'Cynrhia' sounds like a sexually transmitted disease

She should have mocked them for bonding titanium and carbon fibre.

Or pretty much any metal with carbon fibre.

You

Nothing wrong with bonding metal to carbon fiber, but you have to do it the right way (no idea how they did it here) and you definitely don't want to drill holes in finished carbon parts.

The whole 'expired carbon from Boeing' brag that the dead owner made is really odd because Boeing is denying any sales to this guy or the company. The mystery here is in exactly what he is talking about. Raw carbon fabric or fibers can last years if stored properly without humidity, and degrade slowly even after the expiration date. So you could realistically use slightly expired carbon material and be just fine for most applications. But prepreg or finished parts have a much shorter shelf life and are much more specialized to the application they were originally designed for. Aeronautical carbon prepreg or finished parts are not going to be remotely the same as something designed for submersion in seawater.

Carbon fiber sounds like the block chain of the engineering world.

you could say that carbon is the 'block chain' of all life forms (I don't know or care what a block chain is)

5 for the block chain of all life forms.

From my bike frame experience and talking to people who build them, the failure at the metal dropout (aluminium or titanium) the epoxy and carbon is a certainty given enough time. Add differences in thermal expansion (Carbon SHRINKS(!!) when heated and Titanium expands) and the engineering chops needed to make that work are in a league well beyond most people.

You can get extremely strong bonds between the polymers used in composites and metals, the joint can be as strong as the finished composite material or stronger.

It's true that carbon fiber material can have a negative coefficient of thermal expansion but this is almost always negated by the polymer resin matrix, and in fact the thermal stability of carbon fiber composite is one of it's most useful features. It makes it a lot easier to design large and/or intricate parts if you know that they aren't going to warp from the heat of the resin curing.

Bicycle frames are subjected to a lot of stress from every possible direction if they are used off road, possibly less so if they are for road racing. I'd think carbon composite would be much more suitable for road bikes.
One of the big weaknesses of carbon fiber material is that it is anisotropic, meaning it is stronger when stressed in some directions than in others. This can be reduced by using chopped or 'forged' carbon fibers instead of fabric, but the problem is always there. This is probably why the dropouts break free of the composite over time if I had to guess. The dropout is probably embedded in the composite and levering against it in a direction that isn't optimal for the material.

Anyway the worst case scenario crime here would be if the sub company did something psychotically irresponsible like buy some kind of finished or mostly finished carbon fiber airplane fuselage tube and then make a submarine out of it. Because of course that wouldn't work. The best case scenario is that they bought slightly expired raw carbon material from somewhere that had a very solid 9001-level inventory tracking system, and then they combined it with their own non-expired, marine grade polymers in an appropriate manufacturing process.

I bet it's some kind of alibaba airplane fuselage myself.

There was a video somewhere of them weaving the hull so it wasn't some prefab thing, although that would have been funny. This was regular rich asshole hubris, not self-styled-god-king-and-small-country-petty-dictator hubris.

That was interesting, thanks.

I think it's likely that he just grew up with extreme privilege and is consequently entitled and selfish, and is dumb and online enough to not be able to hide it.

If the stepsons TikTok is to be believed, he is broke, and without a functioning passport, take that with a grain of salt. Of course, these billionaires (and I’m sure their stepsons) lie like nobody’s business.

No, I flunked out of my engineering degree

I'm a bouncer.

Are you an engineer?

Liberal Arts.

dude just wants to meet Tom DeLonge and contract pink eye from a stripper, a true man of the people

Explorers do a lifetime of hard work that never gets more notoriety than journal publications, and a rich idiot gets all the glory for showing up once with a film crew

In this instance, the billionaire and his son were angling for membership in the relatively exclusive Explorer's Club, a fancy pants society house in New York City (and various outposts around the world), which is exactly what you think it is: a room where Scrooge McDuck and Flintheart Glomgold stand around elephant tusks on the wall and can lord their "explorer" status over the rest of us hoi polloi, who don't care.

It is absolutely possible to get an Associate Membership to the Explorer's Club, which doesn't REQUIRE any actual "exploration". The point is that these guys didn't want to be Associate Members, they wanted to be "Explorers", and Sonny-Boy was there to get that on his LinkedIn profile so he could get a bullshit billionaire "job" and TED Talks.

They died on the behalf of resume grifting.

Since the titanium bits were recovered we can safely say nothing of value was lost