Titanic Sub missing

[spenaroo]

anyone else following this.

 

the engineering on this thing is absolutely terrifying.

using carbon fiber in the hull - without any tests for defects or cracking
using a view port rated for 1/4 of the depth planned

using flammable material's for construction

all this in a 2018 lawsuit for wrongful dismissal after they fired the guy in charge of quality after he refused to sign off in it for testing

https://www.cbsnews.com/news/titanic-submarine-oceangate-hull-safety-lawsuit/

[Marty_d]

Poor buggers are stuffed.  Even if the thing is on the surface,  the hatch is bolted from the outside.   So they will still suffocate unless found and released before the oxygen runs out.

[spenaroo]

yep,

most likely the carbon hull has imploded from fatigue, dead before the nervous system can process anything.

its one thing to make the dive once or twice... but repeatedly. 
like aircraft material fatigue is a huge issue.

[pmccarthy]

And if floating on the surface, the white hull can’t be spotted in the choppy sea.

[facthunter]

Aircraft frames get thousands of pressurisation cycle s and Hard landing s and turbulence as well.. I'm NOT suggesting this thing is well designed but it would take a while for fatigue in the normal sense to be an issue.    Nev

[Jerry_Atrick]

Are they subject to the same pressures on the hull (admittedly, I am being lazy as I haven't looked it up)?

[facthunter]

Nothing like it but the design should take that into consideration. Cycles causes fatigue  in more stressed areas. Overloads accelerate it. Big over loads cause sudden failure if beyond design parameters or the design is out.  Nev

[octave]

A space craft only needs to contain 1 atmosphere whilst the pressure under water increases by 1 atmosphere every 10 metres

[facthunter]

 A submersible designer knows exactly what pressures it will have to withstand at any selected depth It doesn't change suddenly or experience turbulence and big temperature changes either but the pressures are LARGE. Something like 150 tonnes per square inch I believe. Nev

[spacesailor]

THEY HAVE !,

HEARD TAPPING.

As in sending messages, " we're still alive " .

I hope the rescue will get them out safely. 

spacesailor

[pmccarthy]

The tapping report is absolute nonsense.

[onetrack]

I'm with Marty, these blokes are stuffed. The chances of finding the submersible before they run out of air are virtually nil, and if they do, then they have to try and recover the thing and rescue the blokes!

And what insanity drove the idea of bolting the hatch on from the outside, with no way for the occupants to open the thing up, if they actually reach the surface? You couldn't write a horror movie plot this bad.

[red750]

$250,000 for a ticket to death.

[willedoo]

I fail to see the attraction. Paying $250,000 and putting your life at extreme risk to see a rusty sunken boat. If anything goes wrong, it's not easy to get rescued in a 6,000 psi environment.

 

As a comparison, when the stratospheric joy flights were running, for $20,000 you got a flight to 56,000' with aerobatics on the way back down, all visas, permits, transfers, pre-flight training and health checks, professionally edited video record of the flight and hotel accommodation. See the curvature of the earth at high altitude in relative safety, and if anything does go wrong, you have a bang seat with enough oxygen to get you back to solid ground. The rusty boat just doesn't stack up.

[spenaroo]

10 hours ago, onetrack said:

I'm with Marty, these blokes are stuffed. The chances of finding the submersible before they run out of air are virtually nil, and if they do, then they have to try and recover the thing and rescue the blokes!

And what insanity drove the idea of bolting the hatch on from the outside, with no way for the occupants to open the thing up, if they actually reach the surface? You couldn't write a horror movie plot this bad.

probably the same guy that allegedly adding and EPIRB wasn't worth the extra weight.
and is on record as saying that nothing on it is certified, as certification stifles innovation and there is too much "unnecessary additions" needed to do it.

[nomadpete]

4 hours ago, spenaroo said:

probably the same guy that allegedly adding and EPIRB wasn't worth the extra weight.
and is on record as saying that nothing on it is certified, as certification stifles innovation and there is too much "unnecessary additions" needed to do it.

Might he be the type who would decide he can last five times longer if only he stops others breathing?

[facthunter]

He'd have a bit of explaining to do in those circumstances. You can only be let out from outside.  Nev

[spenaroo]

13 minutes ago, facthunter said:

He'd have a bit of explaining to do in those circumstances. You can only be let out from outside.  Nev

Wouldn't be the first murderous submarine creator when something went wrong....
 

https://en.wikipedia.org/wiki/Murder_of_Kim_Wall

[onetrack]

Their oxygen runs out at 8:00PM AEST. They're beyond saving at this point, it's just going to be a body recovery operation now.

 

That company is going to disappear under billion-dollar compensation claims, from the best lawyers billionaire families can employ.

[spacesailor]

They lost their only asset.

  Bankruptcy next.

SO no payout there .

spacesailor

[spenaroo]

And its gone...
confirmed implosion, found the debris field.

[red750]

No surprise there.

[willedoo]

It sounds like the sub was a disaster waiting to happen. A bit of a rough show; the ballast was building site waste material balanced on outer pylons. To release the ballast, the crew all move to one side so the weight falls off. No seats or toilet facilities, just sit on the floor.

[Marty_d]

Reporting is that there were concerns about the vehicle's safety from experts in the field.

 

I'm not sure how you create a pressure vessel out of carbon fibre cylinder capped with steel hemispheres at each end and not have weak spots where the different materials join, when you're facing massive external pressure.

 

Surely the best design would be a steel sphere with no external windows?

[onetrack]

The simple problem was the designer was a "rip-tear-bust" merchant who wasn't prepared to submit his design for any independent oversight or classification by marine experts or agencies.

 

There's plenty of good reasons why stuff that goes in the water, or under the water, all have a plethora of construction rules, codes, classifications, etc - so the design can be thoroughly checked out and approved.

 

What a bloody waste of multiple-skilled, highly-qualified lives, and multiple millions in the whole exercise, including the SAR efforts.