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Moist von Lipwig posted:Hahaha the more I look at it the more confused I get Also look to the far right for diagonal nails driven into (possibly rotting) ends.
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Jul 21, 2017 15:36
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Ambaire posted:I wonder... if they had the right lenses so the beam stayed the same diameter for a few hundred meters, could you cut steel apart at 100m (500m, 1km+ even maybe?) as easily as at the distances shown in the video? Although I suppose that's the basics behind the 747 mounted icbm killer laser... Fun stuff. No such lens. In the far field lasers diverge as the inverse square just like isotropic EM sources do. The point of the lens is to focus the beam at the distance of what you're trying to hit, keeping the beam from diverging is a physical impossibility; you would need an infinitely-wide lens to do that.
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Jul 21, 2017 15:47
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ammonium nitrate lmao
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Jul 21, 2017 16:28
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So i know it was 2 pages ago but that factory with the white hot metal shooting out of the machine. How the gently caress do you clean something like that up? Like, would you stop it and then try to remove the metal while it's still hot, because i imagine once it starts to cool you're not getting that poo poo out of there. Like that just sounds like a total nightmare in every possible way. Also that polish factory video I'm still kind of shocked by how calm everyone was about burning hot metal shooting out at unpredictable angles. Just standing way closer than I'd feel comfortable standing watching it.
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Jul 21, 2017 16:48
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SmokaDustbowl posted:ammonium nitrate lmao All airbag propellants are pretty squirrely. Sodium azide and potassium nitrate used to be common, with the potassium nitrate being present to sequester the pure sodium metal that's produced by the decomposition of the azide. There's a TRW factory in Mesa Arizona that builds airbags and that thing used to blow up on just about a yearly basis. You've got to produce a lot of gas in a hurry to inflate the bag, so it's a controlled explosion in the best of circumstances. Ammonium nitrate's demonstrably a bad choice, but that's because of how it stores and ages, not because it's explosive. Show me something that can't explode and I'll show you something that's no good for inflating airbags.
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Jul 21, 2017 16:51
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Papa Emeritus III posted:Also, I found a thingie on the woman who was scalped. I was curious about Thayer since her family's name is popular back home, and I found this: https://www.youtube.com/watch?v=pYOONJIySNE
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Jul 21, 2017 17:27
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Glagha posted:So i know it was 2 pages ago but that factory with the white hot metal shooting out of the machine. How the gently caress do you clean something like that up? Like, would you stop it and then try to remove the metal while it's still hot, because i imagine once it starts to cool you're not getting that poo poo out of there. Like that just sounds like a total nightmare in every possible way. Also that polish factory video I'm still kind of shocked by how calm everyone was about burning hot metal shooting out at unpredictable angles. Just standing way closer than I'd feel comfortable standing watching it. They're called mill cobbles, IIRC from earlier in the thread they are relatively common in continuous-rolling steel mills and the disposal strategy is chopsaw + floor crane
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Jul 21, 2017 17:36
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Arms_Akimbo posted:I had to do one of those, but I was running a tobacco store unsupervised, so I could kind of understand it. Thing is, they didn't tell me about it until I was already on the job for two weeks. I told my district manager straight up that I smoke weed after work and I'm not gonna pass it. He says he'd send back the sample empty to buy me a few weeks of "probation" to decide if he could trust me. A few months later I asked whatever happened with that drug test, and he said he just sent his hair in instead. Best boss ever. it's not that understandable for a basic-rear end retail store to do a friggin follicle test. i've had a couple of jobs in the past spring a drug test on me immediately after an interview and on one of them I just flat out said "oh I forgot that was going to be a thing, I smoked weed last weekend." and the manager was like "uh just don't smoke for a month or so and we'll set up a test for after that" and then I was never actually tested. another time i took the test expecting to fail because I didn't really want the job anyways, so i got a call from the manager a week later and he's like "Well we got your test results back" and I'm already talking to him on the phone with my shoulders shrugged, when he says "When can you start?". i guess a lot of places don't even test every sample? just being willing to submit to the test itself is good enough i guess one of these days I want to say "A drug test!? I can every one by sight AND taste, I'm gonna do great!" but I haven't been tested in years and years. Phanatic posted:No such lens. In the far field lasers diverge as the inverse square just like isotropic EM sources do. The point of the lens is to focus the beam at the distance of what you're trying to hit, keeping the beam from diverging is a physical impossibility; you would need an infinitely-wide lens to do that. so how far away do you think that beast could gently caress somebodies car up from? give me your best estimate please
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Jul 21, 2017 17:48
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Tumble posted:another time i took the test expecting to fail because I didn't really want the job anyways, so i got a call from the manager a week later and he's like "Well we got your test results back" and I'm already talking to him on the phone with my shoulders shrugged, when he says "When can you start?". i guess a lot of places don't even test every sample? just being willing to submit to the test itself is good enough i guess Just like the bag tests they do in stores. One time I bought some groceries and then a little while later I remembered I needed something else and ducked into a different supermarket, forgetting that I didn't have a receipt for the stuff I already had. The check out chick asked to check my bag on the way out and saw it was full of food and just went "Eh, you shop here all the time, I trust you" and that was that. She was probably supposed to escalate but clearly couldn't be bothered going through the hassle. 
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Jul 21, 2017 18:03
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Tumble posted:so how far away do you think that beast could gently caress somebodies car up from? give me your best estimate please 5 kW, maybe a mile or so?. The Navy's laser weapon system they've mounted on the USS Ponce is basically 6 COTS 5kW welding lasers mounted to converge on the same point, and that's taken down drones at distances of about a mile. You'd have to hold the beam on the car for a good long time, though. For something really useful as a weapon you need to start getting up into the 100 kilowatt range.
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Jul 21, 2017 18:04
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Phanatic posted:5 kW, maybe a mile or so?. The Navy's laser weapon system they've mounted on the USS Ponce is basically 6 COTS 5kW welding lasers mounted to converge on the same point, and that's taken down drones at distances of about a mile. You'd have to hold the beam on the car for a good long time, though. For something really useful as a weapon you need to start getting up into the 100 kilowatt range. a hand-held ray gun that could gently caress a car up from a mile away is plenty powerful enough for me and minions, i'm still in the beginning stages of being a lunatic so i'm not too picky just yet
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Jul 21, 2017 18:41
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Tumble posted:it's not that understandable for a basic-rear end retail store to do a friggin follicle test. They have a high turnover rate, by saying they do a follicle drug test they remove a portion of the more undesirable applicants before they even apply for the job.
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Jul 21, 2017 18:51
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Ambaire posted:I wonder... if they had the right lenses so the beam stayed the same diameter for a few hundred meters, could you cut steel apart at 100m (500m, 1km+ even maybe?) as easily as at the distances shown in the video? Although I suppose that's the basics behind the 747 mounted icbm killer laser... Fun stuff. Not with that kind of system. Even if you could invent some kind of optics that could maintain the beam and power level to an arbitrary distance, the beam itself doesn't do the cutting. I posted about it before quote:Relatively low-powered lasers (30W CO2 or better) can etch anodized aluminum (MacBooks, etc) and use those marking fluids to make black marks on most other metals. Both of those processes act by disrupting the surface of the material; no laser in that range has the power to actually melt metal. Maybe .001" shim stock I guess. So you can only cut things that you can reach with the air blast.
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Jul 21, 2017 18:58
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i love china http://www.miaopai.com/show/Des5ipKBoHYw9KMkG5xAUVemH7A0xZc1.html
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Jul 21, 2017 19:10
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Gravity is a harsh mistress.
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Jul 21, 2017 19:16
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Sagebrush posted:So you can only cut things that you can reach with the air blast. Plenty of cutting lasers don't operate in that fashion. They actually cut the metal using the energy of the laser itself, and the air blast (which is in a lot of cases just compressed air or nitrogen, not oxygen to react with hot steel) is just there to blast debris out of the cut. If the laser actually needs to *vaporize* the material to make a cut that takes a lot more energy than if the laser just needs to melt it so that it can be blown out with N2. It's not like oxyacetylene or something like that where the burning torch just heats the metal to the point where it can react with the oxygen blast. Reactive cutting as you describe is used for thick steel plates, but laser cutters for sheet steel, aluminum, and other materials actually just cut through the thing with the laser directly. I mean, this sure isn't relying on the air blast to cut: https://www.youtube.com/watch?v=jqzD6Hlm-V0 That's a 10-kilowatt laser at a distance of just about a mile.
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Jul 21, 2017 19:27
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Isn't that bracket supposed to be on the inside of that join? Never mind the wrong fasteners in the wrong places... Speaking of air bags, is there a reason why they're essentially using solid rocket fuel, especially now that they know it's not inert when there are vast temperature/humidity/pressure changes over a long period of time? I don't know much about gas generation, but the gas generators in motorcycle leather airbags is a liquid that converts to a solid. I don't know that much about the chemistry, unfortunately.
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Jul 21, 2017 19:39
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Dirt Road Junglist posted:Isn't that bracket supposed to be on the inside of that join? Never mind the wrong fasteners in the wrong places... Yes. Also hoping it's just a perspective issue otherwise that better be some load-bearing plywood in the bottom right corner.
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Jul 21, 2017 19:42
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Phanatic posted:Plenty of cutting lasers don't operate in that fashion. They actually cut the metal using the energy of the laser itself, and the air blast (which is in a lot of cases just compressed air or nitrogen, not oxygen to react with hot steel) is just there to blast debris out of the cut. If the laser actually needs to *vaporize* the material to make a cut that takes a lot more energy than if the laser just needs to melt it so that it can be blown out with N2. It's not like oxyacetylene or something like that where the burning torch just heats the metal to the point where it can react with the oxygen blast. Reactive cutting as you describe is used for thick steel plates, but laser cutters for sheet steel, aluminum, and other materials actually just cut through the thing with the laser directly. It's also not necessarily cutting that missile though.
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Jul 21, 2017 19:45
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Dirt Road Junglist posted:Speaking of air bags, is there a reason why they're essentially using solid rocket fuel, especially now that they know it's not inert when there are vast temperature/humidity/pressure changes over a long period of time? I don't know much about gas generation, but the gas generators in motorcycle leather airbags is a liquid that converts to a solid. I don't know that much about the chemistry, unfortunately. It's more like gunpowder than solid rocket fuel. The whole point is to liberate a lot of gas so it's stuff with a lot of nitrogen tied up in it. You have a small volume of space to store propellant that needs to turn into a large volume of gas. That implies a certain amount of energy being liberated. As far as motorcycles go, the driver of a car is enclosed in a rigid metal cage. The accelerations a motorcycle rider undergoes when he flies off his bike and starts rolling along the ground are substantially lower than the accelerations a car driver undergoes when his rigid metal cage strikes another big heavy solid object. So motorcycle leather airbags do not need to inflate as much, or as rapidly, as a car airbag, which is why some of them just rely on CO2 or argon canisters to inflate (although some also use nitrocellulose). mobby_6kl posted:It's also not necessarily cutting that missile though. Cut, burning through, whatever you want to call it. It's causing structural failure by dumping a lot of energy into a small point and causing localized heating. A pulsed laser would be doing this basically kinetically, but a CW laser is causing thermal failure of the structure. Phanatic fucked around with this message at 19:52 on Jul 21, 2017 |
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Jul 21, 2017 19:47
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wrong thread.
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Jul 21, 2017 20:13
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Phanatic posted:It's more like gunpowder than solid rocket fuel. The whole point is to liberate a lot of gas so it's stuff with a lot of nitrogen tied up in it. You have a small volume of space to store propellant that needs to turn into a large volume of gas. That implies a certain amount of energy being liberated. Perfect, exactly what I wanted to know. Thanks! Seems like finding just the right nitrogen-containing compound that's both stable in car conditions and liable to change states on a few milliseconds' notice is a chemist's nightmare. Hell, I get nervous leaving much of anything in my car when it's too hot or cold (I mean, over 100F or under 20F).
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Jul 21, 2017 21:27
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Dirt Road Junglist posted:Seems like finding just the right nitrogen-containing compound that's both stable in car conditions and liable to change states on a few milliseconds' notice is a chemist's nightmare. Hell, I get nervous leaving much of anything in my car when it's too hot or cold (I mean, over 100F or under 20F). Maybe originally, but now you just stick with the same tried & tested formula unless you’re a reckless Takata exec who wats to save a few yen per unit.
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Jul 21, 2017 21:37
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Nocheez posted:I was curious about Thayer since her family's name is popular back home, and I found this: Holy crap.  I'm still reading on the TECO accident and I think I finally have something outside of Three-Phase's posts to give me nightmares. Also, touching on the drug test discussion... I had to take one yesterday after my finger was x-rayed. I expected that.
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Jul 21, 2017 21:37
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carbon arc gouging is a lot more powerful than that laser but I guess an electrode holder doesn't look like a cool wolfenstein gun lol
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Jul 21, 2017 21:39
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Papa Emeritus III posted:Also, I found a thingie on the woman who was scalped. This happened at the rubber mill my dad worked at and he told me the whole story when I was 7 and it scares the poo poo out of me.
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Jul 21, 2017 22:02
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I will never grow my hair long, ever again. EDIT: Neither will Thayer.
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Jul 21, 2017 22:10
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Papa Emeritus III posted:I will never grow my hair long, ever again. i did that this year for giggles, grew it out like almost drat near respectable ponytail length, FL is hot. hair is hot. gently caress hair.
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Jul 21, 2017 22:13
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I had three incidents within 6 hours today. A medical treatment, a loving fire, and then a minor first aid. 
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Jul 21, 2017 22:16
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sneakyfrog posted:i did that this year for giggles, grew it out like almost drat near respectable ponytail length, FL is hot. hair is hot. gently caress hair. I basically kept my hair short in FL because of the heat. I do a short Mohawk thing. The added fuckery of long hair in a humid place like FL is the fact it gets soaked and clings to the back of your neck like some kind of sweat sponge. Ugh.
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Jul 21, 2017 22:34
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Papa Emeritus III posted:I basically kept my hair short in FL because of the heat. I do a short Mohawk thing. The added fuckery of long hair in a humid place like FL is the fact it gets soaked and clings to the back of your neck like some kind of sweat sponge. Ugh. its dreadful. my hairdresser looked at me when i went in like he was ashamed of me, didnt even ask me what i wanted and just started chopping.
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Jul 21, 2017 22:44
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Phanatic posted:Plenty of cutting lasers don't operate in that fashion. They actually cut the metal using the energy of the laser itself, and the air blast (which is in a lot of cases just compressed air or nitrogen, not oxygen to react with hot steel) is just there to blast debris out of the cut. If the laser actually needs to *vaporize* the material to make a cut that takes a lot more energy than if the laser just needs to melt it so that it can be blown out with N2. It's not like oxyacetylene or something like that where the burning torch just heats the metal to the point where it can react with the oxygen blast. Reactive cutting as you describe is used for thick steel plates, but laser cutters for sheet steel, aluminum, and other materials actually just cut through the thing with the laser directly. Yes, I mentioned laser-cutting of aluminum using an inert air blast in my post. The point was that, unless you have so much power in the beam that the material vaporizes, you still need some kind of additional applied force to remove the molten material (or otherwise separate the pieces) and create the kerf. With a cutting torch it's the pressure of the oxygen blast, with a plasma torch or the laser cannon thing it's compressed air. With that anti-missile laser it's either aerodynamic forces, or maybe ignition of the missile's warhead or fuel. Shine a 10-kilowatt laser at an empty missile case sitting on the ground a mile away, and it might slowly collapse under its own weight, but it won't be instantly ripped to shreds or anything. If that cutting laser had no air blast, the metal in the cut zone would just be fusing back together after a few seconds. sandoz posted:carbon arc gouging is a lot more powerful than that laser but I guess an electrode holder doesn't look like a cool wolfenstein gun lol I think the point of using the laser is that it's completely non-contact -- not even a ground electrode required -- so that you can chop up radioactive materials without contaminating the cutting equipment.
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Jul 21, 2017 22:52
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Sagebrush posted:Yes, I mentioned laser-cutting of aluminum using an inert air blast in my post. The point was that, unless you have so much power in the beam that the material vaporizes, you still need some kind of additional applied force to remove the molten material (or otherwise separate the pieces) and create the kerf. With a cutting torch it's the pressure of the oxygen blast, with a plasma torch or the laser cannon thing it's compressed air. With that anti-missile laser it's either aerodynamic forces, or maybe ignition of the missile's warhead or fuel. wouldn't surprise me if heating/melting part of a missile hosed up it's aerodynamics beyond the ability of the control system to compensate
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Jul 21, 2017 23:36
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sneakyfrog posted:its dreadful. He saved your life.
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Jul 21, 2017 23:41
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Well, restaurant goons.... what happened here? --Aside from "lol china" being the obvious answer. http://www.scmp.com/news/china/society/article/2103555/least-two-killed-gas-explosions-restaurant-china "At least two people were killed and 55 injured in gas explosions at restaurant in eastern China on Friday morning, according to a news website report. Police believe the explosions were caused by gas cylinders in the restaurant. Photographs and videos from the scene show passers-by screaming and fleeing from the area."
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Jul 21, 2017 23:58
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I would guess either hotpot or "korean barbecue," meaning at least one gas-powered burner per party. I assume they store extra canisters together and employ smokers.
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Jul 22, 2017 00:10
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Jul 22, 2017 00:52
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Jul 22, 2017 01:01
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I’m the dog on the left.
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Jul 22, 2017 01:04
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Romania. Longer video with other angles. Driver was dazed but fine.
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Jul 22, 2017 01:06
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