Looks like The Titanic killed a few more people

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sze5003

Lifer
Aug 18, 2012
14,184
626
126
Seems like earlier there was a ship from libya to Italy with some immigrants that paid about 30k each to take the voyage for a new life in a new country which sank with 700 some passengers. I didn't see anything about it on the news and the only reason I know is because my fiance is Greek and she stays up to date on what's going on around the world in other places.

 

Zorba

Lifer
Oct 22, 1999
14,869
10,285
136
I’m not sure about that. The temperature of the compressed air would definitely increase quickly but it’s also surrounded by cold water. With a large delta T between the air and the water as the water compresses the air a lot of energy is going to transfer into the water reducing the temperature rise of the air.

Interesting thermodynamics problem.


Edit: after looking around the internet to satisfy my curiosity it looks like temperatures would spike very high very fast in the collapsing bubble only to be cooled again as the water slams into the heated area almost instantaneously.

I guess it would be like a diesel engine with water for the piston.
Yeah, adiabatic compression calcs say 2500°F. Not enough time to transfer the heat to surrounding water in that split second.
 

sdifox

No Lifer
Sep 30, 2005
96,139
15,766
126
Seems like earlier there was a ship from libya to Italy with some immigrants that paid about 30k each to take the voyage for a new life in a new country which sank with 700 some passengers. I didn't see anything about it on the news and the only reason I know is because my fiance is Greek and she stays up to date on what's going on around the world in other places.


All the animals are equal, but some animals are more equal than others.
 
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kage69

Lifer
Jul 17, 2003
28,016
38,481
136
I was just relieved to find out it was quick. Rather than something like what happened to the 3 sailors on the USS West Virginia.

The West Virginia, ugh. Up there with the Indianapolis on the horror scale. Feel free not to google those, people who don't know.

The deep keeps things far shorter, though there are exceptions. Thresher was what I was thinking of, though they didn't get to crush depth. We know from recently declassified papers that rather than all hands dying immediately like the Navy said, there was at least one survivor of the sinking who responded to rescue calls for a couple days. They had enough juice to use the main sonar to ping 37 times, somehow.
 
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amenx

Diamond Member
Dec 17, 2004
4,005
2,275
136
Wonder what other top secret tech they have.

Top Secret U.S. Navy System Heard Titan Implosion Days Ago

WASHINGTON—A top secret U.S. Navy acoustic detection system designed to spot enemy submarines first heard the Titan sub implosion hours after the submersible began its mission, officials involved in the search said...

 
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Brovane

Diamond Member
Dec 18, 2001
5,480
1,672
136
Here is what Cameron had to say, video in second post. Seems to think the carbon fiber composite delaminated under repeated stress.

I thought this part of the interview with Cameron when he talked about that they think they had dropped their descent weights and where trying to surface when the implosion had happened which indicates that their sensors had told them that there was a issue with the hull before it had imploded. Never heard that part before that they had dropped their descent weights and where in the process of surfacing when the hull imploded.

 
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Brovane

Diamond Member
Dec 18, 2001
5,480
1,672
136
Wonder what other top secret tech they have.

Top Secret U.S. Navy System Heard Titan Implosion Days Ago

WASHINGTON—A top secret U.S. Navy acoustic detection system designed to spot enemy submarines first heard the Titan sub implosion hours after the submersible began its mission, officials involved in the search said...
I wondered if SONUS had picked something up.
 

Pens1566

Lifer
Oct 11, 2005
11,806
8,380
136
Wonder what other top secret tech they have.

Top Secret U.S. Navy System Heard Titan Implosion Days Ago

WASHINGTON—A top secret U.S. Navy acoustic detection system designed to spot enemy submarines first heard the Titan sub implosion hours after the submersible began its mission, officials involved in the search said...


Wouldn't shock me at all. The N.A. probably has more sonar coverage than everywhere else on the planet combined.

And, it also explains why there wasn't a big rush from the Navy to respond. They knew it was hopeless as soon as they put 2 and 2 together.
 
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kage69

Lifer
Jul 17, 2003
28,016
38,481
136
Yeah I just can't get over that guy's bravado. Even with our Rickover inspired culture of safety, redundancy and training the US still lost a couple subs. Russia has lost what, 20?

The mockery of safety for this kind of trip is just nuts, the effects of not having that safety under the sea are usually brutal and often final.

Did they even make any unmanned trips to the bottom to validate the design first? Or was it more, "I think this is enough carbon fiber for the hull, should work. I'd test it properly but that would cost more money and we are but billionaires." "No need to speak to submariners because I have more business degrees than they do."

I still really struggle with the concept of a single chamber submarine.
 
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zinfamous

No Lifer
Jul 12, 2006
110,805
29,556
146
I recall being a little kid and being fascinated with Jacques Cousteau (RIP) and his amazing underwater explorations while staying up late with my mom to watch his TV "specials". (he was one of her heroes... mine too!)



And this was over 50 years ago!


Unregulated "tourism" like this needs to be banned considering they seem to SOMEHOW rate government assistance. Frankly I don't appreciate my tax-dollars being wasted trying to find these retards. This "accident" in retrospect was about as hard to predict as getting messed up going over Niagara Falls in a barrel and rates the same level of recovery-expense.

Indeed. I sympathize with what these people went through, but when it comes to the attitude of the CEO and this company, this shit absolutely needs to be shut down. I'm mostly annoyed that because of this piece of shit CEO, the vast resources of the coastguard and other agencies are tied up dealing with this nonsense. The government needs to haul whatever funds remain from that company to pay for this shit show.

some retired Navy officer was commenting on PBS Newshour the other night when asked about the state of this "vessel" and the company's complete disregard to safety regulations, and the officer actually seemed a bit sympathetic--the same "well, too much regulation squashes innovation!"

No, asshole. Don't be fucking stupid. I fucking hate this attitude. If we listened to such idiots, we'd still be driving leaded gasoline, dumping heavy metals all over the planet, getting 6 mpg from our 8 ton, 8L V8s, pumping out a magnificent! 125 horsepower from our shitty American engines. We'd of course call them Freedom engines, be dead last in the world in innovation, but of course consider ourselves the best anyway.
 
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Pens1566

Lifer
Oct 11, 2005
11,806
8,380
136
Yeah I just can't get over that guy's bravado. Even with our Rickover inspired culture of safety, redundancy and training the US still lost a couple subs. Russia has lost what, 20 or so?

The mockery of safety for this kind of trip is just nuts, the effects of not having enough under the sea are usually brutal and often final.

Did they even make any unmanned trips to the bottom to validate the design first? Or was it more, "I think this is enough carbon fiber for the hull, should work. I'd test it but that would cost more money and we are but billionaires." "No need to speak to submariners because I have more business degrees than they do."

I still really struggle with the concept of a single chamber submarine.

I've seen different reports on just how many dives (total) that specific craft had made before. Although I can't find ANY that were smooth without any problems.
 
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skyking

Lifer
Nov 21, 2001
22,215
5,075
146
Yeah, adiabatic compression calcs say 2500°F. Not enough time to transfer the heat to surrounding water in that split second.
here is an analogy of what happened to the air in the submersible.
We all have air compressors, and they pump the air up to about 10 Atmospheres. 150 PSI
The discharge pipe and head get plenty hot to burn you.
The air in the sub was instantly compressed to more than 300 atmospheres, and everything in it. That puts the amount of heat energy into perspective.
 

Pohemi

Diamond Member
Oct 2, 2004
9,364
12,735
146

BoomerD

No Lifer
Feb 26, 2006
63,344
11,719
136
Seems like earlier there was a ship from libya to Italy with some immigrants that paid about 30k each to take the voyage for a new life in a new country which sank with 700 some passengers. I didn't see anything about it on the news and the only reason I know is because my fiance is Greek and she stays up to date on what's going on around the world in other places.


It was all over the news...until this knocked it off the news cycle.
 

manly

Lifer
Jan 25, 2000
11,332
2,352
136
Seems like earlier there was a ship from libya to Italy with some immigrants that paid about 30k each to take the voyage for a new life in a new country which sank with 700 some passengers. I didn't see anything about it on the news and the only reason I know is because my fiance is Greek and she stays up to date on what's going on around the world in other places.

There was some reporting by the New York Times. People are not happy with how Greece handled the developing situation, seemed blasé until the ship capsized.
 

Paratus

Lifer
Jun 4, 2004
16,843
13,771
146
The West Virginia, ugh. Up there with the Indianapolis on the horror scale. Feel free not to google those, people who don't know.

The deep keeps things far shorter, though there are exceptions. Thresher was what I was thinking of, though they didn't get to crush depth. We know from recently declassified papers that rather than all hands dying immediately like the Navy said, there was at least one survivor of the sinking who responded to rescue calls for a couple days. They had enough juice to use the main sonar to ping 37 times, somehow.
Is it worse than the Byford Dolphin? (Deep sea divers decompressed from 8atm to 1 in a split second)
 
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eelw

Diamond Member
Dec 4, 1999
9,368
4,620
136
Several commented, at least it happen quickly. But if they released the counterweights to raise back to the surface, they knew something was up. James Cameron being interviewed by Anderson right now. He’s speculating that they heard the shell beginning to crumple. So while the final moment was quick, there had to be intense panic prior to that.
 
Reactions: Captante

Brovane

Diamond Member
Dec 18, 2001
5,480
1,672
136
Yeah I just can't get over that guy's bravado. Even with our Rickover inspired culture of safety, redundancy and training the US still lost a couple subs. Russia has lost what, 20?

The mockery of safety for this kind of trip is just nuts, the effects of not having that safety under the sea are usually brutal and often final.

Did they even make any unmanned trips to the bottom to validate the design first? Or was it more, "I think this is enough carbon fiber for the hull, should work. I'd test it properly but that would cost more money and we are but billionaires." "No need to speak to submariners because I have more business degrees than they do."

I still really struggle with the concept of a single chamber submarine.

During James Cameron interview he mentioned that in 5+ decades this is the first accident with a Deep Sea submergence vehicle that has resulted in loss of life. He had told people previously that he thought the use of Carbon Fiber for the pressure vessel was a recipe for disaster.
 

K1052

Elite Member
Aug 21, 2003
46,802
34,725
136
I thought this part of the interview with Cameron when he talked about that they think they had dropped their descent weights and where trying to surface when the implosion had happened which indicates that their sensors had told them that there was a issue with the hull before it had imploded. Never heard that part before that they had dropped their descent weights and where in the process of surfacing when the hull imploded.


Yeah given the depth involved here a warning that the hull is failing may only really alert you to the fact that you're probably not getting out of this alive. But that one guy knew better than literally everyone else who builds these things it seems.
 
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