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Sagebrush posted:Is there any more info about this one? Good russian airline landing imo
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Dec 16, 2020 00:34
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Sagebrush posted:Is there any more info about this one? quote:A passenger on a flight from Kosovo to Switzerland has captured the moment a plane hit a severe pocket of turbulence.
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Dec 16, 2020 00:40
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This is a problem for a couple of mines I've been to where they have a lot of pyrite in their ore. The pyrite breaks down in the stockpiles, and as it breaks down it releases sulphur, hydrogen and heat. So you dig into it, and you expose all those very flammable things to oxygen and they spontaneously combust. I'm not sure that's what is exactly happening here, but it certainly does happen.
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Dec 16, 2020 00:44
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Sagebrush posted:Is there any more info about this one? Maybe a cheap tourist bus on the run from Washington DC to NYC
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Dec 16, 2020 01:03
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Memento posted:This is a problem for a couple of mines I've been to where they have a lot of pyrite in their ore. The pyrite breaks down in the stockpiles, and as it breaks down it releases sulphur, hydrogen and heat. So you dig into it, and you expose all those very flammable things to oxygen and they spontaneously combust. They’re resurrecting Ragnoras. 
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Dec 16, 2020 01:19
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For those worried about turbulence, only *one* plane as ever been known to been lost due to turbulence damaging the plane in any way, and that was because of the plane deliberately flying into the restricted airspace around Mt Fuji, where von karmen vortex streets routinely form which are extremely dangerous to aircraft if you fly into them. Planes are built to a ridiculous factor of safety. You're more like to die driving to the airport than you are on the plane itself.
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Dec 16, 2020 01:22
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on that note whenever there's a big storm you should go to https://www.aviationweather.gov/airep and scroll around on the map until you find some angry looking red arrows and read the PIREPs -- pilot reports filed by aircraft about weather conditions they are experiencing. usually they're just regular /TB MOD-SEV/IC RIME turbulence and icing reports kind of stuff but once in a while you get a good one https://twitter.com/NWSAWC/status/969572219977457665
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Dec 16, 2020 01:32
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Drone_Fragger posted:For those worried about turbulence, only *one* plane as ever been known to been lost due to turbulence damaging the plane in any way, and that was because of the plane deliberately flying into the restricted airspace around Mt Fuji, where von karmen vortex streets routinely form which are extremely dangerous to aircraft if you fly into them. Planes are built to a ridiculous factor of safety. You're more like to die driving to the airport than you are on the plane itself. Releated, here's a 777 wing stress test 
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Dec 16, 2020 01:35
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Drone_Fragger posted:von karmen vortex streets https://www.youtube.com/watch?v=Eh_vOcXazaU
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Dec 16, 2020 01:35
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https://i.imgur.com/NO7QqrM.mp4
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Dec 16, 2020 03:26
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2020 mobile
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Dec 16, 2020 03:39
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Cthulu Carl posted:Releated, here's a 777 wing stress test How many cycles do they run that for? For some medical implants, they're stress tested for the equivalent of 10-15 years (the testing is sped up to ~40-60Hz, which is not realistic, but is far more aggressive than normal conditions).
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Dec 16, 2020 04:20
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I hate it when I dig up a fire ant nest.
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Dec 16, 2020 04:22
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Dirk the Average posted:How many cycles do they run that for? Well so far it’s quite a few and I don’t see any indication it’s stopping soon.
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Dec 16, 2020 04:35
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Cthulu Carl posted:Releated, here's a 777 wing stress test Dirk the Average posted:How many cycles do they run that for? For some medical implants, they're stress tested for the equivalent of 10-15 years (the testing is sped up to ~40-60Hz, which is not realistic, but is far more aggressive than normal conditions). I dont know this for sure, never been part of one, but that gif looks to me like rigging/displacement for a static test. That wing may just be getting tested to failure and the gif is being reversed. EDIT: The reason for guessing that is the total displacement of the wing seems pretty nuts to have that be the fatigue test and I would think, but dont know for sure, that they'd need at minimum a dynamically similar mass simulator for the engine which seems to be absent in the GIF. There appears to be an engine mount but no cowl/nacelle. CarForumPoster fucked around with this message at 04:45 on Dec 16, 2020 |
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Dec 16, 2020 04:38
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Dirk the Average posted:How many cycles do they run that for? For some medical implants, they're stress tested for the equivalent of 10-15 years (the testing is sped up to ~40-60Hz, which is not realistic, but is far more aggressive than normal conditions). One. That video is looped. But the loads shown there are not representative of anything you'd see in any foreseeable flight envelope. Wing testing is done to destruction, demonstrating that the wing can withstand at least 150% of its maximum design load (i.e. 150% of the most it's expected to see in use, which in turn is about 3 times what it will experience on a normal flight). In normal flight the wingtips are only going to bend like 10-20% of the distance that you see there, and through math and science and the results of the static test the engineers can prove that the wing will withstand X cycles of flexing at that normal level. Here's what happens at the end https://www.youtube.com/watch?v=Ai2HmvAXcU0&t=117s Sagebrush fucked around with this message at 04:43 on Dec 16, 2020 |
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Dec 16, 2020 04:41
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I may be mistaken, but I think that bit about in air break up to turbulence may be only for airliners. I wanna say there's a GA break up to turbulence every couple of years
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Dec 16, 2020 04:44
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CarForumPoster posted:I dont know this for sure, never been part of one, but that gif looks to me like rigging for a static test. That wing may just be getting tested to failure and the gif is being reversed. Yeah, it's was a test to failure. They calculated the wing could take 150% of the designed load, and it got to 154% before failing. https://www.youtube.com/watch?v=Ai2HmvAXcU0
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Dec 16, 2020 04:45
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Cthulu Carl posted:Yeah, it's was a test to failure. They calculated the wing could take 150% of the designed load, and it got to 154% before failing. Thats some good simulation. Also that's a different plane than the GIF, yes I am fun at parties, yes I do like my red text.
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Dec 16, 2020 04:47
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Also want to point out that part lives and CF limits are not calculated on the basis of a single static test. There are a lot of instrumented test flights to capture the data for those calculations.
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Dec 16, 2020 04:49
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I believe the one in the gif is an Airbus of some sort. And for reasons I can't recall, the FAA doesn't always require testing to destruction any more -- pulling the wings up to some extreme level and letting them back down is enough. Maybe just the impracticality of breaking these strong new carbon-fiber designs.
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Dec 16, 2020 04:53
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Sagebrush posted:I believe the one in the gif is an Airbus of some sort. And for reasons I can't recall, the FAA doesn't always require testing to destruction any more -- pulling the wings up to some extreme level and letting them back down is enough. Maybe just the impracticality of breaking these strong new carbon-fiber designs. An Airbus should be certificated by EASA
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Dec 16, 2020 04:56
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it's a loving rascal scooter, this is amazing.
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Dec 16, 2020 04:57
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Drone_Fragger posted:For those worried about turbulence, only *one* plane as ever been known to been lost due to turbulence damaging the plane in any way, and that was because of the plane deliberately flying into the restricted airspace around Mt Fuji, where von karmen vortex streets routinely form which are extremely dangerous to aircraft if you fly into them. Planes are built to a ridiculous factor of safety. You're more like to die driving to the airport than you are on the plane itself. it took me a second to realize you mean clear-air turbulence, but yeah wow, I figured there would be a bunch more from the early days of aviation but nope just BOAC Flight 911. that's pretty incredible all on its own
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Dec 16, 2020 05:27
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https://www.youtube.com/watch?v=mfz-xJsEaCQ Guy wasn't looking and got the front of his arm and hand crushed. No blood/gore seen in the video. Isn't that orange ring around the press supposed to be the safety door, but the glass is missing? Necrosaro fucked around with this message at 07:07 on Dec 16, 2020 |
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Dec 16, 2020 06:35
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Azathoth posted:BOAC Flight 911 wikipedia posted:This accident was one of five fatal aircraft disasters—four commercial and one military—in Japan in 1966 and occurred less than 24 hours after Canadian Pacific Airlines Flight 402 crashed and burned on landing at Haneda. Flight 911 had taxied past the still smouldering wreckage of Flight 402 immediately before taking off for the last time. 
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Dec 16, 2020 06:41
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Necrosaro posted:Guy wasn't looking and got his front arm and hand crushed. well he really shouldn't have had his front arm out
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Dec 16, 2020 06:42
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you gotta lead with your back arm and swing your front leg over
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Dec 16, 2020 06:55
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Humphreys posted:Today I learnt theres a big community on home made submarines There's a show coming up on one of the reality channels that I worked on called "Homemade Astronauts." One of the three men it followed was "Mad" Mike Hughes, the daredevil who was sponsored by that flat earth website who tatered himself from 2,000 feet using a cobbled-together copy of Evel Knievel's Snake Canyon steam rocket. The rocket that was going to take him to space was a surplus external fuel tank from a 1960s era jet fighter tied to a shitload of weather balloons and ignited near the Armstrong line. The stuff I witnessed was terrifying.
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Dec 16, 2020 08:18
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More terrifying than seeing him launch himself and have the parachute immediately fly out the back?
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Dec 16, 2020 08:22
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Cojawfee posted:More terrifying than seeing him launch himself and have the parachute immediately fly out the back? That was just the stabilizing chute. He had the main chutes still attached, but they figure he got knocked out when the rocket's cone sheared and the thrust started coming out at an angle or the crazy G forces took him out. Since everything on the rocket was manual, there was no way to trigger the chutes from the ground, so kablooey. That whole thing was terrifying. It was a steam rocket, so what they'd do is they'd set it up in the morning, fill it with water, then use a shitload of generators to heat it up for a few hours until they got to like 300 psi. Then Mike would climb in, they'd lock it down, and he'd pull the launch handle whenever he felt like it. Sometimes the pressure wouldn't build up fast enough, so the rocket would just become superheated and they'd have to scrub the launch to prevent Mike cooking in the cockpit. Then, since there was no way to safely de-pressurize the rocket, they'd have to run away and let it cool down overnight.
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Dec 16, 2020 08:31
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kazmeyer posted:That was just the stabilizing chute. He had the main chutes still attached, but they figure he got knocked out when the rocket's cone sheared and the thrust started coming out at an angle or the crazy G forces took him out. Since everything on the rocket was manual, there was no way to trigger the chutes from the ground, so kablooey. That dumb gently caress could have seen more curvature on a passenger flight than that stupid bloody 'rocket'
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Dec 16, 2020 10:59
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Mustached Demon posted:Unsealing the ancient fire demon fits well with the end of 2020. they delved too greedily and too deep
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Dec 16, 2020 11:00
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Seems Willie the Wimp is doing better than I'd been led to believe.
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Dec 16, 2020 11:07
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Humphreys posted:That dumb gently caress could have seen more curvature on a passenger flight than that stupid bloody 'rocket' Pretty sure he just wanted to make steam rockets and pandering to flat earthers was the easiest way to get money
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Dec 16, 2020 11:22
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Drone_Fragger posted:For those worried about turbulence, only *one* plane as ever been known to been lost due to turbulence damaging the plane in any way, and that was because of the plane deliberately flying into the restricted airspace around Mt Fuji, where von karmen vortex streets routinely form which are extremely dangerous to aircraft if you fly into them. Planes are built to a ridiculous factor of safety. You're more like to die driving to the airport than you are on the plane itself. if it haven't crashed yet, that means we haven't COST DOWN enough and there gotta be some other ways to make things cheaper to improve our profits boeing 737-8, which is just the renamed version of boeing 737 max, only had some bugs in the software and we can totally sort it out now after having more data to correct the mistakes!
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Dec 16, 2020 11:34
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kazmeyer posted:That was just the stabilizing chute. He had the main chutes still attached, but they figure he got knocked out when the rocket's cone sheared and the thrust started coming out at an angle or the crazy G forces took him out. Since everything on the rocket was manual, there was no way to trigger the chutes from the ground, so kablooey. I recall reading that one reason Winkle Brown was so successful a test pilot was that he was very small, so he stayed conscious when taller pilots were knocked out. E: I’m probably thinking of the de Havilland DH 108 crash that killed Geoffrey de Havilland jr. Apparently he might have hit his head on the canopy and been killed or disabled before the plane broke up. Ps for a second time - the girl who survived falling into the (Amazon?) rainforest after her plane broke up - at least one account partly credited her survival with her head being so much lower than the seat top that she was shielded from debris and the sides supported her neck in the spin.
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Dec 16, 2020 11:57
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Dec 16, 2020 12:11
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priznat posted:Good russian airline landing imo Russian airlines are cool because people will applaud when the planes lands and also get up and start grabbing their things from the bins before the front landing gear touches the ground.
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Dec 16, 2020 13:26
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