Tourist submarine taking people to the site of the Titanic wreck has gone missing

Innovation (without certification) is just winging it for less cost. Rush's engineers might have had a sound design but I suspect that Ocean Gate did not perform adequate inspections on the sub after each use. Commercial airliners, for example, must undergo periodic inspections and overhauls to assure safety and to minimize the chance of catastrophic failure. I speculate that Rush found inspections, like certifications, too bothersome, costly, and harmful to profits.

This didn't age well.

Not all risks have equal chance to advance society, and this was not going to advance dick.

You have no idea what you're talking about.

Can someone explain to a dummy like me how 6000psi works under water? How come there's photos of unbroken China plates/bowls from titanic, why haven't these shattered?

There's a very small pressure differential between the top and bottom of the plate, unlike the Titan with interior pressure of around 15 psi and exterior pressure of 6000 psi, separated by a few inches of pressure hull.

It's more pressure differential that is the issue here. That china plate is feeling the pressure of the water on all sides. However, with the submersible, the inside has 14.7 PSI pushing out against 6000 PSI. If the submersible was open to the water, it would see the same pressure everywhere. It's the quick change in pressure from 14.7 to 6000 when the hull fails that causes the implosion.

You can see something like this when flying. Slightly inflate something on the ground. When you get up to altitude, it should feel like there's more air in it- obviously if you kept it sealed there is not. The cabin is pressurized to less than sea level pressure, so the pressure on the inside can push more against the inside of the balloon, making it seem more inflated.

Not really on topic but check out this crazy story.

news.yahoo.com

Undersea Miracle: How Man in Sunken Ship Survived 3 Days

Harrison Okene, the ship's cook, was in the bathroom when the boat turned over and began to sink. In the predawn darkness, Okene was tossed from the bathroom wearing only his boxer shorts. Okene was luckier than his crewmates...

Open link

Dude survived 3 days at the bottom of the ocean in his upside down boat in the dark in an air pocket.

… whoops I wasn’t done, but maybe you see where I’m going anyway. If instead of lowering the outside pressure you increase the outside pressure, the outside pressure starts to overpower the inside. If that pressure difference gets big enough, the cavity will collapse.

I think the question is more like how do china plates handle that much pressure, even from all sides. Probably because they break from fragility, not being crushed.

But it would be interesting to see them measured, maybe they are squished a bit way down there.

They probably had some basketballs aboard that were popped. But what about lacrosse balls? What would happen to a golf ball?

Never seen you say that one before.

Solid materials would compress according to their “bulk modulus.” Materials with a high bulk modulus would decrease in volume a small amount, and materials with a low bulk modulus would change in volume a lot.

Post 10 on Page 1 and he nailed it. Got more down votes than up votes too.

Let's say there was a 2nd submersible on the ship and they located the original submersible on the ocean floor. How exactly would they transfer the occupants of the first submersible to the second submersible?

They wouldn't transfer anyone. The second submersible might be able to attach a cable to the top of the first submersible that was stuck on the ocean floor. Then the first submersible could be pulled up to the surface.

Pretty good answer but I think the Titan weighs about 20,000 pounds. Do you think the 2nd submersible could lift it to the surface?

Totally agree and think of the difficulty of assessing a massive hunk of layered carbon fiber alone. Absolutely impossible. It's probably why we don't see many vessels that attempt to go this deep be built out of anything other than high strength alloy steel (or in some cases totally out of titanium) where they can use rolled plates/forging and homogenous welds to withstand pressure uniformly.

HAHAHA - and the best part is the condescending handle "Well what do you know"! Haha he knows a lot f-ing more than the guy trying to rip him!

It doesn't weigh 20,000 pounds in the water. It's much more bouyant than that.

And the first submersible had some kind of ballast attached to the bottom of it, that was supposed to be removable. So if the ballast of the first submersible was removed making it more buoyant, then possibly the second submersible would be able to bring it back up.

The other possibility was that the second submersible would hook it to a 12,000 foot cable on board the boat, and the boat's crane would pull it up. Although it turned out that the original boat didn't have a 12,000 cable on board. But another boat was scheduled to arrive with a cable that long.