCjigga]

Ok, poking fun at billionaires dying seemed kinda gross and didn’t sit well with me…but seriously, fuck THIS guy.

Edit: My ire is directed at Concannon, not the Tweeter.

https://twitter.com/x/status/1671501664396750851

 

[pmv]

Quite an interesting/alarming video (depending on your relation to this event). Though I had no idea all those major landmarks had been sunk to the sea floor. Also they left out PCGeek11 (unless he's in one of those navy subs?)

https://twitter.com/x/status/1671319708929335297

 

[skyking]

I recommend that anybody who thinks rescuing people in space is easy (or easier than a deep ocean rescue) take a long gander at Appendix D.13 (STS-107 In-Flight Options Assessment) of the Columbia Accident Investigation report.

I don't need to. They knew that Columbia was screwed from the get-go and they just said the best option is to roll the dice .
Here's a nice write up in ArsTechnica

Weiterleitungshinweis

 

[Vic]

Hate to say it but I already got a super bad feeling that we're gonna end up knowing more about the fate of MH370 than this sub.

 

[skyking]

And yet people would rather talk about Amelia Earhart.
It's just bizarre.

 

[IronWing]

Bar and ATM are just units of convenience, just like a BTU or HP in English units.


Yeah, people like to bastardize SI just like they like to bastardize English Units. WTF is a KG/cm^2 on my tire gauge?

That's equivalent to Sidewalls (Sw). "What's our pressure, Mr. Crane?" "14 Sw, Admiral." "Raise the periscope."

 

[Jaskalas]

Even if we hear noises, even if they had O2....
We have no means of rescue from that depth.

 

[hal2kilo]

Times running out. Why no comms? Power problem? It's really cold down there. The gear that they have to have to pull up the mini sub will barely be in place. Oh, and, they still don't know where it is, at this point even if the gear gets there.
Not a good outlook.

 

[sdifox]

Times running out. Why no comms? Power problem? It's really cold down there. The gear that they have to have to pull up the mini sub will barely be in place. Oh, and, they still don't know where it is, at this point even if the gear gets there.
Not a good outlook.

Even if they knew the location of it at all times, lifting it from 3800m down in high flowing current is low probability at best. The DSRVs can dive to 600m at most. And it's not like this thing has the mating collar anyway.

 

[Paratus]

I don't need to. They knew that Columbia was screwed from the get-go and they just said the best option is to roll the dice .
Here's a nice write up in ArsTechnica

Weiterleitungshinweis

We did not know Columbia was screwed from the get go.

It was assumed at the time the leading edge reinforced carbon-carbon material was too tough for shed tank foam to penetrate.

Shuttle program management made the incorrect decision not to pursue better imagery based on that erroneous belief and instead assumed it would be a maintenance issue. Almost (but not quite) all previous foam strikes ended up causing damage requiring thermal protection system maintenance but did not threaten overall vehicle safety.

The results below were shocking when they test fired a chunk of foam into the leading RCC under the conditions on Columbia’s last ascent:

The factors that led to this incorrect assumption was the supposed toughness of the RCC which was strong but brittle and the assumption a chunk of foam couldn’t get enough velocity to cause much damage. In this case the large chunk fell off right during increasing acceleration and while the atmosphere was still thick enough to impart a large drag force.

The other factor was what is called normalization of deviation. The external tank shed foam so often that it became normalized. Efforts to mitigate it were made but only partially successful and since it normally didn’t cause a major issue it was assumed it never would.

If we had gotten imagery on flight day 2 or 3 and seen the extent of the damage we very likely could have done something like in the Ars article.

 

[sdifox]

I am kind of surprised Elon didn't say he can save them.

 

[sdifox]

This reminded me of this Douglas Adams quote.

"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at or repair."

 

[amenx]

Times running out. Why no comms? Power problem? It's really cold down there. The gear that they have to have to pull up the mini sub will barely be in place. Oh, and, they still don't know where it is, at this point even if the gear gets there.
Not a good outlook.

The same sub had to abort an earlier dive to the Titanic last year due to power issues. The batteries were draining too fast so had to abort during the first hour of the dive.

 

[coldmeat]

In the BBC doc Take Me to Titanic, when they reached the bottom on a dive last year they found they installed one of the thrusters backwards and could only spin in a circle.

 

[pcgeek11]

You'd need a ship with that much cable that was strong enough to maintain it's own weight, plus the weight of the sub and contents (water, people, etc), and a way to attach it which I'm guessing this thing didn't have.

Carbon Fiber Hull. No attachment points for hauling. The carbon fiber hull would probably tear apart from the stress.

 

[[DHT]Osiris]

I agree about the lack of redundant systems and emergency beacon on Titan. I was reffering to the lack of escape hatch and the inability to egress the vehicle without assistance from the outside. I really don't consider James Cameron a idiot, foolish or reckless in what he does. So there could be a perfectly good engineering reason for DSV's that the hatch is bolted from the outside before diving and is not capable of being opened from the inside.

Lil late, but afaik the thing is too heavy to be buoyant at sea level, so it floats a little under. I don't think there's any form of 'remove hatch' (explosive bolt or otherwise) that can separate that cover from the hold. Too much water pressure keeping it in place. It's like trying to roll a car window down underwater.

 

[pcgeek11]

Is buoyancy normalized at all depths? Water doesn't compressed so my smart-lizard brain says it should be equally buoyant... Either way, you still gotta attach a string to something, with something. Not like you're gonna snag it dredging the bottom.

The buoyancy will vary somewhat depending on the salinity of the water.

More salt = more buoyancy. The salt content at sea is variable. Some areas in the ocean are nearly fresh water.

Salt layers also make it hard to locate an object as it masks sounds and causes a scattering effect.

 

[pcgeek11]

Would you be surprised to know that the Virginia Class attack submarine uses a Xbox controller to control it's periscope?

https://www.cnet.com/science/us-navy-launches-submarine-maneuvered-by-xbox-controller/

Nope. Not surprised at all.

I'm old and prefer an old fashioned hydraulic periscope with real lenses and mirrors.

 

[[DHT]Osiris]

Carbon Fiber Hull. No attachment points for hauling. The carbon fiber hull would probably tear apart from the stress.

Yeah that's a fuckin' problem too.

Almost like they expected nothing could possibly go wrong. It's like Jurassic park, but a fucking tube underwater.

 

[brycejones]

[/QUOTE]

I am kind of surprised Elon didn't say he can save them.

No kids are involved for him to get close to. Just saying

 

[pcgeek11]

Fascinating. From a guy who visited the Titanic in a Russian submersible and experienced violent currents that banged their sub against the wreckage. So I can guess what might have gone wrong with the Titan.

Russian Submersible.

Wow he has some huge balls.

 

[pcgeek11]

What a shithead.

Stockton Rush's thoughts on safety:

Red Flags: Titanic Sub Company Was Warned About Safety

OceanGate heard complaints from ex-employees and industry experts about its vessels well before this weekend’s ill-fated mission.

www.thedailybeast.com

Rush was quoted in a 2019 Smithsonian magazine piece expressing similar sentiments, bemoaning the fact that the submersibles industry “hasn’t innovated or grown—because they have all these regulations.” He specifically criticized the Passenger Vessel Safety Act of 1993, which imposed new standards on passenger vehicles for hire, for prioritizing passenger safety over commercial innovation, according to the profile.

The company posted an article on its website that same year about why its vessels are not “classed,” or assessed by outside inspectors like those the letter-writers recommended. In the post, first unearthed by Vice, the company claimed that “bringing an outside entity up to speed on every innovation before it is put into real-world testing is anathema to rapid innovation.”

“This does not mean that OceanGate does meet standards where they apply,” it added, “but it does mean that innovation often falls outside of the existing industry paradigm.”

 

[zinfamous]

Carbon Fiber Hull. No attachment points for hauling. The carbon fiber hull would probably tear apart from the stress.

ooo, good call. it has to have some sort of framed reinforcement, know...or does that just compromise the carbon fiber at those pressures? pushing against a frame like that?

anyway, makes sense to me, maybe sounds stupid. haha.

 

[zinfamous]

Yeah that's a fuckin' problem too.

Almost like they expected nothing could possibly go wrong. It's like Jurassic park, but a fucking tube underwater.

Nice caption. Where's our wiz cartoonist(s)?

 

[ElFenix]

That's equivalent to Sidewalls (Sw). "What's our pressure, Mr. Crane?" "14 Sw, Admiral." "Raise the periscope."

this is a deep cut