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Nenonen posted:How deep? 404
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Jun 23, 2023 00:10
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Ive read claims that carbon fiber is also more suited for the exact opposite of what the sub was supposed to do: keeping a high-pressure internal atmosphere contained from a normal external atmosphere. Is that actually the case?
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Jun 23, 2023 00:11
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https://en.wikipedia.org/wiki/Fire_piston i like to think it went poof, then goo
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Jun 23, 2023 00:12
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Jun 23, 2023 00:12
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RadioPassive posted:https://en.wikipedia.org/wiki/Fire_piston 
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Jun 23, 2023 00:13
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funeral home DJ posted:Carbon Fiber is tough as hell for its relative weight, but its failure mode is basically "do nothing, then shatter into splinters". Planes and other poo poo that needs to be light can make good use of carbon fiber, I literally don't understand why it was used in place of better metals in this sub. Forged titanium is super expensive. And the light weight meant they could do the launch and recovery "easily" from their "innovative" semi-submersible platform, rather than needing a much bigger ship with bigass cranes to lift a heavy metal-hulled sub from the water. Basically, two major ways to save money in one. Just ignore the safety specs.
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Jun 23, 2023 00:14
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funeral home DJ posted:Carbon Fiber is tough as hell for its relative weight, but its failure mode is basically "do nothing, then shatter into splinters". Planes and other poo poo that needs to be light can make good use of carbon fiber, I literally don't understand why it was used in place of better metals in this sub. It's strong and tough, the problem is that it's not a compressively strong material - It's Ultimate tensile strength can be 5 times it's compressive strength. For steels or bulk metals it's usually about the same. When you compress carbon fibres the epoxy is taking the entire compressive load, and the carbon fibres, at best, are stopping the layers from sliding. Over time they micro-buckle as individual strands are progressively overloaded and then it fails by fatigue. Composite materials like this will actually fail in compression whereas bulk metals won't (since the force pushes the fatigue cracks closed and stops them propogating). It's a terrible choice for compressive applications like this, despite being amazing for tensile ones (such as gas tanks, or plane wings, or basically anything where you can design all your forces to be pulling the carbon fibre rather than pushing, where it's really strong). The only advantage it has in this particular case it's it does have a very good strenght to weight ratio, even in compression. It's just simply not a suitable material choice though because of the inevitable fatigue risk and how it's been used.
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Jun 23, 2023 00:16
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Oh well he said its actually super safe so.
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Jun 23, 2023 00:18
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 Terrible week to announce this
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Jun 23, 2023 00:18
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Jun 23, 2023 00:21
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You can tell Bob Ballard and James Cameron are pissed as hell at this idiot for loving up their safety record.
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Jun 23, 2023 00:21
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Delthalaz posted:I want to know if OceanGate is offering refunds for the death voyage or if they’re going to be like “lol buyer beware” Just one small problem, Ben. Offer refunds to who? loving Aquaman!?
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Jun 23, 2023 00:25
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Also why does James Cameron only wear motocross gear now?
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Jun 23, 2023 00:25
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https://www.tiktok.com/embed/7246975245230427435
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Jun 23, 2023 00:25
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im not an enginer but an article i found suggested this same sub had been on possibly 2 (relatively successful) voyages to the titanic previously. how would that stress affect the materials it was made of
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Jun 23, 2023 00:26
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hooooooly fukken poo poo pisssss
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Jun 23, 2023 00:26
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Rad-daddio posted:Also why does James Cameron only wear motocross gear now? He's cool
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Jun 23, 2023 00:26
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drat you guys why does James Dean wear that really cool leather jacket even when he's not riding a motorcycle? I need somebody to explain it to me.
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Jun 23, 2023 00:26
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loving hell
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Jun 23, 2023 00:28
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CEO floats down here. 
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Jun 23, 2023 00:28
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Poor Stockton, I finally realize what must've been the last thing to go through his mind His rear end
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Jun 23, 2023 00:29
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funeral home DJ posted:Carbon Fiber is..., I literally don't understand why it was used in place of better metals in this sub. Idiot clientele don't know any better and think it sounds futuristic. E: Lmao
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Jun 23, 2023 00:30
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smoobles posted:interesting that they're called "billionaires" when they in fact have zero airs this needs more respect
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Jun 23, 2023 00:33
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So that much ballyhooed real time hull monitoring systems didn't do poo poo in the end I guess. lol
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Jun 23, 2023 00:33
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getting into the sub and having to ask if they wired up the thrusters right this time
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Jun 23, 2023 00:33
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I probably shouldn't be surprised that there are dipshits in the comments defending the company, yet somehow I still am. Especially the people responding to comments about it being unsafe with "Oh, so you're a submarine expert?  "Also I should probably stop reading about the effects of a deep sea implosion and the force of all that water, that poo poo is nightmarish, even if it's the most humane way to go down there.
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Jun 23, 2023 00:35
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TulliusCicero posted:The navy could have saved some actual alive people, and not covered some chud company's rear end for four days Hahaha how is this so hard for goons to understand. People posted graphs and poo poo and have explained it for loving pages. The timeframe between "a failure of the pressure hull has begun" and "everything inside the former pressure hull is now paste" was a few milliseconds at most. The Navy could have had a fuckin' sub right next to this thing watching out a real window rated for 4000 meters and all they'd be able to do is say "sub's there, sub's there, <blink> oops all goo!" Covering the chud company's rear end, sure, that's not great, but yeah the Navy couldn't have saved jack poo poo, the people inside changed from alive to dead faster than a blink and the only way for them not to have died was "don't get in the shittastic deathtrap you gigantic morons".
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Jun 23, 2023 00:37
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I'm watching some "analyzing The Shining"-type videos on YT at the moment, so I doubly applaud this 
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Jun 23, 2023 00:37
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Sometimes you have crab on the menu, other times the crab gets to have you on his. It's a circle of life where everything's connected, Simba.
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Jun 23, 2023 00:37
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https://twitter.com/PopCrave/status/1671991192442277889?s=20
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Jun 23, 2023 00:38
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SulfurMonoxideCute posted:Canadian search and rescue with an aircraft. They drop buoys that detect sound and they transmit that data back to the plane. Here's an video of a sonar buoy being deployed. They're pretty cool. https://www.youtube.com/watch?v=eidMDdMK38s Multiple hydrophones per buoy gives it some ability to detect directions to sound.
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Jun 23, 2023 00:38
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Stockton Rush was such a lifetime grifter that he thought the company that tested his window telling him "This will fail and kill you, redesign it and pay us again for more testing" was just trying to scam money out of him.
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Jun 23, 2023 00:39
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thathonkey posted:im not an enginer but an article i found suggested this same sub had been on possibly 2 (relatively successful) voyages to the titanic previously. how would that stress affect the materials it was made of Badly.
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Jun 23, 2023 00:39
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I mean, who really won? Us, or the iceberg we melted to poo poo? puts on sunglasses and gets in Hummer
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Jun 23, 2023 00:39
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Regalingualius posted:Ive read claims that carbon fiber is also more suited for the exact opposite of what the sub was supposed to do: keeping a high-pressure internal atmosphere contained from a normal external atmosphere. basically yes Carbon fiber tensile strength is extremely good. Pushing outward on it increases the surface area for the same amount of fiber, ie puts it under tension, which it survives better than an awful lot of things. Carbon fiber compressive strength is very bad. Pushing inward on it reduces tension and puts it under compression, whereupon it shatters and kills four people and the ceo. E: dronefragger did it better 
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Jun 23, 2023 00:40
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Very nice of the Navy to let the oxygen countdown rundown before letting us know they knew for days.
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Jun 23, 2023 00:41
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I'm really looking forward to engineer youtube doing deep dives about this incident.
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Jun 23, 2023 00:43
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EVERY TIME GOING posted:Sometimes you have crab on the menu, other times the crab gets to have you on his. It's a circle of life where everything's connected, Simba. all things must return to crab, but normally it doesn't take quite so direct a route
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Jun 23, 2023 00:43
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thathonkey posted:im not an enginer but an article i found suggested this same sub had been on possibly 2 (relatively successful) voyages to the titanic previously. how would that stress affect the materials it was made of enough that it should have been inspected meticulously and expensively I think we all know how much inspection it got
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Jun 23, 2023 00:44
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thathonkey posted:im not an enginer but an article i found suggested this same sub had been on possibly 2 (relatively successful) voyages to the titanic previously. how would that stress affect the materials it was made of Somebody should find the owner and ask
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Jun 23, 2023 00:44
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