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AFewBricksShy posted:This actually happened to a friend of mine when he was going for his engineering doctorate. These assholes build things like bridges?
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Jul 2, 2020 15:49
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Mustached Demon posted:These assholes build things like bridges? Yeah, I had to take an engineering ethics class and they went over a bunch of examples like this and the whole end story was 'some of you are going to be designing things that can kill people if you or someone on your teams design is flawed, you have a responsibility to speak up early and often if you discover it' Then I went on to work on targeting control radar for bombers so....
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Jul 2, 2020 16:43
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Mustached Demon posted:These assholes build things like bridges? They sure do! Too bad they fall down after a while  IMO, fresh engineers with a masters of engineering but no actual real-world experience are a danger both to themselves and everyone around them the first few years after they're done with university. Most of them realize that real world experience is worth something fairly quickly, and take advice from other, more experienced engineers even though those might only have a BsEng (like me). Some refuse, then I get to throw them under the bus 
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Jul 2, 2020 21:00
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I never could rationalize engineering risk management with being an actual human and I just touch computers instead now. The breaking point wasn't even risk related though but fits in with the whole lab results topic. Bench piloting of a chemical process left us with a half functional production unit. Bench pilot ignored some byproducts as specific to bench scale because it was just at the brink of measurable. The rate formula was made at an order ignoring that byproduct and handed off to the shed pilot. Shed pilot ignored the same products because bench team said they weren't important and it was gonna cost extra for an analysis that catches it measurable. Total blame on the bench here because it's PHD chemists telling the garage team what they should be measuring and the technical expertise is in doing it for barely no money. Scale up to production and that motherfucking byproduct is everywhere because there's so separations unit to remove it. It's pouring out of scrubbing equipment at one point and I get to justify it with the environmental guy that it's only a release when it's > 1000 lbs of uncharacterized organic and at this point we still weren't sure what it was so it was hell of uncharacterized. The old chief engineer on the production design had gotten an extra distillation column sitting in the plant on the environmental permit because he's a saintly loving boy scout who's always prepared and we piped it in over a holiday weekend. Basically let us limp with overtime till a post mortem concluded we just needed extra reactors and distillation capacity because the reaction model was hosed up. We all sat down and pulled up the concentration graph from the bench pilot and looked at a textbook example of a reaction that should have been modeled n+1 order instead of n order. I'd frame it as perfect if it wasn't my arch nemesis. I quit a month later to avoid juggling the new installation with running the thing well past flat out in the mean time.
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Jul 2, 2020 22:21
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I just thought you all needed to see these. https://twitter.com/L0ST_VEGAS/status/1278600102970458113
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Jul 3, 2020 03:00
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Just give me some that say not great not terrible
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Jul 13, 2020 10:55
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Comrade Blyatlov posted:Just give me some that say not great not terrible That's in tiny font on the front of the banana hammock/t-back panties. Bonus points 3.6/10
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Jul 31, 2020 09:26
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Y’all watching the explosions in Lebanon?
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Aug 4, 2020 19:59
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Bar Ran Dun posted:Y’all watching the explosions in Lebanon? They're pretty great. (USER WAS PUT ON PROBATION FOR THIS POST)
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Aug 4, 2020 20:07
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Midjack posted:They're pretty great. wait what the gently caress
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Aug 4, 2020 20:43
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Midjack posted:They're pretty great. Uhhhhhh
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Aug 4, 2020 20:45
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The port just blew up. It’s unclear as to the exact cause, but it’s haz related.
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Aug 4, 2020 20:51
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Early reports attributed it to a fireworks warehouse but it seems that is not the case.
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Aug 4, 2020 20:53
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It sounds like it was a fireworks warehouse that exploded and set off a nitrate fertilizer dump. 
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Aug 4, 2020 20:53
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https://twitter.com/allushiii_new/status/1290672503275356161 this shows what appear to be fireworks going off. If it was a warehouse that they stuck all of the dangerous poo poo they confiscated, that'd make all sorts of sense.
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Aug 4, 2020 21:06
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Of course there are people on twitter saying "that's a MUSHROOM CLOUD so clearly it was atomic, they're covering something up sheeple!" this is why we need science education!
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Aug 4, 2020 21:14
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USGS has a magnitude of 3.3 - that's PEPCON level, so you're looking at around a kiloton yield equivalent.
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Aug 4, 2020 21:14
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Watermelon Daiquiri posted:https://twitter.com/allushiii_new/status/1290672503275356161 Fireworks or small arms munitions cooking off.
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Aug 4, 2020 21:15
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The initial fire appears to be fireworks. Initial reports claim the next warehouse over housed a large amount of Collateral Damage has a new favorite as of 22:09 on Aug 4, 2020 |
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Aug 4, 2020 21:25
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https://twitter.com/HachemYassin/status/1290702640930791424?s=20
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Aug 4, 2020 21:30
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The big white building you can see in some of the videos is also apparently a grain silo, no idea if that helped it go boom even bigger
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Aug 4, 2020 21:52
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Plinkey posted:The big white building you can see in some of the videos is also apparently a grain silo, no idea if that helped it go boom even bigger
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Aug 4, 2020 21:59
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Jeez, I hope the guy who took that video is okay. That was one hell of a shockwave.
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Aug 4, 2020 22:00
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There are still reporters confusing sodium and ammonium. It's frustrating.
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Aug 4, 2020 22:02
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Blue Footed Booby posted:There are still reporters confusing sodium and ammonium. It's frustrating. it's made a very convincing statement which of the two it is
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Aug 4, 2020 22:04
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That must've been one grumpy boat crew. "WHADDYA MEAN WE CAN'T SMOKE?!?!?!?!"
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Aug 4, 2020 22:19
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Kwyndig posted:Jeez, I hope the guy who took that video is okay. That was one hell of a shockwave. I would be surprised if he has any worries now.
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Aug 4, 2020 22:23
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Does anyone know how the explosive yield of ANFO compares to TNT? I don't but if it had 2700t available this has gotta be approaching tacnuke yield, right?
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Aug 4, 2020 22:39
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Kwyndig posted:Jeez, I hope the guy who took that video is okay. That was one hell of a shockwave.
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Aug 4, 2020 22:46
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Comrade Blyatlov posted:Does anyone know how the explosive yield of ANFO compares to TNT? I don't but if it had 2700t available this has gotta be approaching tacnuke yield, right? It wasn't 2750t of ANFO, though, right? It was ammonium nitrate. It still needs a fuel to make it "ANFO". Regardless, 2700t of ammonium nitrate going off, while obviously spectacularly bad, is nothing like 2700t of military high explosive. Its det vel (as stated on wikipedia) is only 2,500 m/s. Compare to 6,900 m/s for TNT (also via wikipedia).
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Aug 4, 2020 22:59
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Comrade Blyatlov posted:Does anyone know how the explosive yield of ANFO compares to TNT? I don't but if it had 2700t available this has gotta be approaching tacnuke yield, right? IIRC it's about a 0.45 relative effectiveness for plain AN (0.75 for ANFO), so 2.7kt of AN is 1.2 kt of TNT equivalent. 
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Aug 4, 2020 23:03
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pmchem posted:It wasn't 2750t of ANFO, though, right? It was ammonium nitrate. It still needs a fuel to make it "ANFO". You're right, my mistake. But from the other poster, yeah... approaching small tacnuke yield. Holy gently caress.
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Aug 4, 2020 23:04
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Significantly above the yield of a small tactical nuclear weapon, actually. The smallest U.S. tactical nuclear warhead, the W54 (as used in the Davy Crockett nuclear recoilless rifle and the SADM "suitcase nuke") had a variable yield of between 0.01 and 1kt. Exploding factories and ammo dumps regularly reach into the low-yield nuclear weapon range. The Halifax Explosion, for instance, which every Canadian knows about, was roughly a 3kt equivalent. https://en.wikipedia.org/wiki/Largest_artificial_non-nuclear_explosions (Hiroshima was about 15kt, for comparison)
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Aug 4, 2020 23:14
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If this was an ammonium nitrate explosion, in whole or in part, I'm not surprised at the severity. The wikipedia list of ammonium nitrate disasters includes some of the worst industrial accidents in history, like that giant Chinese port explosion in 2015.
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Aug 4, 2020 23:20
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Comrade Blyatlov posted:Does anyone know how the explosive yield of ANFO compares to TNT? I don't but if it had 2700t available this has gotta be approaching tacnuke yield, right? Wikipedia says: "With ANFO or ammonium nitrate, they would require 1.0/0.74 (or 1.35) kg or 1.0/0.42 (or 2.38) kg, respectively." Assuming ANFO, and the full stack detonated uniformly and instantly, that's ~2.035 kilotons. Assuming Ammonium Nitrate, the figure drops to ~1.155 kilotons. So potentially anywhere around/within those figures, probably biased lower rather than higher. It's PEPCON level, but not Minor Scale level. For those who've never heard of Minor Scale: https://en.wikipedia.org/wiki/Minor_Scale And a similar/related test - note the similarity in 'look' explosion-wise with this one: https://en.wikipedia.org/wiki/Misty_Picture My guess is we've got a new #7, knocking the N1 Launch off the board: https://en.wikipedia.org/wiki/List_...ns_by_magnitude BIG HEADLINE has a new favorite as of 23:32 on Aug 4, 2020 |
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Aug 4, 2020 23:28
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Would it be right to assume that if it's just sitting somewhere in a heap it's not going to detonate the full available mass in the same way a designed bomb would?
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Aug 4, 2020 23:33
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Vando posted:Would it be right to assume that if it's just sitting somewhere in a heap it's not going to detonate the full available mass in the same way a designed bomb would? I'm no expert, but I think the key is that it was in a confined space. Even though that ship has probably ceased to exist, that little bit of confinement is probably enough to ensure most of the mass goes up all at once.
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Aug 4, 2020 23:50
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Vando posted:Would it be right to assume that if it's just sitting somewhere in a heap it's not going to detonate the full available mass in the same way a designed bomb would? It was evidently sitting in that warehouse for nearly *seven years*. I'd imagine the bulk of it had plenty of time to settle and get nice and hard-packed being that close to moisture and humidity off the water. Luneshot posted:I'm no expert, but I think the key is that it was in a confined space (a ship). Even though that ship has probably ceased to exist, that little bit of confinement is probably enough to ensure most of the mass goes up all at once. It *was* in a ship. Seven years ago. They then moved it to the warehouse immediately next to where said ship was moored. Then left it there. For nearly SEVEN loving YEARS.
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Aug 4, 2020 23:51
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BIG HEADLINE posted:It *was* in a ship. Seven years ago. They then moved it to the warehouse immediately next to where said ship was moored. Then left it there. For nearly SEVEN loving YEARS. And then thought cracking on with some welding was a really good idea, apparently? https://twitter.com/Josiensor/status/1290749177157345285
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Aug 4, 2020 23:54
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Vando posted:Would it be right to assume that if it's just sitting somewhere in a heap it's not going to detonate the full available mass in the same way a designed bomb would? some back of the envelope math says that 2700 tons of ammonium nitrate at a density of 1.2g/cc (compacted prills) would form a pile (cone) 60 feet in diameter and 60 feet tall. With a detonation velocity of 15,000ft/s, the shockwave would travel through the entire pile in under 4 milliseconds. It's all going up at once. Sagebrush has a new favorite as of 00:06 on Aug 5, 2020 |
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Aug 5, 2020 00:04
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