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Originally Posted by Mr_Blastman

I feel way less comfortable now with Boeing's use of carbon fiber on their airplane hulls now.


You shouldn't.

Gas tanks and pressurized cabin airplanes -> pressure inside higher than outside -> composites subjected to tensile load (and that's what all of the fibre-based composites are excellent at).
Submersible vehicle -> pressure outside higher than inside -> composites subjected to compressive load (they're much less suitable for such scenario).

Completely different kettle of fish.

Then, as F4U mentioned, there's a multiple orders of magnitude pressure difference between both usage cases.

It's all extremely simplified explanation I admit, but there's no need to be worried about composite fuselage integrity in modern airliners, as long as they're operated, maintained and repaired properly (but that applies to full-aluminum fuselages as well).

Last edited by Art_J; 06/23/23 10:24 AM.
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The bottom line for me here is that if there was malfeasance involved with the inspections, maintenance and overall design decisions of the submersible then that overrules any kind of waiver that was signed by the passengers.

And yes, the CEO is deceased but surely this company has some kind of board of directors and other executives? I don't think the company instantly vanishes because the CEO is gone.


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Originally Posted by Art_J
Originally Posted by Mr_Blastman

I feel way less comfortable now with Boeing's use of carbon fiber on their airplane hulls now.


You shouldn't.

Gas tanks and pressurized cabin airplanes -> pressure inside higher than outside -> composites subjected to tensile load (and that's what all of the fibre-based composites are excellent at).
Submersible vehicle -> pressure outside higher than inside -> composites subjected to compressive load (they're much less suitable for such scenario).

Completely different kettle of fish.



Wow, you read my mind. I was just going to post about the difference between high internal pressure tension vs high external pressure compression...


Oh well, I did find a good video with James Cameron

https://youtu.be/LEBCc-Qpilw


I don't know who made the decision to keep from the public all the critical information pointing to implosion but I am guessing the families were told early on.




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The pressure at the depth of the Titanic wreck (12,467Feet) is approximately 5,500 PSI (Pounds per square inch). To state the obvious, that is an enormous amount and very unforgiving of any flaw / imperfection. Additional stress is added by the extreme cold temperature. It's approximately 32 degrees F / 0 degees C at the wreck. The water doesn't freeze because it is salt water.

It's actually a testament to human engineering that in all the decades that manned submersibles have been operating at extreme depths, this is the first time one has been lost. From what has been reported so far, it seems that OceanGate did not fully embrace the engineering standards / lessons that went before. The CEO has paid the ultimate price for his apparent hubris, and unfortunately has taken others along with him.


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According to an aunt, the 19 year old was terrified of the idea. But he gave in to his father, as it landed on Father's Day weekend. So sad, and unnecessary.



https://www.1news.co.nz/2023/06/23/19-year-old-titan-sub-passenger-terrified-before-trip-aunt/

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News today said the submersible imploded on Sunday at the same time contact with it ended

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Originally Posted by NoFlyBoy
News today said the submersible imploded on Sunday at the same time contact with it ended


Yes that makes sense. In other words the reason for loss of communication after 1 hour and 45 minutes was indeed the implosion. We just don't know right now what exactly caused the implosion.

Last edited by PanzerMeyer; 06/23/23 04:08 PM.

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I haven't looked through the entire thread, so apologies if this has been posted already. James Cameron talking about this, and the vehicle. For me, the most interesting part is that it seems that the deep-diving sub "community" believes they had an issue, tried to surface, and possibly imploded on the way up.

https://www.msn.com/en-us/news/worl...-the-titan/ar-AA1cUEFJ?OCID=ansmsnnews11


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Originally Posted by PanzerMeyer
Originally Posted by NoFlyBoy
News today said the submersible imploded on Sunday at the same time contact with it ended


Yes that makes sense. In other words the reason for loss of communication after 1 hour and 45 minutes was indeed the implosion. We just don't know right now what exactly caused the implosion.


aliens of the deep ! the same ones that took titanic. that was no mere iceberg ! the sounds the orion caugh were the plasma beams cavitation. there is a reason dive expeditions stay away from the starboard section that is much further away than the... the.....the otherboard part of the ship.dont forget the admiral warning in the press release. "its a HOSTILE enviroment down there" get a clue people !



i believe they didnt test intregrity enough and the material was not worth many trips like they suspected. older subs that reached that deep only did one journey because the stress was too much to risk another dive. and this was a janky one. so.......hull monitoring means nothing when implosion happens in a milisecond

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Oh please. 3700 people died in traffic accidents the day those 5 died in the sub. If adults want to risk their lives for "hobbys" it's not anyone else's place to stop them.


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Originally Posted by F4UDash4



Oh please. 3700 people died in traffic accidents the day those 5 died in the sub. If adults want to risk their lives for "hobbys" it's not anyone else's place to stop them.


Which I'm inclined to agree with. By the same token, those governments shouldn't be expected to pull out all the stops trying to find/rescue them.


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Run Silent, Run Very, Very Deep

Quote
There’s been a lot of talk and opinion. Here are my responses to some things I’ve heard. Feel free to add yours to the comments.

Take One: It’s good when a bunch of rich people die.

My Take: Really? Envy is a deadly sin and when you hate people so much that you want them dead, just for the crime of existing, that’s not admirable.

As Ben Dreyfuss notes, this sentiment is basically psychopathic:

So on Monday you probably ended up thinking about it a bit and felt sad.

I assume that is true of you because I assume you’re a normal human being. This is how people process things. It’s how normal people process things. It is unremarkable.

The thing about normal people, though, is that they aren’t all of the people. There are also other people who are not normal—Qu'est-ce que c'est: abnormal—and the thing about those people is that a lot of them are #%&*$# psychopaths. . . .

This isn’t a clinical definition or anything but one way of thinking about those people is that they actually issue stand-down orders to their empathy machine too much. In fact, their empathy machine might not even be up to code. It’s there! And it can work! They can feel empathy. It’s not a total paperweight. They can do the thing! But their protocols for when to let the mind do it are dysfunctional; in some cases, they only allow themselves to humanize people they personally know. Or people who look like them. Or people who believe the same things they believe. Their empathy machines are pathologically reinforcing the segmentations of society that undergird their moral framework.

This lack of empathy is increasingly common – and, I would argue, encouraged – by many segments of our society, particularly those that exist in what you might call the “Cultural Marxist” space. Well, anytime you find yourself in any kind of Cultural Marxist space, you’re probably at least adjacent to psychopathy.

Now there are variations on this that don’t rise to the “good, they’re dead” level. For example, “they knew it was risky and they took the risk anyway.” This is clearly true, and doesn’t necessarily indicate a lack of empathy. It might even indicate an understanding of people’s willingness to take risks to advance personal or societal horizons, which is actually a kind of empathy. The deceased aquanauts did in fact know that what they were doing was risky (more on that below) and chose to go anyway. By saying “they knew the risks,” you may also be saying that just because the press wants to make them into victims doesn’t mean that they are.

Take Two: This was criminally dangerous. It was an uncertified craft!

My take: Meh. It’s possible that they cut some corners. We’ll find out. The fact that the craft was uncertified means nothing in itself. Things that are certified crash and explode all the time. Things that are not often do fine. The certification isn’t worthless, but it’s generally some third party’s opinion that certain specified standards have been met. This might seem more compelling to those who have not been involved in the development of such standards, which is often an arbitrary, and sometimes corrupt or self-interested, process. I’m not saying that’s the case here, but it often is. At any rate, although I saw James Cameron saying that the deep-submersible biz is a mature industry, I’m not so sure. The number of operating craft is tiny worldwide, and the total number of hours of experience probably puts us about where aviation was in 1912.

I confess that I was surprised to hear that they used composite materials, since those are known more for their tensile than for their compressive strength, and are probably more prone to fatigue from repeated compression cycles than metals (which themselves can and do fatigue from that.) I think they’re more prone to “frangible” than “ductile” failures, too, though at these depths I’m not sure that matters. I’m just a law professor who has written about tech for a while, but James Cameron, who has actual experience in the field, said the same thing.

But the fact is, this wasn’t some rattletrap built in someone’s backyard. It had made numerous successful dives before. Then, for reasons we don’t know, it failed. This is cutting edge technology, and people die testing cutting edge technology. Just ask Howard “Tick” Lilly, and the numerous test pilots after him who lost their lives.

Sure, those test pilots were engaged in a risky vocation. But the Titan aquanauts were engaged in a risky avocation. As the WSJ reported, they signed very extensive waivers: “Another prior passenger, David Pogue, a CBS Sunday Morning correspondent who went on the Titan last year at the invitation of OceanGate, showed The Wall Street Journal part of the waiver he signed. It read in part: ‘This operation will be conducted inside an experimental submersible vessel that has not been approved or certified by any regulatory body,’ and later: ‘Travel in and around the vehicle could result in physical injury, disability, emotional trauma, or death.’”

OceanGate’s customers were experienced adventure travelers who had also done things like mountain climbing, Mig-25 flights to the edge of space, and the like. One of them had already gone three times deeper than the Titanic site, in the Challenger Deep. This isn’t like exposing commercial air travelers to unexpected risks. The risk, in fact, was part of the appeal.

Take Three: This stuff is wasteful, a rich man’s toy, and shouldn’t be allowed.

My take: Most cutting edge technology starts out as a rich man’s toy. Automobiles, passenger airplanes, VCRs, etc. all started out that way. Letting rich people buy the tech drives the technology and pushes prices down over time so that ordinary people can afford it. I don’t think ordinary people will ever be interested in doing miles-deep dives, but improved subsea technology is a very big deal. We often hear about how unexplored the deep ocean depths are, and there’s a reason for that – we aren’t very good at it yet. We get better at it by doing it. We can do it more if people are willing and able to pay for it.

The same is true with the various space tourism efforts. Sure, it’s mostly rich people buying a thrill. But by doing so they open up the technology for the rest of us. Unlike the test pilots, they aren’t doing it for a living; they’re doing it out of love, and even paying for the privilege. That seems commendable to me.

Take Four: We need more government regulation!!!

My take: This field has done fine without it. It’s not as if there’s been a raft of submersible-sinkings this year. In fact, disasters like this one have been vanishingly rare. Government regulation is most useful when incentives don’t match – for example, where a company’s desire to make a profit from its factory runs counter to desires that it not pollute its neighbors. But here everyone’s goals are aligned: The companies don’t want to lose a sub, and neither do the passengers. (The same alignment exists in the space tourism industry, obviously.)

And it’s not as if the number of deaths involved is particularly big. A Chicago Saturday night with only five deaths would be a triumph of nonviolence. People die every year climbing mountains, or, like John Denver, flying in experimental private aircraft. Again, we’re not talking commercial aviation here.

Claims that there should have been some sort of location-pinger are plausible, but it’s a legitimate design decision to say that if something fails, there probably won’t be any survivors to need rescuing, so a pinger is just a source of additional weight and complication. That certainly is how things worked out: Pretty much all the coulda/shoulda safety equipment stuff I heard about would have made no difference.

A Last Take: This one’s mine, not a counter-take. I was struck, at least among my circle of online and real-world acquaintances, at the gender divide. Most of the women seemed to find the story compelling, and were gripped by the thought of people trapped helplessly in a crippled vessel, hopefully awaiting rescue. The men, on the other hand, were almost universally of the opinion (which turned out to be correct) that the Titan had imploded about the time the ship lost contact and it was all over but the shouting. Maybe it’s just because the men had read a submarine novel or two, and had a firmer grip on what happens under pressure, or maybe it was some deeper difference. (The press, of course, went breathlessly with the former narrative, because otherwise there wasn’t much of a story.) Regardless, I really noticed. Even some pretty hard-boiled women I know were sucked into the story.

Anyway, those are my thoughts. Feel free to share your takes and counter-takes in the comments, and remember: If you like these essays, please consider a paid subscription.

UPDATE: My friend Jim Bennett, an early rocket-biz pioneer, writes in response to reports that OceanGate wouldn’t hire “ex-military white guys over 50” by commenting: “When I was in the rocket business we were a bunch of crazy 20s and 30s somethings. We were delighted to get some 65 and 70 year old ex-military guys working with us. We found that they were even crazier than we were and longed for the old days when good ideas hadn't been killed by timid bureaucracy. Half of the stuff they developed was put in the Pentagon warehouse along with the Lost Ark. They in turn were delighted to be with us. What we would have missed if we had been as snotty as the builders of that death trap!”


US federal spending per person per year, in constant 2025 dollars:
1925 - $153.00
2025 - $20,497.00

"In the vast library of socialist books, there’s not a single volume on how to create wealth, only how to take and “redistribute” it.” - David Horowitz (RIP)

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Think they should also make any dives on the Titanic illegal unless it's by scientists

https://www.washingtonpost.com/nation/2023/06/23/oceangate-titan-regulation-submersible-laws/

The company and the CEO is a liar and especially the CEO, he is a scammer, what my Dad used to call snake oil salesman

https://abcnews.go.com/US/company-l...s-partnerships-boeing/story?id=100256217

There are videos on Tik Tok showing the constuction of that submersible which is glued together and the CEO standing in front of it, on camera, saying how advanced and safe it is and no one has done what he is doing.

There are videos on Tik Tok showing a previous dive and not long after the submersible went underwater, someone on the mother ship reported their computer is showing there is a small water leak. Someone at the other end of the radio said something like: Okay... it's a small leak then. No big deal.

There is a video on Tik Tok showing a phone text conversation between the CEO and a customer the CEO was trying to get to sign up for a dive trip. The whole conversation read as the CEO dodging the customer's texts asking about the safety of the submersible and the CEO pushing come on, sign up, just wanting to get that $250,000.

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i disagree NFB, if it follow safety protocols lets make this a industry and use the money to advance deep dive tech, its what the CEO of ocean was trying to do but in a sketchy way, the tourist were scam to fund his RD. they were using untested materials, it should had been tested in unmaned sub, and they should had gotten a baseline certification for the sub and the new material before starting. because a new certification on every field modification is obviously unatendable, wich is why they shouldnt had been doing tourism. its not even just the sub that was the problem it is their whole operation modus.

besides its international waters, who is going to regulate that ? the only thing you can do is ban such from your country, but someone in another country will use this oportunity to set in.

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+1
Originally Posted by F4UDash4



Oh please. 3700 people died in traffic accidents the day those 5 died in the sub. If adults want to risk their lives for "hobbys" it's not anyone else's place to stop them.


+1

But when did road traffic have anything to do with subs?

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Originally Posted by CyBerkut
Originally Posted by F4UDash4



Oh please. 3700 people died in traffic accidents the day those 5 died in the sub. If adults want to risk their lives for "hobbys" it's not anyone else's place to stop them.


Which I'm inclined to agree with. By the same token, those governments shouldn't be expected to pull out all the stops trying to find/rescue them.



Fully agree.

Money wealth and power is the killer of ALL mankind,

The link i put up shows that its good they are going to shut down the company,

Whats your POINT???

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Originally Posted by Phoenix54C
Money wealth and power is the killer of ALL mankind,


screwy


US federal spending per person per year, in constant 2025 dollars:
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