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Tourist submarine exploring Titanic wreckage disappears in Atlantic Ocean

Treefrog said:
I wonder if it what part failed. The viewing port, the carbon , the titanium hull ends, the bond between the carbon and the end pieces. Maybe some sort of pass through in the carbon?
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I've been wondering about pass-throughs and have not seen or heard anything regarding if they had any (I am suspecting not) and if they did, how they were set up. I have a feeling that the O2/scrubbers were under the floor and had separate batteries, and that command-and-control was wireless through the CF shell.
 
plym49.2 said:
And a pressure differential what – 200 times higher?
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animator said:
If I'm understanding how things work, this is also only at roughly 1 atmosphere. Multiply that by a few hundred more based on the depth at which they likely imploded and it really starts to blow the mind.
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12,500' is somewhere around 400 atmospheres.

Edit: 12,500/33 = 378.79 atmospheres.
 
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nahmus said:
Completely guessing and making wild assumptions here.

I can't find how many times this sub made that journey but do you think that wear and tear on the sub from going up and down played a factor and that nobody caught it?
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Fuck yeah. Shit was glued together. With no NDT testing as far as we know - either during assembly or ever after.
 
1687472180225.jpeg


should have brought a copy
they have all the codes to keep you from dying on the lard levels
 
Thatg9659 said:
The 86% of the body that is water would also be compressed just like all the water around it, not just the gasses in the body, solids would compress also.

It's the real quick thing that gets me.
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though the water in the body will compress as well do to pressure, it would have very little effect, it would be less than a 2% change in volume.

the gasses in the body on the other hand would drop to less than 1% of the original volume at that pressure
 
nahmus said:
Completely guessing and making wild assumptions here.

I can't find how many times this sub made that journey but do you think that wear and tear on the sub from going up and down played a factor and that nobody caught it?
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I would almost guarantee it. Just like how metal fatigue and stress fractures show up and have to be inspected for, I'd think a few trips down to those kinds of depths would put enough stress on that sub to weaken it, especially given the experimental CF construction. That company doesn't strike me as having done much tests to destruction, but more or less went "well it's worked the last few times, it'll work again" and it worked until it didn't.
 
nahmus said:
Completely guessing and making wild assumptions here.

I can't find how many times this sub made that journey but do you think that wear and tear on the sub from going up and down played a factor and that nobody caught it?
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Supposedly 3 times a year beginning in 2021. So 6 or 7 before this time
 
Poke said:
Roughly 6,000 psi?
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Multiply the depth in feet by .445 to get the exact psi at that depth. Just figuring half the depth is pretty close.



Southernfriedcj8 said:
If I was a billionaire, and I wanted to see the Titanic, I would book a trip in this: DSV Limiting Factor - Wikipedia
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Impressive. Says it has DNV certification. DNV does not fuck around and you're dealing with them starting at the design phase.

Most of the SAT diving systems I work on are DNV certified.



Norm said:
Scuba diving they play games with water bottles or balloons to show you pressure changes at depth. fill a balloon with a little air at 60 feet, then watch it get really big as it comes up. Max depth for recreational diving is 130 feet, open water certification gets you 60 feet, advanced certs gets you 100 feet, speciality deep dive gets you 130 feet. Beyond 130 feet your on your own and better know exactly what your doing plus run mixed gas like helium.

For every 33 feet (10.06 meters) you go down, the pressure increases by one atmosphere. One atmosphere is equal to the weight of the earth's atmosphere at sea level, about 14.6 pounds per square inch. If you are at sea level, each square inch of your surface is subjected to a force of 14.6 pounds. The pressure increases about one atmosphere for every 10 meters of water depth.
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Hang on there scuba guy:flipoff2:

1 atmosphere in feet is 14.7psi and 1 atmosphere in meters is 14.5psi or 1Bar.

Don't use what seems like a short cut that can kind of work for both. Because it's wrong for both. Do your math right.
 
What length of carbon fiber is needed (I don't know its thickness, maybe y'all have an idea) to wind a 5" thick cylinder 6 feet in diameter and 8 feet long?

And would it be autoclaved in stages as the thickness increased, or all at once? Can you autoclave a CF part that thick?
 
Thatg9659 said:
The 86% of the body that is water would also be compressed just like all the water around it, not just the gasses in the body, solids would compress also.

It's the real quick thing that gets me.
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Yep, it would be compressed. And it would lose 1.8% of its volume from going from 1 atmosphere to 400 atmospheres. The liquid parts are affected, just not nearly as dramatically as the gas parts.


Edit: shit, I was WAY late on this. I was viewing the wrong page and didn’t see the prior response.
 
Purevil71 said:
If they would have only had some old white guys who knew what the hell they were doing on staff, this might have been avoidable. But that would have been boring.
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Every other sub on Earth had a bunch of 50 year old white guys behind the design and construction.
Look how rare sub accidents are, year after year.

Go woke and choke?

"Honey I shrunk myself!"
 
gt1guy said:
Impressive. Says it has DNV certification. DNV does not fuck around and you're dealing with them starting at the design phase.

Most of the SAT diving systems I work on are DNV certified.
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I was reading the story on that one. Sounds like he did it right, he went to a company who builds mini subs and they built that one with the intention of it being a prototype for a new class of small commercial deep subs, apparently he wanted to build without windows/viewports and they insisted on them so that they could sell them commercially with the same design.

Aaron Z
 
Yota Up said:
Every other sub on Earth had a bunch of 50 year old white guys behind the design and construction.
Look how rare sub accidents are, year after year.

Go woke and choke?

"Honey I shrunk myself!"
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Go Woke and Implode...
 
nahmus said:
Completely guessing and making wild assumptions here.

I can't find how many times this sub made that journey but do you think that wear and tear on the sub from going up and down played a factor and that nobody caught it?
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All depends on how well/precise the CF was laid out.

I'm going to WAG and say the CF layers were all laid by hand or near that; all 5 inch thickness of it.
Any errors during it's long tedious process can cause failure.
 
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