@@Imperyon It didn't fail, it did exactly what even dumb dumb Stockton knew it could possibly do. Even he knew there was a high chance of failure despite him acting cocky and sure of his equipment. He operated on pure faith not facts. When you brag about not supposed to be using carbon fiber because of tested reasons but you are saying, nope, it will hold, not only are you in denial of physics, but denial of what reality is. Guy was playing a video game with peoples lives at stake. Controller Included ...
At 4:56 a pair of dentures can be clearly seen on the rear surface of the capsule next to the ball of rope. I guess the Polygrip didn't hold this time.
The more I find out the more I am aghast at the sheer stupidity of that guy. You cannot toss out hundreds of years of sea-faring knowledge, most of which was earned via death and tragedy, and expect good things to happen. The sea will kill you if you give it a chance or dare mock it. Sometimes the sea will take you even if you are prepared and respectful. Point being you don't make light of it. Such a waste of life. I bet that guy that bailed on his seat is thankful for every morning he wakes up.
@Wannes_ they probably do the actual pmcs required to keep a carbon fiber submarine operational. The issue with oceangate is they seem to have been try7ng to squeeze profit out of this submarine to failure
Watching this all i can think about is how smug and smart Stockton thought he was. The way he talked about the titan reminded me of confidence someone has when they are scamming the hell out of people and thinks nobody is gonna stop him
That tail cone probably stayed so intact because it wasn't pressurized, right? Obviously the pressure vessel was obliterated, but it looks like the force of the implosion shot the shell away and saved it's structure.
Wow!! Good eye!! Seeing the debris and how some pieces weren't obliterated as previously thought. Originally everyone was saying with implosion, there'd be hardly anything remaining, the Titan, etc.. Makes me wonder just how long they knew of their demise, doom.
I was walking with friends a few years ago at Everett WA Marina, they were displaying this same capsule telling anyone who would listen walking by how this was going to be traveling down to the Titanic. I stuck my head into the thing, and when I see the parts, on the bottom of the ocean aside the Titanic, I'm still. disturbed. I wish very much I had taken a photo of the thing, but had no clue what would happen. I feel the most for the teenage son, have read he was very hesitant but didn't want to disappoint his dad who was taking him on the thing.
Thank you Jeff! Really can't wait for you wrapping up this story, I have followed you from almost day one and you have done an incredible job, with no bs, just considered engineering analysis. Well done and thanks for all your hard work ❤
@@jeffostroff No problem! You are the awesome one! One little favour to ask, would it be too much trouble for you to put in the same background music for your final stuff on OceanGate? would make it all tie up nicely. Thanks x x x
I still remember looking at that thing when it was strapped onto a flat deck transport truck that was parked right across the street from my house, I went over and took a picture that day of the Titan ..and remember looking at it..wondering if it was a ROV or a submarine ...i know it just looking at it, gave me this Gut feeling ...this is unsafe...anyways it left a few days later and i never saw it again ...oddly enough it arrived back on a truck bed again across the street from my house after the disaster..this time enclosed in a large shipping container in pieces..
@@jeffostroff I would but I am not actually Sure how ..to tell the truth I am new to the whole youtube posting thing ..I have tried to post a few Hunting and fishing videos but it all came out like crap so i just erased them... I must add that i did not take a picture of its return .. simply because the shipping container was closed from view ..but you could also see the large crane system that they used to retrieve the sub which was also on the trailer .. which was visible, my neighbor talked to the Truck Driver and he said that the Titan parts were in the enclosed shipping container.
The body of the sub shows the implosion was at that forward dome. The entire sub body is smashed into the rear dome. There are small pieces scattered but if you look closely you can see that the sub body simply was "sucked" back into the rear dome indicating a front ring failure. So the implosion was front to back.
Not just the sub body but the passengers too. Whatever was left of them was compressed into that debris... It's pretty eerie seeing it. I didn't know they had such high quality footage of it.
OSHA failed the people he did his best and Lockridge was bullied into silence they threatened to get him deported and bankrupt him while OSHA spent 9 months doing nothing!
I worked in composites (specifically carbon fiber) at Boeing for 30 years and I can't believe they thought that an epoxy based adhesive was going to hold that titanium to the carbon fiber under those kind of pressure loads over and over. I actually bonded carbon fiber shims to titanium wing spars on the A-6 re-wing program as a repair when the machine shop milled too much of the titanium off of the wing spars. We kind of thought that was crazy but Engineering and the Navy approved those repairs and those did last until the jets were finally retired.
The carbon fiber used in aeronautics is perfectly fine for that use. The issue is that you can't (or shouldn't) use carbon fiber for submersibles because carbon fiber excels in tension load (great for planes) but sucks in compression load (deep-sea). Also, carbon fiber will fail instantly, titanium on the other hand will give you signs of starting to break so you have time to react. Carbon fiber has porosity which isn't a big deal for a plane, but you don't really want water entering your underwater vehicle... The only reason this guy made the sub out of carbon fiber is because it was cheaper, not because it was better or a good idea. Rich guys think they are rich because they're smarter than anyone else, well here's the results of that theory.
I think the idea was the water pressure shold push the titanium dome against the carbon wall. As long as the carbon hull did not flex it should be okey. If water came into the hull the domes and window would be pushed off. If the window failed due to preassure from outside I think it would have been sent through the cabin into the rear dome and smashed or pushed it off. If the hull collapsed, the water preassere should pushed the domes off.
@@SaffronWorldCR I worked in composites for 30 years and porosity is a big deal for aircraft. All of the carbon fiber parts for aircraft has to be sealed so water doesn't penetrate the part and then freeze at altitude. I agree that money doesn't equal intelligence.
when I worked in the carbon fiber industry, I could not believe they actually wound the strands like a barrel, there is not much strength in just that single linear way, did they weave it in a diagonal way as well? which we used to do.
I'm not an engineer, just a guy with an industrial design background and even I would have walked away after hearing the plan to keep each dome attached using nothing but adhesive. I can see why they chose that route but having no additional solutions to constrain those sections is just mind blowing. You might get me to buy into a CF cylinder idea after extensive testing but certainly not in the way they're doing it. It's really sad that people lost their lives to this incompetence, regardless who they were.
I was thinking it needed a ring of titanium or 2 inside the vessel to help with pressure and certainly something better than glue or better attaching surfaces.
I always felt the adhesive failed from the hull flexing over time. At the least, this vessel should have been rebuilt xrayed and inspected after every dive.
@@PeaceMarauderAnother ring wouldn't have helped, the carbon fiber itself wasn't the issue, it was the fact that it was bonded to another material. The carbon fiber and titanium each expand and contract at different rates, and under the massive pressures they were repeatedly subjected to it took only a microscopic gap to eventually form to cause a complete decompression failure.
No reason to ever use composite, it was a stupid idea. If they had just built the whole thing from the same titanium the end caps were made up they'd all still be alive.
@@hojo70 That's not true, the carbon fiber is the issue. Numerous engineers and subject matter experts have said that carbon fiber cannot be used for this purpose. The fact there is no good way to bond the carbon fiber to the titanium end caps is just one of multiple reason carbon fiber is not suited for this purpose.
I came across your channel a while back, long before the Titan sub incident...but I'll say that of all the channels covering the Titan sub controversy, yours is the one that always keeps me captivated. I should have been in bed 30 minutes ago, but I just saw you posted this new video and I'm like nope. Grabbed me a Coke and some peanut butter crackers and imma sit here and watch this. Thank you!
I am bothering my friends and family with summaries of the Coast Guard hearings. So far, truck bed liner used to seal the hull and Stockton's hissy fit throwing the Playstation controller at Lochridge are the best. I read the threat/lawsuit that Oceangate filed against Lochridge and the best of that was page 7 when it said Lochridge mooned Tony Nissen and the engineering crew. I am hoping for more breaks during the hearings, I feel for the very pregnant Coast Guard officer. Bedtime, the hearings start at 7:15 am for me. Thank you for explaining what the debris was. I saw the clips but had no idea what I was seeing.
Now we know it probably failed from the front top or sides and imploded to the aft knocking loose the tail cone. The sub hit aft dome first and leaned over. The carbon chunks are packed to the aft. I'd love to see a new animation of this.
@PeaceMarauder it would be interesting if they replicate sub with jelly dummies same weight as passengers etc and do a dive n record implosion to see what it's like like a csi investiation or myth busters. I mean you can get idea of what happened but still hard to really think about what it was like. But ya it's interesting to see more details come out.
Navy heard the implosion but kept it a secret to not disclose ability to heard stuff over large bodies of water to enemies. The 'rescue' mission going on for days was just for show. And frankly, anyone with the slightest knowledge of diving and pressure or insight in materials used to build the sub, knew that 390+ Bars of pressure is a unforgiving environment and they were gone ! It happened so fast, their brains didn't register the event. However, they may very well have heard cracking sounds before the implosion and that must have been absolutely terrifying !
I wouldn't say it was just for show since the people searching didn't know it imploded. But while they were searching I was personally pretty surprised people thought they might still be alive...
if they didn’t want to reveal that capability why did James Cameron know about the detected implosion from an inside source within hours of the sub going missing? It was basically a twisted version of the trolley problem because they know the system isn’t 100% accurate. If they say nothing, the search goes on for a few days until it’s physically impossible for them to have survived (ran out of air). But if they say something, the rescue becomes a recovery (still spending tons of money to find the sub), and the lack of urgency/change in search method could have led to them being discovered having suffocated to death while floating at the surface with no power or coms, or entangled in some cables on the titanic that an ROV could have easily cut them free from. It wasn’t worth the risk for them to assume what they detected was 100% the titan imploding, and call off the rescue prematurely. How bad would the person who made that decision feel if they could have saved the crew in time?
@@bobbygetsbanned6049 True, I stand corrected, the searchers didn't know. It must have been pretty daunting for them to realize afterward that it was all in vain. Think of all the resources wasted and the families hoping for a miracle but being kept in the dark.
Why is no one else mentioning how the back of the submersible appears to have been held together with a common ratchet strap? You can clearly see a hardware store style ratchet strap wrapped around the back fairing. Like holy crap they used literal garbage for ballast and had it held together with the same kind of strap I use to tie my garbage down when going on a dump run.
Question from a novice, but that part wasn’t pressurized, right? Appears that the pressurized part was completely gone. Would the strap have any role other than containing parts that wouldn’t experience depth issues? I agree it looks thrown together like someone attaching a kayak to their car to head to the lake.
That strap isn't structural, Its just there to keep it in place on the substructure. I suspect they had problems attaching it due to expanding and contracting.
@bryanb6931 What I thought myself. Another one of Stocktons cop outs being cheap, the panels probably broke a latch and wouldn't hold together like it should so they pulled a MacGyver move and said get the straps!
I don't want to think this as it's awful, but my first thought on why the Coast Guard is chopping the videos into smaller parts is that there may be things we don't need to see...like body parts. It's possible there are none, or at least none that can be readily identified, but still... Out of respect for the families I can see them censoring all that out. And I can't blame them.
I think you're right. With the way the titanium dome is several feet away and the view port missing it seems likely they were pulverized and ejected in the same direction. There might be clothes or even identifiable pieces of remains they don't want included in the video.
Testimony to the USCG included the fact they used industrial bed liner to cover the carbon tube after winding, to hide the many surface defects that were visible and 'seal' it.
I am most interested in the state of the human remains. This is not out of morbid interest, but out of scientific interest. All the parts of the submersible appear pretty much how most of us anticipated, with the exception of the larger chunks than expected of carbon fiber surviving.
I would expect them to be mangled within that main chamber wreckage in the second clip, but the statements made last year specifically used the words "human remains identified on the ocean floor" which seems vague at best and misleading at most. The blue light in the water makes it impossible to notice anything that might be red in color so honestly we may be looking right at remains here and not even realize it.
Probably not too much left that would be identifiable. Humans are squishy and crunchy in terms of physical structure and the implosion would likely both shred and pulverize most of the body, both from the carbon fiber and the water coming in at an instant. Shoes, jewelry, might be the most likely to be intact. Even the Coast Guard doesn't like showing that kind of stuff to the masses.
@@hilly1122IIRC, they said that that's where they found them last year. The Coast Guard presentation said they identified genetic material consistent with each of the victims.
Most mechanical engineers know that the more junctions, joints, and sections you have the more risk of failure you get in a stress situation. And by no means a cylinder is the best shape to resist deformation from overall uniform high pressure. The face of Stockton during that inconceivable “gluing” says it all on the madness of that “engineering”.
True, it's always a sphere, perfectly round ball, used a s pressure chamber for extreme deep waters. Navy subs, which are cylinder shape, don't go anywhere near these kind of depths, I think they 'only' go to about 300 m. Biggest tragedy is that Stockton was warned repeatedly and actually took offence at his critics, who were all experts !
@@Itsallwrongbutthatsallright Indeed, and when you saw that the CF cylinder was glued to that collar circular frame, you probably had the same “wtf” questioning moment in your mind like we did. Not even mentioning the absence of structural reinforcement with the tubular cabin (although it would have made little difference at that much pressure per square cm.) Spherical is indeed the best single shape to maintain overall uniform integrity.
Jeff, the video of the assembly is not of the hull that failed. This was the first hull, which oceangate condemned. The hull that failed was made by Electroimpact, which is a serious manufacturer.
@@leftlanereiko6063The glue on the ring gave way eventually,as soon as the seal is compromised the pressure would be equalised in a fraction of a second.It imploded.
Yes that piece is the other titanium dome, you can see it clearly at 5:50 with some sand in the bottom if it (I'm not as sure this, but that looks like the one with the view port hole cut into it with sand pushing up through the hole). The two clips we got seem to imply that the back of the sub took the least amount of damage, while the front was totally destroyed. Also yes guys that work with bonding carbon fiber flipped out at the shoddy workmanship on display they were doing in the bonding (there vids on RU-vid by them talking about it). For an application like this they'd have wanted the bonding done in a sterilized clean room environment and that they'd be wearing not just rubber gloves but a full cleanroom suit.
The claim is that two dissimilar materials like titanium and carbon fibre compress at different rates, and therefore sooner or later, the rings had to pop off the cylinder.
Did you look at the sub part and aft dome? It's packed with carbon fiber chunks. The Titan failed from the front top or sides and imploded to the back. The chunks are tightly packed at the aft.
In media reports the aft dome was depicted as being retrieved in October, whereas everything else was brought up in June or July (can't remember) even though the aft dome is right there in this video. It wasn't in the well known video of the parts being brought to shore.
@@GaspardHausersProbably because the aft dome has nothing to hold onto. The front dome has the port hole, the ring is - well - a ring, the 'landing gear' and the aft section, all can be easily hoisted with a rope, whereas the aft dome is just a smooth half-sphere with nothing to grab onto and would need something like a tarp or a net that needs to go somehow underneath and I doubt this ROV, that was could've done that all by itself. Also to clarify, the dome that's sitting in the sand all by itself, that is the aft dome. It was directly glued to the carbon fiber hull. The mess with the carbon fiber, the ring and the dome, that is the front, which also means the carbon fiber held onto the ring and was removed somewhere during the recovery process. The front dome, which also was the hatch, was bolted to the ring which was glued to the carbon fiber hull.
@@Null8fuenf10 you're right. I've just been overwhelmed and surprised that they even released this video in the first place. Didn't think we'd ever see it. I didn't see anyone else mentioning the dome being brought up so much later, so thought I would. Btw, I didn't mention the aft dome being the one with the compressed mass.
@@GaspardHausers Yeah, I didn't think about the late recovery of the aft dome at all until I read Your comment lol I know, I just added it, because of the comment You replied to and also because many others (including myself at first and Jeff) think the dome, ring, carbon fiber mess is the aft portion.
That was my impression as well, PeaceMarauder... Hull crushes, front (nose) dome blows off, travels whatever distance we see there... The aft section is on the bottom, stuffed with broken up carbon fiber hull chunks....
No bodies either. Not even clothes. Thats because the implosion was so quick, and so destructive, that the crew was basically atomized to the point not even their bones survived! That is a horrifying way to go.
Im not convinced that this was the case. Too me, the parts do not look that devastated. You can see parts of the carbon fiber that are decently sized. I am no expert, but bodies are mostly water. I think there could have been body parts. Maybe they were swept away, already consumed or unrecognizably small, but I think there is a bias towards them being instantly pulverized because it seems less terrifying
@@sshreddderr9409 Agreed, I highly doubt nothing survived for the same reason. Humans can scuba dive to 900+ feet deep because we are mostly water and don't compress. If there was really nothing, not even clothes in the debris, it seems very likely that they were all pulverized and ejected out the same way the viewport and titanium ring were, but the remains were likely too small to be found on the sea floor.
Plain dome is front, port is under the sand. Back section still has the glue holding. Front was blown right off, so likely the failure point was that rear dome joint, as the imploding section would not have had much energy, but by the time the piston of water had reached the front it had enough energy to blow the front dome off, blow out the viewport, and shear off all the mounting bolts, as they are not really there for any structural use, merely to hold the front seal in position till water pressure forces it into seal properly. The rear intact says that was the top that failed, probably the back third of the carbon fibre, based on all of it being wadded up into the rear dome, and not enough energy to blow the dome off completely, but tearing the fibre mat and folding it into the rear. will be interesting to see the front dome pictures, showing how it delaminated, and yes very likely the entire epoxy ring did pop off, but the poor adhesion probably was not too much of a factor here, as even if it did fail, the force would not have popped the entire dome clean off.
Back dome was glued directly to the shell. The front dome was bolted to the glued ring. The bolts holding the front flange and forward pressure dome failed when the parts of the hull hit forward dome from behind. The rear dome completely separated from the rest of hull during the implosion.
I was thinking the opposite. The failure was at the front top or sides blowing off the dome and the view port. I'd like to see an animation with the info gathered from the pix.
@@PeaceMarauder The hull floor panel is still in place. About a third of the hull is inside the entry dome and its mating flange. It’s interesting that the carbon fibre composite failed along the length of the hull across the fibre direction when it was wound onto the hull former.
Haunting footage. I am reminded of a line from the song 'The Edmond Fitzgerald' written and performed by Gordon Lightfoot..."Where does the love of God go, when the minutes turn into hours."
Gluing two different materials like composite and titanium to withstand the pressures at the depth of the Titanic is madness without strenuous testing first.
Scott Manley did a good analysis video on the wreckage. He pointed out that all of the carbon fiber seems to have been crumbled into a ball towards the rear of the vessel when it imploded. That seems to indicate that the catastrophic failure occured somewhere in the front of the vessel. We know it's not the portal window, but it could very well be around the area where the titanium ring was connected to the front area that gave way.
Absolutely agree that what his filmed at 11:28 looks frankly like the front dome that had the acrylic viewport (the unfamous viewport rated of not even half of the depth they were going to). Another good take on this one, thanks for your work !
You can see what looks like a mesh bag that you would put styrofoam cups in to see how they shrink. We’d decorate them and put them on sample rigs that we would drop down to 1000m for CTD samples
Jesus just thinking about the moments before the implosion terrifies me. The noises it probably made as the pressure was crushing it all while in complete darkness. 😢@@edpoe1108
It really boggles the mind that a collection of pretty smart people still decided carbon fiber and glue was a safe choice for a submarine hull that was going down 370 atmospheres...
Smart is a relative term. He hired limited-experience, knowledgeable people from aerospace. That knowledge should not be all you rely on when building something that is going deep under water. Common sense says to hire knowledgeable, experienced people from the deep sea tech community, but he wasn't liking what they said about his ideas.
I've just started a new dive service to the Titanic with a submarine I built from stuff I bought at Home Depot. This will be a pay-in-advance 'Self-guided tour'. Basically, you pay me and I put you in the Sub and tell you how to operate it. Not responsible for death or injury! No refunds. Prices subject to change.
It's the forward dome, in the hearings a man explained the celan edge of the forward dome. He was sure this was the first point of failure. The window has not yet been found.
When I first saw the released footage I didn’t believe it and thought it was just another animation of how the Titan imploded, but man I feel bad for the kid, the dad, the other guy, and especially the controller. It’s surprising that the front, back, and the leg support of the Titan survived the pressure.
I know this wasnt the case, but when they were still looking and everyone hoping it was just stranded at the bottom, i had this vision of the other 4 people beating up Stockton Rush as their oxygen supply dwindled because his corner cutting cost them their lives.
that surface of the ring is the top one, conected with the end caps , which the man was wipeing with the rag. the bottom one we don't see, is U shaped.
I never expected them to have such high quality and well lit video. It's really crazy when you realize whatever was left of the passengers was likely compressed into that debris that was pushed into the titanium end cap.
When that thing imploded it was probably like cannonball shooting body parts, the acrylic glass would have shot off followed by everyone inside, gruesome but not painful
Knowing carbon fiber, I would never trust my life to carbon fiber in this type of adventure! There is a limit to epoxy. It seems reckless to trust carbon fiber to those pressures! If the carbon fiber was reinforced with titanium rings and titanium plate, it would seem like a real engineer worked on the design. This reminds me of the idea of building a complete engine from carbon fiber, until they found out what heat does to the epoxy.
5 grown men were compressed to the rear titanium dome under the carbon fiber, sadly. Remember the sub did make about 28 trips to the titanic prior to the accident. I believe the fatigue on the cabon fiber and lack of inspection is the what resulted into this accident. That sub would have been expired after 5 dives.
With these parts so tightly grouped together, I assume the accident happened fairly close to the bottom, and not several hundred metres above the floor, as it it was higher up, I’m imagining the pieces would scatter and fan out more…
@@PeaceMarauder you could very well be right. I would expect the last few moments of this situation, to be very interesting and nervous for the people riding in it. And your theory makes sense also. I do not think that no one really knows the truth of the whole sequence of events. And with this being a one of a kind accidents, I would really like to have more research and understanding at that level of pressure they talk about. That would be extremely interesting to see something like that recreated and filmed somehow, at the same depths. We are both lucky to be here wondering about it together, rather than in the submersible for the ride. Lol
6:03 The second titanium cone is clean of any carbon fiber because it's a hatch door. It was not supposed to be glued to the hull. I believe it was bolted down.
From the looks of it. It appears that the carbon fibre must have shattered under the pressure causing the tube to implode which forced the tail cone and the front dome to eject outward. Basically like squeezing a milk jug to make the cap pop off. IIRC, that the front dome was fully intact. Maybe they should have used whatever that was made of to build the rest of the sub.
@@mattymox86 The end caps on the Titan were titanium, the rest wound carbon fibre. Deep sea submersibles have used steel, aluminium and titanium for the pressure hulls successfully.
The issue was that the carbon fiber and titanium each expand and contract at different rates, and under the massive pressure that they were repeatedly subjected to it took only a microscopic gap to eventually form which caused a complete decompression failure.
@@hojo70 And not only that. You also have the limitations of each material to consider. In the case of carbon fiber, it may have high tensile strength, but it has very low flex tolerance. And thus, it tends to crack or shatter under pressure. This is why you don’t see load bearing structures or vessels being made out of carbon fiber. Stockton was a dumbass on top of being an absolute monster and a POS as a human being.
12,391 feet 4.85 inches below the glassy murky surface. Still gives me chills every time I see something like this. Reading "Ocean Gate-Titan" on the side of it, doesn't help.
Even IF the adhesive held, which I very seriously doubt, carbon fiber and titanium compress at different rates and amounts that you would think would cause the adhesive to tear from differing compressions. This is, of course, if you completely ignore the fact that carbon fiber is designed to resist EXPANSION not compression.
Great analysis, Jeff. It seems to me that the failure happened at the connection to the viewing dome. The rapid implosion would then quickly drive the afterpart (i.e., everything after the point of failure) toward the other titanium dome. That might explain why there is so much debris compressed into that dome while the other is completely devoid of any materials. Given the fact that the viewing dome was also the door, it makes me wonder whether that helped hasten the wear of that portion of the sub (and its fiber and/or connection between the titanium dome and the carbon cylinder).
In fact, I suspect that the "remains" that were found were found compressed with the rest of the wreckage into that aft titanium dome (which still had the titanium ring partially attached). Thus, everything after of the breach (which seems to have happened at the titanium viewing dome/ring connected to the fiber) imploded in the direction of that viewing dome and everything behind it in the direction of the opposite dome. I'm fairly convinced that the remains were found compressed (with the rest of the wreckage) in that opposite dome.
I believe it failed at the top front or sides of the carbon and forward ring blowing out the view port and forward dome, probably dragging the ring along which fell off at some point. I find that the bottom is intact probably from the air tanks lending extra support but now crushed into the aft section or blown out somewhere. I'd like to see a new animation using what we see now.
Got to ref a video by Dr. Chris Raynor, “Crushed, Burned or Toothpaste…”. He goes into great detail of the speed and destruction of the implosion. Well worth the watch. And thanks Jeff for this video.
At 4:53 that is indicative of a failure that began at the front of the craft. The pressure vessel collapsed towards the tail. I assume that most of the remains of whatever and whoever was inside the craft is inside that tail pressure dome. RIP.
@@PeaceMarauder And in the hull assembly video there isn’t. The rear dome didn’t have a ring - it had a recess that the hull slipped into. The front had a flange to support the forward domed hatch. You can see the hatch locking bolts in the video - they were broken by the hull fragments going through them. The hull broke by buckling from the top down (the bottom is almost intact) and the rear bulkhead rotated at about the speed of sound shearing off the attachments to the unpressurised power and support system in the aft cone. The buckled hull was then pushed into the forward hatch shearing the closure fixtures. The landing frame would either have sheared off as this happened or simply dropped as it lost power to the retention system. All this happened in less than 2milliseconds.
An Oceangate employee testified that the rings where the hull was glued to. The front ring inside tab was sheared off all the way around and the aft ring inside tab was partially sheared off. On this video at 7:09 look at the ring being taken off . The plastic covering from 350 degrees ro 300 degrees. Right under the 300 degree part looks like it's sheared there and underneath that it looks like there's more there's a weird 90 degree looks like it's purposely made like that but I don't think so
As an engineer, I would suggest that the peanut butter adhesive was more in compression than tension. It was holding rigid parts in place but not together. The incredible pressure was holding the parts together. When the rupture happened, the inside became higher pressure like a blast wave, and that is what popped the titanium ring from the very come adhesive. So, I do not think the adhesive was the point of failure. I am not sure what did go wrong, but carbon fiber is like really strong thread. It does well for tension like a space capsule, but not so much for compression like a submarine.
What in the video shows its wasnt? Everything INSIDE the capsule would have been vaporized while the carbon fiber hull would have been decimated to bits and pieces. Anything that wasnt pressurized would have remained relatively complete.
Fun facts: A book was written sometime before the actual Titanic went down. The name of that vessel in the book was Titan. Then, Titanic sank, and just over 100 years later, a little twist on the story. A submersible by the name Titan is lost just yards away from the Titanic and the name of the CEO: Stockton. Yup, Rush was related. Also, if I may add, that I thought it was the rear glued seal that was the behind the scene culprit. It acted in concert to the carbon fiber matrix. It actually appears as though the front seal may have been the one, if not both. However, it was finally the carbon fibers that lost the battle. Incredible amounts of force were involved. Physics is Physics!
