Could you summarize the findings that are interesting? Not going to watch 44 minute video that might or might not be illuminating.

It's all summarized in the NTSB reports.

 

Same problem, I am not going to read 87 pages either.

Here is a summary I found. It says nothing that I didn’t already know.

 

Could you summarize the findings that are interesting? Not going to watch 44 minute video that might or might not be illuminating.

Key finding: CEO was a Jackass.

 

Key finding: CEO was a Jackass.

Far from technically precise thus zero informative.

 

Not to be morbid ... but I wonder what happens to the human body when it's subjected to such an abrupt high pressure, and then to the remains when they're recovered and brought to the surface ... I can imagine, though. Forensics must have had a rather unusual experience that day ...

 

Not to be morbid ... but I wonder what happens to human the human body when it's subjected to such an abrupt high pressure...

Burnt tomato soup comes to mind.

 

Not to be morbid ... but I wonder what happens to human the human body when it's subjected to such an abrupt high pressure, and then to the remains when they're recovered and brought to the surface ... I can imagine, though. Forensics must have had a rather unusual experience that day ...

Well lets see:
The Titanic wreckage lies at a depth of about 3,800 meters (12,500 feet). At that depth, the pressure is an astonishing 380 atmospheres, or about 5,600 psi

My best guess is you become very small.

Sadly, there was also the USS Thresher an entire submarine and crew lost. A simple Google of USS Thresher will bring up the whole story. Thresher was to be the first in its class, the Thresher Class which for obvious reasons never happened.

Ron

 

My best guess is you become very small.

Good guess ... probably starting with the eyeballs, then the abdomen, and then the brain is compressed into the size of a hazelnut after water rushes breaking through the eye sockets, and also through the ears and the upper palate ... after that, probably your once robust body ends up looking like a scarecrow.

And then there's the matter of the extreme heat generated by the pressure shock. Although probably the skin doesn't really have time enough to burn since all that water at a low temperature is extremely efficient at dissipating all the generated heat.

After that, my guess is that the high pressure water seeps into the body's tissues (and the individual cells, possibly through osmosis) and the body more or less recovers its former dimensions (though not its former appearance) ... I'd rather not get into discussing what things would have probably looked like after the remains were brought to the surface.

 

Good guess ... probably starting with the eyeballs, then the abdomen, and then the brain is compressed into the size of a hazelnut after water rushes breaking through the eye sockets, and also through the ears and the upper palate ... after that, probably your once robust body ends up looking like a scarecrow.

And then there's the matter of the extreme heat generated by the pressure shock. Although probably the skin doesn't really have time enough to burn since all that water at a low temperature is extremely efficient at dissipating all the generated heat.

After that, my guess is that the high pressure water seeps into the body's tissues (and the individual cells, possibly through osmosis) and the body more or less recovers its former dimensions (though not its former appearance) ... I'd rather not get into discussing what things would have probably looked like after the remains were brought to the surface.

Yep, just imagine being squooshed by the weight of a dozen Airbus A380's.

The thing that really gets me is the fact that the guy used carbon fiber in the body. That whole structure should have been metal!

 

Well lets see:
The Titanic wreckage lies at a depth of about 3,800 meters (12,500 feet). At that depth, the pressure is an astonishing 380 atmospheres, or about 5,600 psi

My best guess is you become very small.

Sadly, there was also the USS Thresher an entire submarine and crew lost. A simple Google of USS Thresher will bring up the whole story. Thresher was to be the first in its class, the Thresher Class which for obvious reasons never happened.

Ron

Good guess ... probably starting with the eyeballs, then the abdomen, and then the brain is compressed into the size of a hazelnut after water rushes breaking through the eye sockets, and also through the ears and the upper palate ... after that, probably your once robust body ends up looking like a scarecrow.

And then there's the matter of the extreme heat generated by the pressure shock. Although probably the skin doesn't really have time enough to burn since all that water at a low temperature is extremely efficient at dissipating all the generated heat.

After that, my guess is that the high pressure water seeps into the body's tissues (and the individual cells, possibly through osmosis) and the body more or less recovers its former dimensions (though not its former appearance) ... I'd rather not get into discussing what things would have probably looked like after the remains were brought to the surface.

The compression effect on things that aren't gas filled is pretty small, so eyeballs (which are filled with a saline solution) won't compress much. The same for the limbs. The chest and torso will crush, but only so far as the mass of the organs will limit it.

But before any of that happens, they will be incinerated as the air in the containing space is compressed rapidly (in the case of a catastrophic failure as opposed to a slower leak) and heats adiabatically. I don't know to what degree the small volume of this submersible limits this effect, but the Navy has done tests with instrumentation to understand the effects in larger vessels, Objects are incinerated ahead of the advancing water amazingly quickly.

 

Yes, if compression was the only issue, it would have little effect. Compression of the wet parts of your body is less than 5%. That is, water is ~5% denser under that sort of pressure. That's likely fatal - imagine your brain being squished 5% - but not devastating to your general structure. Your eardrums are gone and your lungs are collapsed, but that's minor to your structure.

The issue for the forensics is the mass of water and machine coming at your body at 6000psi or whatever it was. Like thousands of rifle bullets from all directions. Ever see a water jet cutting through steel?

 

Ever see a water jet cutting through steel?

I designed and built a water jet cutting machine about 20 years ago, so yeah ... I know what it can do.

As for the 5% compression, that applies to a body made entirely out of water. But there's soft tissue to consider, like fat and muscle and even cartilage. And I have no idea of how they would react. Bahn's assertion on the incinerating effects due to adiabatic compression is well documented. But considering that the implosion took effect in a couple of milliseconds, I honestly don't know how far into the body the heat would travel before being cancelled by the surrounding cold water ... maybe this case is quietly and discreetly being discussed by forensic researchers worldwide, or maybe it's being carefully studied behind closed doors. ... I have no idea

 

A few months ago I saw this interview. Very interesting.

 

Something I don't understand is his choice of material used. Then too, I am not an Oceangate Engineer, whatever that is. Much like the Thresher they ended up in Davey Jones Locker.

Ron

 

There is no sensation of pressure when scuba diving because you breath air at the same pressure as the water around you. I have dove to 105 ft, which is about 3 atmospheres (42 PSI). You really don't feel anything weird.

When coming up, which takes minutes, you have to exhale continuously, which feels very strange, but, of course, your lungs are always full without inhaling.

 

Something I don't understand is his choice of material used. Then too, I am not an Oceangate Engineer, whatever that is. Much like the Thresher they ended up in Davey Jones Locker.

Ron

That was the worst engineering decision *ever* ... one for the history books. A perfect example of seeing what one wants to see, and completely ignoring the recorded facts experience of accredited peers and institutions. One just doesn't use a fiber-anything material for compression, especially if said fibers are not completely interwoven and are simply parallel to one another. It's like adding glue to a rope and then expect it to work well as a column.

 

Something I don't understand is his choice of material used. Then too, I am not an Oceangate Engineer, whatever that is. Much like the Thresher they ended up in Davey Jones Locker.

If nothing else, the use of a $30 gamepad controller should have been a clear indicator to anyone boarding that vessel that they most likely were not dealing with professionals.

 

Hi,

Very unfortunate tragedy. It is almost unbelievable that this could happen in this day of computer modeling and such, but humans will be human and that means making stupid decisions sometimes.

My view of extreme pressure on an asymmetrical and inhomogeneous object like the eyeball is that it would deform violently. This would be due to a pressure differential not the outside pressure itself. The water may only compress by 1 percent, but the structure holding it would break down.

The only good thing we can say about this I think is that it happened so fast that they literally had no idea it was happening.
A pseudo good thing is that this may have taught future developers to consider safety more aggressively.

It's hard to think about this, but I've also thought about the time it takes for a large jet airliner to crash into something. Given the speed of the plane could be 500 mph, how long is it between the time the nose hits until the tail hits. That's also pretty gruesome.

 

Could you summarize the findings that are interesting? Not going to watch 44 minute video that might or might not be illuminating.

It looks like they talk a lot about the previous damage to the sub that was not investigated. They had physical evidence of physical damage, yet they did not look into it. I cannot imagine why they would do something so stupid.

At one point they mention that the previous damage could have let water get into the carbon fibers in some way, and when they later had the sub in freezing temperatures the water could have expanded and damaged the hull even more before the final dive. I've seen this action outside in decking where the water gets underneath the floorboards, then when it gets freezing outside the water expands and lifts the boards up. The water melts when it gets warmer and then you can see nails sticking up from the boards after a while.

 

Burnt tomato soup comes to mind.

So everything inside could have been instantly vaporized.