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This may have already been known/discussed, but the NTSB showed that the two hulls were of completely different design: the v1 hull was monolithic (?) while the v2 hull was a series of shells bonded to each other with adhesive. Evidently these adhesive joints mostly failed during the implosion...

The NTSB has presented its materials analysis report of both Titan hulls, they tested the cut-offs as well as the wreckage. https://media.defense.gov/2024/Sep/25/2003553505/-1/-1/0/CG-107%20NTSB%20TITAN%20MATERIAL%20ANALYSIS.PDF_REDACTED.PDF

Video of the carbon fiber wreckage and domes on the seafloor has been released: https://www.youtube.com/watch?v=eEThkm0Dih8

David Lochridge (OG's former Director of Operations and author of the notorious inspection report of Titan that got him sacked) discussed this photo as it pertains to his report during today's board hearing, it's at the 1:50:37 mark of the video...

The Wired article contained another revelation about this, that the titanium domes and interface rings were not new to the second (disaster) hull, they were the same ones used with the first hull (the one from the gluing video?) How were they removed and how were the surfaces prepped? The...

Triton is quite literally in a different class than Oceangate, that's all that needs to be said. Since the vehicle is seen only in computer renderings thus far, I had wondered if anyone actually intended to place an order for one.... I suppose we now know. The idea of that giant acrylic...

I, too, thought there was something wrong about how the interface rings shattered in the simulation. I didn't look closely enough to see if the rings had their material set to Titanium or CFRP. Perhaps he set the strength of the adhesive connecting the Ti to CFRP to be far higher than it was...

I updated my cross-section of the hull based on more recent images and videos. Here it is along with some others I have seen: 1 - at top is my latest impression (I think my interface ring is slightly too wide from left to right and I don't think the bolting flanges are necessarily of different...

FEA study using Abaqus: https://youtu.be/i-bvNHCCpFo

@Brian Malone The tube certainly seems sturdy; I've wondered how it was handled after manufacture. We've seen the video of them adhering an end cap; but how did they adhere the other end cap and then flip it over? They were certainly pushing the envelope, but it seems that more funding and...

@SnTMan Would be fascinating to learn the exact procedures that were carried out, but unfortunately I am sure that the parties involved will do their best to take this information to the grave. I have been thinking about this disaster a lot; it seems that a promising avenue of submarine...

@snTMan what would be typical material/thickness for a mandrel that is intended for leaving-in-place? A removable mandrel seems very interesting, what is it coated with to prevent sticking, is the removal destructive?

That Herald article implies a very high level of collaboration between MSFC and OceanGate. Was it all complete bollocks out of Stockton's mouth? I think NASA has stated that they "consulted" on it, correct? Edit to add: if this was really all out of a single source and was not verified with...

An article from 2022 that names several companies that were involved in building the Titan's second hull (the one involved in the incident)? https://www.nwyachting.com/titan-of-industry/ All of OceanGate Inc.’s submersibles—there are currently four including Titan—are developed out of the...

>Edited to embed images Something I've been particularly interested in is the damage to the "capture rim" that is visible on the end ring being hoisted off the ship in this photo: The outer rim was almost entirely peeled away from the end ring. Very interesting failure, what does it suggest...

Regarding the manufacturing process: https://www.compositesworld.com/articles/composite-submersibles-under-pressure-in-deep-deep-waters Regarding the laying process, I have seen the below press footage of what is presumably the beginning of the manufacturing process for the hull...

Back of envelope calculation gives me 5.54 cubic meters of internal volume (work at bottom). I did not consider the height of the titanium interface rings which would give a little more L to the cylindrical volume. I also am treating the space enclosed by each end caps as being 50% of a perfect...

A Reddit user posted some very up close photos of the vehicle in 2019. The photos show the equipment configuration normally obscured by the stern fairing: Album: https://old.reddit.com/r/titanic/comments/14fexz0/my_friends_and_i_got_to_poke_around_in_the/ A battery is visible, as well as many...

https://content.govdelivery.com/accounts/USDHSCG/bulletins/3616db6 News conference will be held 3PM EST. Of all the outcomes one could hope for in a situation like this, quick and painless is the one I've been hoping for evidence of.

Jumped into the thread after a few days without checking, not disappointed: LOL