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by angelgonzales 642 days ago
It is so rare to get in-depth FEA reports like what you’ve linked us here. Here’s what Boeing states in the report:

“ There is still detail design work that will need to be completed. However, both the C4 and C11 configurations come close to an acceptable conceptual design. A small test program would be needed to address some of the outstanding questions. Additional modeling and optimization are also needed at the detail design level. The inclusion of portals, motor attachments, tanks and other peripherals would need to be included in a final analysis. More work needs to be done to define thermal load and cure shrinkage for both the composite cylinder and for the bonded joint. This composite structure is much thicker than most of the structure currently being produced. Thermal strains may play a significant role in the design of the structure. The time required for fabrication and the extended time that the material will be at elevated temperature during cure and bonding needs to be examined. These topics were mostly avoided during the first part of the design cycle. This report describes a conceptual design and a preliminary feasibility study. The design is feasible, but will require additional work in the areas of manufacturing, cure kinetics, material allowable, assembly, and dimensional tolerance.”

In summary - even if Oceangate developed a robust design, they’d still need to manufacture the submarine. It appears they never built enough test articles to develop a baseline for robustness, because they never did destructive testing at depth with actual hardware they never knew their margins and were never able to validate their models to reality.

2 comments

>>> they never knew their margins and were never able to validate their models to reality

The fact they knew this and went ahead anyways and took six people to their graves with them is absolutely terrifying.

"At some point, safety is just pure waste."

-- Stockton Rush, OceanGate CEO.

The guy sounds like the epitome of the sociopathic CEO. Smartest guy in the room, knows better than all the trained, experienced engineers who urged caution. Too bad his passengers listened to him.

>The guy sounds like the epitome of the sociopathic CEO. Smartest guy in the room, knows better than all the trained, experienced engineers who urged caution. Too bad his passengers listened to him.

No, he doesn't sounds sociopathic at all. People who "know better" than all the specialists aren't showing a sociopathic personality trait at all. Arrogance and stupidity, perhaps, but those aren't equated with sociopathy.

A sociopathic CEO would be someone who has no empathy. There's no evidence of that here, in fact probably the opposite. Stockton was just a fool.

Seriously, people need to stop using the "sociopathic" label for everyone they don't like.

Edit: to add to this, this reminds me of young people constantly using the word "gaslighting" when they really mean "lying". People who lie to you aren't engaging in an elaborate plan to make you question your own sanity; they're just liars. Please go watch the movie before ever using the term again.

Too late to save the word "gaslight", that one has well and truly been rewritten to mean "lying to me".
Not too late by a long shot. Just keep insisting on the actual meaning; same for "terrorist", "facist", etc.
Good luck at parties....
Actually, sociopaths don’t just lack empathy, there’s actual cognitive impairment involved in terms of judging risks and outcomes.

> People with ASPD don’t care very much about other people’s well-being. They may take risks that jeopardize their own safety and others’.

https://therapist.com/personality/sociopathy/

Disregarding consequences, acting impulsively, etc are major signs. So no disregarding safety concerns and getting into an unsafe situation really is sociopathic behavior.

>So no disregarding safety concerns and getting into an unsafe situation really is sociopathic behavior.

Roughly half the US population acted exactly this way during the COVID-19 pandemic: refusing to wear masks or get vaccinations despite expert recommendations at the time. There's no way that half of a large population is sociopathic; they're just stubborn fools.

I think peoples risk tolerance is more rational than you might assume.

70+ year olds where vastly more likely to get vaccinated and use masks etc. https://usafacts.org/visualizations/covid-vaccine-tracker-st...

Younger people to it less seriously, but they also had vastly lower risks. In the US below 9,000 people under the age of 30 died out of 1.1 million and of those many had significant health issues. https://www.statista.com/statistics/1191568/reported-deaths-...

You shouldn’t expect those groups to react the same when one is facing 100x the risk of the other.

It's just part of internet slang. Everyone who does something people don't like is a sociopath. You are of course totally right.
He sounds suicidal.
A sociopath would certainly have knowingly put other people's lives at risk, but would never put his own life at risk knowingly. As sibling said, Stockton wasn't a sociopath, just a fool.
Well they did actually get to invalidate their model.