Titanic tourist sub goes missing sparking search

[Fibonacci]

The secondary explosion always occurs even when inside the volume there is just air, as an elastic response after the compression. It is an elastic bounce.
Of course, if inside the air volume there was ignitable material, a Diesel combustion occurs,

Were the oxygen cylinders being carried in the crew compartment, maybe under the floor?
That would make a considerable difference in any combustion event

 

[Jafo19D]

I have a carbon fiber mountain bike and I sometimes wonder how many years of punishment can that frame can take

 

[makar0n]

I have carbon fiber as pretty dashboard accents on my Tundra XSP-X, but that's the extent of my carbon fiber use, for just the reasons you stated. During a sailboat race in Key West while I was there, 2 boats were involved in a collision, one glass and one carbon fiber. They crushed and dumpstered the carbon fiber boat as they could never trust it again. When those boats were put int he travel lift, you'd think they were lifting an egg.

And maybe we are getting to the root of the problem here - OceanGate vehemently refused any kind of scan, going so far as to fire the one person who demanded it. And that was when the hull was new, since then it had made lots of trips, been repaired (or replaced), and given that transportation of such thing and the whole getting in/out of the water is rather not easy, probably banged here and there.

 

[Wookie]

Probably from Wiki

 

[makar0n]

Ha well, then question is what kind of tests, perhaps merely referring to the actual dives done in 2018/2019 by OceanGate. Two paragraphs above they seem to be specifically refusing any scans:

David Lochridge, the OceanGate Director of Marine Operations, inspected the Titan as it was being handed over from Engineering to Operations and filed a quality control report in January 2018 in which he stated that no non-destructive testing of the carbon fiber hull had taken place to check for voids and delaminating which could compromise the hull's strength. Instead, Lochridge was told that OceanGate would rely on the real-time acoustic monitoring system, which he felt would not warn the crew of potential failure with sufficient time to safely abort the mission and evacuate. The day after he filed his report, he was summoned to a meeting in which he was told the acrylic window was only rated to 1,300 m (4,300 ft) depth because OceanGate would not fund the design of a window rated to 4,000 m (13,000 ft). In that meeting, he reiterated his concerns and added he would refuse to allow crewed testing without a hull scan; Lochridge was dismissed from his position as a result.[32] OceanGate filed a lawsuit against Lochridge that June, accusing him of improperly sharing proprietary trade secrets and fraudulently manufacturing a reason to dismiss him. The suit was settled in November 2018.[32]

And CEO seems to have insisted that his magical acoustic detection system replaced the scan I believe.

 

[Wookie]

Ha well, then question is what kind of tests, perhaps merely referring to the actual dives done in 2018/2019 by OceanGate. Two paragraphs above they seem to be specifically refusing any scans:



And CEO seems to have insisted that his magical acoustic detection system replaced the scan I believe.

I’m all for innovation by college kids once the technology is proven by old folks with mountains of experience.

There is a reason the United States Navy uses very little carbon fiber.

 

[makar0n]

I’m all for innovation by college kids once the technology is proven by old folks with mountains of experience.

There is a reason the United States Navy uses very little carbon fiber.

Well, turns out he also had allergy to those... ("50-year-old white guys" as per Rush quote)
In other words, true "innovator" and "engineer"

 

[Gone for diving]

And CEO seems to have insisted that his magical acoustic detection system

Anyone know how this acoustic detection works? (It didn't work)

 

[Pearlman]

Ha well, then question is what kind of tests, perhaps merely referring to the actual dives done in 2018/2019 by OceanGate. Two paragraphs above they seem to be specifically refusing any scans:



And CEO seems to have insisted that his magical acoustic detection system replaced the scan I believe.

TBH I am flabbergasted that he thought once a problem was detected they would be magically transported to surface in a fraction of a second as if there was teleportation technology available. A problem detected at 1h45m more than 3km deep and they still need that 1h45m (or maybe 30minutes?) to surface while the craft continues to experience the breaking point pressures all around in the meantime…. What would be the ascent rate once ballast is dropped? I don’t know. But there must be engineering calculations by the designers?
This wasn’t an escape pod with different characteristics than the failing craft… and the CEO though a crumbling craft makes a good escape vehicle?

 

[Jafo19D]

I have to wonder how those that enabled him (co-workers, partners, attorneys) feel. Was it worth it protecting and covering his irresponsible shenanigans? What were you guys thinking when you fired the guy who voiced concerns about the safety of the sub? I guess you only thought about CYA.