Here is a very rough ballpark estimate of time of Titan implosion

total dive time to Titanic 2.5 hours = 150 minutes

time of last communication w Titan 1hr 45 min = 105 minutes

Navy estimate of implosion depth = 9000 feet

9000 / 12500 = .72

.72 x 150 = 108 minutes = 1 hr 48 minutes

There was no communication at the expected next 15 minute interval at 2 hr

Even though this is very ballpark, it fits within the 15 minute window between last communication and the next missed communication

Since the support ship communicated w Titan on an acoustic system, it will be interesting to find out if the support ship heard anything at time of implosion

quote:

Originally posted by wrightd:
Bingo. He didn't know what he didn't know until ....

until he didn’t have time to learn.

The two saddest things about the whole thing: 1) He took others with him, and 2) He didn’t have a chance to see his own errors. At least the good part of number two is neither did his victims.

Looks like they have brought up some of the sub

Link

Titan submersible wreckage recovered from water after fatal implosion




Wreckage from the Titan submersible has been recovered from the ocean floor near the Titanic, following a fatal implosion which killed five people.

British adventurer Hamish Harding and father and son Shahzada and Suleman Dawood were killed on board the deep-sea vessel, alongside OceanGate Expeditions’ chief executive, Stockton Rush, and French national Paul-Henri Nargeolet.

On Wednesday pictures emerged of large pieces of debris from Titan after they were transported to shore in St John’s, Canada.

The images showed a crane unloading the wreckage from the Horizon Arctic ship in the city’s harbour.

Royal Canadian Mounted Police (RCMP) said they are looking into the five deaths.

Safety investigators from the Transportation Safety Board (TSB) of Canada made inquiries on Titan’s main support ship, the Polar Prince, after it docked in St John’s harbour on Saturday.

The Titan submersible lost contact with tour operator OceanGate Expeditions an hour and 45 minutes into the two-hour descent to the wreckage, with the vessel reported missing eight hours after communication was lost.

https://www.sfgate.com/news/wo...4.php#photo-23982517

ST. JOHN'S, Newfoundland (AP) — A ship that had been searching for the ill-fated Titan submersible is back in port in St. John’s, Newfoundland, Wednesday, with debris from the destroyed vessel.

The Canadian-flagged Horizon Arctic carried a remotely operated vehicle, or ROV, that searched the ocean floor not far from the wreck of the Titanic, about 700 kilometers (435 miles) south of Newfoundland.

The owners of the ROV, U.S.-based Pelagic Research Services, confirmed that its team has successfully completed offshore operations.

The company said it is removing its equipment from the Horizon Arctic after “working around the clock for 10 days.”

Photos from the wharf show what appear to be several pieces of the submersible being lifted from the ship, including the nose cone with its distinctive circular window.

If they recovered the titanium end caps, perhaps they’ll be able to see if there was any erosion in the glue line (suggesting a failure of adhesion) or, if not, maybe a sudden failure of the cf cylinder itself. TBD.

We now have DNA tech and 3D printers ... maybe they can go Fifth Element on the victims and turn them back into survivors... Paging Luc Besson

For all the engineers out there, just use the on-line design tool provided by CET

Yes, Believe it or not. Just a few keystrokes and it's designed

Source: https://www.compositeenergytec...er-pressure-vessels/

quote:

Originally posted by sdy:
Since the support ship communicated w Titan on an acoustic system, it will be interesting to find out if the support ship heard anything at time of implosion

They did hear a sound however, given the depths, the relative small size of Titan and the general materials (CF), what they heard, could not be verified since they did not have another ROV to 'check things out'. Their delay in request assistance will be heavily scrutinized.

Everyone thinks that an implosion for this craft is like a loud explosion or, a muffled but significant sound...it's not. Water is super dense at these depths, resulting in muffled sounds that takes calibrated instruments to hear from a distance, even if that craft is directly above. Titan was primarily made of carbon fiber, with two titanium end caps; the sound that makes is going to be significantly smaller and more dampened than a big metal submarine that implodes like the fate of USS Thresher or, USS Scorpion.

For us non CAD types does that tool mean it’s a 12 inch thick vessel? Assuming that tool is correct?

As noted in my tag line:
There are three types of mistakes; Those you learn from, those you suffer from, and those you don't survive.

Unfortunately he made the third and took people with him.

quote:

Originally posted by ChuckFinley:
We now have DNA tech and 3D printers ... maybe they can go Fifth Element on the victims and turn them back into survivors... Paging Luc Besson

If they can clone Milla Jovovich, can I have one?

quote:

Originally posted by sdy:
Photos from the wharf show what appear to be several pieces of the submersible being lifted from the ship, including the nose cone with its distinctive circular window.

Given what we've read about the probable violence of the implosion, I'm honestly surprised any of the carbon fiber pieces of those sizes remained.

I am not an intelligence officer but those pictures look to me like the equipment that is housed outside the pressure vessel under that aluminum (?) fairing material. Ie, the stuff that sheaths the outside of the vessel and makes the “tail” stern shape. Ie, not CF.

Two of the pictures above look like different angles of one the titanium rings that were glued on each end of the carbon fiber tube. Looks to be in good shape, round. None of the rest of the pictures appear to be the carbon fiber tube, but maybe parts of it are in the small bag?

None of the pictures show the end caps either. Not the ones posted above and not the ones in the linked article. The viewport was 1/3 the diameter of the end cap. The end caps were attached to the rings that were glued to the tube.

quote:

Originally posted by corsair:

quote:

Originally posted by sdy:
Since the support ship communicated w Titan on an acoustic system, it will be interesting to find out if the support ship heard anything at time of implosion

They did hear a sound however, given the depths, the relative small size of Titan and the general materials (CF), what they heard, could not be verified since they did not have another ROV to 'check things out'. .....

Wait, what? They heard a sound over the comm?
Is there a source for this?

Unless they had a high school student design some analog comm system using technology from the 1950's there would be nothing to hear since it's still a digital bit stream, just acoustic transmission of the bit stream instead of over a wire or RF. This aids in the awful signal to noise ratio of an analog systems for comm in water.

source here: https://en.wikipedia.org/wiki/...ustic_communications

But if it was some type of analog system, then this outfit really did cut corners.

I’m not certain any of those carbon fiber pieces are from the pressure hull. They appear to be from parts of the tail cone-which I surmise would not have been pressurized, and maybe not carbon fiber. It seems like only the titanium end caps, and the non-pressurized portions remain. It’s unclear to me if the viewing port is intact, but it still looked to be in place-if not intact.

Those titanium pieces look like the end “rings” that were glued to the CF tube. None of those pictures seem to show the titanium “domes” that one of which would have the view port. I see nothing like those domes or viewports in any of the posted pics. I couldn’t get the link to open so if there are more pics there I did not see them.

Nice picture but am I missing something? In that pic you can see, front to back, viewport-titanium dome-titanium ring-CF tube-titanium ring-hidden titanium dome-hidden “avionics” bay behind fairing. What else?

None of the first pics appear to show any “domes” hence no viewport either. Clearly the titanium rings and domes didn't stay together, 17 bolts notwithstanding.

^^ that picture will forever live on the internet as a meme for "about to encounter failure"