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Nebakenezzer posted:Cool. I heard of it as a formal method for avoiding mistakes via Japanese railways: https://www.atlasobscura.com/articles/pointing-and-calling-japan-trains A similar thing that is explicitly taught, AFAIK, is the drill that the shooters go through when launching planes. There's a very specific sequence of where they check and where they point that sounds very similar to that train operation. It's good at eliminating nearly all foul line incursions, though of course nature is always hard at work designing a better idiot to test idiot-proofing procedures.
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Oct 21, 2021 02:02
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His preacher bit is so good. https://www.youtube.com/watch?v=8M42B379apE&t=41s eta: One video later, quote:KENNETH SKUBE  We need :captainstare: Platystemon fucked around with this message at 05:49 on Oct 21, 2021 |
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Oct 21, 2021 05:42
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And on today's episode of "Oh Boy, That Looks Like Fun": https://www.youtube.com/watch?v=oUSVJ-pncNs
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Oct 22, 2021 20:55
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BIG HEADLINE posted:And on today's episode of "Oh Boy, That Looks Like Fun": I seriously can't tell if the pilot caught the third wire and the visability was so bad we can't see bow of the ship or if he missed all three and had to go around.
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Oct 22, 2021 21:13
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Ardeem posted:I seriously can't tell if the pilot caught the third wire and the visability was so bad we can't see bow of the ship or if he missed all three and had to go around. It was a one wire. You have to watch it at maximum resolution and slow it down. It's harder to see because the one wire's actually slightly *ahead* of the LSO nest. BIG HEADLINE fucked around with this message at 21:27 on Oct 22, 2021 |
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Oct 22, 2021 21:25
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It looks like he hook skipped over the 1 and maybe the 2 as well? I'm just watching on a tiny phone thumbnail so hard to tell.
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Oct 22, 2021 22:53
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What are the triggers they’re holding up? And why are there two?
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Oct 23, 2021 01:16
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Lake of Methane posted:What are the triggers they’re holding up? And why are there two? Controls for the “pickle” https://en.wikipedia.org/wiki/Optical_landing_system?wprov=sfti1
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Oct 23, 2021 01:32
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hobbesmaster posted:Controls for the “pickle” https://en.wikipedia.org/wiki/Optical_landing_system?wprov=sfti1 Why does it need to manually controlled?
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Oct 23, 2021 01:39
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Cojawfee posted:Why does it need to manually controlled? Because a human needs to make the call to push the "oh gently caress go around" and the emergency backup "oh gently caress go around" buttons.
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Oct 23, 2021 02:12
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Also I believe since the ship is pitching up and down the standard rf trick for ILS and optics tricks like for a PAPI could be misleading.
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Oct 23, 2021 02:13
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What's the call-out that someone shouts repeatedly? And also, why?
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Oct 23, 2021 03:03
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A comment on that video led me to this one: https://www.youtube.com/watch?v=yjL4muLPHRI an absolute must watch. 30 minute interview, by a former RIO, of a former LSO and CO about LSO stuff.
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Oct 23, 2021 05:35
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vessbot posted:A comment on that video led me to this one: https://www.youtube.com/watch?v=yjL4muLPHRI an absolute must watch. 30 minute interview, by a former RIO, of a former LSO and CO about LSO stuff. This is a great video, thanks EDIT for content. This is never going to end well https://www.youtube.com/watch?v=FzhREYOK0oo Humphreys fucked around with this message at 05:38 on Oct 24, 2021 |
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Oct 23, 2021 13:42
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How many An-124s are currently in service, and for whom do they fly?
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Oct 24, 2021 17:24
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Cojawfee posted:Why does it need to manually controlled? The glide slope indicator isn't, but the "go around" wave-off lights are.
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Oct 24, 2021 17:59
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I've looked up and seen AN-225 in the wild twice, pics don't do it justice
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Oct 24, 2021 18:12
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Phanatic posted:The glide slope indicator isn't, but the "go around" wave-off lights are. In the other video that was posted, the guy said he was manually controlling where the ball was to get the pilot to land where he wanted.
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Oct 24, 2021 18:23
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Cojawfee posted:In the other video that was posted, the guy said he was manually controlling where the ball was to get the pilot to land where he wanted. Most of the time it's automatic (FLOLS/IFLOLS) but if the deck is pitching so much that the stabilization goes out of limits (or for training) they can manually control it with a handle (MOVLAS). He even said that in easy conditions, for fun with the MOVLAS they'd adjust the ball a little bit to put the plane into the wrong wire... which blew me away. I even thought he might have been kidding, but a commenter (also a LSO) said the same thing.
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Oct 24, 2021 18:27
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Nebakenezzer posted:How many An-124s are currently in service, and for whom do they fly? https://russianplanes.net/planelist/Antonov/An-124 Claims 19 civilian planes currently in service and has lists of who is doing it. I was onboard one this afternoon. Second one this week. And an IL-76.
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Oct 24, 2021 19:27
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St_Ides posted:https://russianplanes.net/planelist/Antonov/An-124 Haha, I know what you job is! ICARUS HAS FOUND YOU
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Oct 24, 2021 23:32
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Antonov Design Bureau fly them and Volga Dnepr as well. I think there is a third operator but those are the two I’ve seen in my local airport here in Yorkshire.
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Oct 26, 2021 16:51
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For those who may not frequent the chat thread.. AI:SS reminder We are fast approaching the deadline for sign ups! Please sign up now! It's the most fun you can have with dicks in a box! https://forums.somethingawful.com/showthread.php?threadid=3981364
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Oct 27, 2021 00:09
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monkeytennis posted:Antonov Design Bureau fly them and Volga Dnepr as well. I think there is a third operator but those are the two I’ve seen in my local airport here in Yorkshire. Polet airlines also operated a few.
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Oct 27, 2021 01:04
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What could go wrong if you use the wrong lubricant on a small piston that is only used to actuate a microswitch? Let’s start with the airplane being a total loss…. https://admiralcloudberg.medium.com/the-dark-side-of-logic-the-near-crash-of-smartlynx-estonia-flight-9001-68b9f42b1fb2
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Oct 27, 2021 03:15
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quote:Meanwhile, the ELAC constantly compares the commanded stabilizer position with its actual position in order to detect any mechanical failure in the system. It accomplishes this by matching values from two data channels: the command channel, which transmits the commanded position, and the monitoring channel, which transmits the actual position. If a discrepancy between the two lasts more than one second, a fault is triggered. In its default state, this very simple function would be unable to tell the difference between a pilot overriding the autopilot using the trim wheel and failure of the horizontal stabilizer, because the computer will continue to send signals to the PTA despite the fact that it is no longer connected to the stabilizer. To rectify this, whenever the pilot applies torque to the trim wheel in the cockpit, an override piston inside the PTA moves downwards and contacts three microswitches, which transmit a signal telling the computers to stop comparing the command channel with the monitoring channel. Seems Goldbergian. Why not use an optoisolator or something?
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Oct 27, 2021 03:36
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Given that the A320 first flew in 1984, meaning its systems were developed several years before that, and aviation electronics are always years behind the state of the art, and airplane manufacturers are loath to change something that (mostly) works no matter how old it is, I'd bet that they just considered an optical sensor and some transistors to be an absurd extra expense, cause hey we've been using microswitches and relay logic for everything else on the plane so why change now?
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Oct 27, 2021 03:43
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St_Ides posted:https://russianplanes.net/planelist/Antonov/An-124 An-124 butt-cranes are cool as hell. Just picking up whole containers or slinging up entire pieces of rolling stock and pulling them inside. The contractor Russian pilot moving our stuff got his start in the Soviet Air Force moving troops and equipment in Afghanistan in the 80s. Time flat circle, etc.
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Oct 27, 2021 04:12
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`Nemesis posted:What could go wrong if you use the wrong lubricant on a small piston that is only used to actuate a microswitch? Let’s start with the airplane being a total loss…. This is even more crazy than having to power off a plane every 30 days to prevent an integer from rolling over and loving up the computers.
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Oct 27, 2021 04:28
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`Nemesis posted:What could go wrong if you use the wrong lubricant on a small piston that is only used to actuate a microswitch? Let’s start with the airplane being a total loss…. Kinda long but I read the whole article, and man, talk about the Swiss cheese slices lining up...
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Oct 27, 2021 05:06
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I remember listening to a huge number of kennedy steve ATC compilations, but it's nice to see another one come across the ol' recommended: https://www.youtube.com/watch?v=QLC_uI0Scb4 complete with Recreated Video Footage (tm) e: to be clear this isn't new footage, he retired, but I guess the channel creator got bored of DCS this week. MFS and of all things GTAV. Psion fucked around with this message at 06:15 on Oct 27, 2021 |
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Oct 27, 2021 06:01
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vessbot posted:Kinda long but I read the whole article, and man, talk about the Swiss cheese slices lining up... Yeah, an incredible story, but there's something about that Swiss cheese. With such a complex system, there's obviously a good chance that there are more potentially lethal bugs in there. For the holes in the cheese to line up, you need a certain input to trigger it. All theoretically possible inputs are not possible in real life, maybe one bug is triggered only at 100,000 feet say. But airplanes fly in extremely similar patterns. They do the same stuff over and over, even training like this. So huge swaths of the input space are unrealistic to even reach, a few edge areas maybe now and then, but the area of of regular operations gets densely hammered by inputs. If there is another bug in that input space, it will be found sooner or later. There wasn't that many extra holes needed in this situation and some of them slightly overlap to begin with, using the trim to override nose down and a bouncy touchdown being typical go-around practice things. I'm assuming they aren't the only ones who practice like this. What's the next thing that only needs one single new input in order to take a fresh shot at some closely lined up cheese holes? But before declaring that computers on planes was a mistake, I would say that resisting "normalization of deviance" could perhaps have caught that thing earlier. You shouldn't have to reset circuit breakers indefinitely at error messages. Not that the crew on that flight should have made that choice, but someone somewhere in the food chain. But I guess it's too expensive to mess with if it hasn't killed anyone or written off any airframes yet. Ola fucked around with this message at 14:12 on Oct 27, 2021 |
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Oct 27, 2021 09:17
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`Nemesis posted:What could go wrong if you use the wrong lubricant on a small piston that is only used to actuate a microswitch? Let’s start with the airplane being a total loss….
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Oct 27, 2021 15:04
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`Nemesis posted:What could go wrong if you use the wrong lubricant on a small piston that is only used to actuate a microswitch? Let’s start with the airplane being a total loss…. this is a great writeup, thanks for sharing
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Oct 27, 2021 15:27
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I agree with Ola that normalization of deviance was the fundamental problem here, not the software or the oil on the piston. When a machine keeps doing something weird that you don't like or don't understand, or explicitly warns you that something is going wrong, you need to stop and find out what the problem is and address it. Even if it seems like it's no big deal. At my flight school / flying club I used to feel kind of sheepish about submitting squawks (aircraft maintenance requests) for every little thing that I noticed that was wrong. Paint chipping on leading edge of stabilizer? Seat belt retractor acting up? Missing washer on window support strut? All tiny issues, none of which are really affecting flyability right now, so I felt like maybe I was just making extra work for the ground crews. I mentioned this to the chief of maintenance while hanging around one day, and she told me in no uncertain terms to absolutely keep submitting everything I found no matter how small, because replacing a 5 cent washer today might mean that the window doesn't tear off in flight a month from now. Life critical systems are not the place for complacency.
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Oct 27, 2021 16:54
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Also, consider the entire aircraft safety critical because it's hard to notice the holes in the cheese lining up until things are getting hairy. I've got coworkers who do some really lazy work sometimes and I can't conceive of a way the stuff we work on could bring a plane down, but the universe consistently demonstrates how much more creative than me it is.
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Oct 27, 2021 18:26
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Sagebrush posted:I agree with Ola that normalization of deviance was the fundamental problem here, not the software or the oil on the piston. I called EVERYONE out to a plane because I thought I'd found a crack on the leading edge of the wing, just inboard of where the anti-ice duct routes bleed air to heat the leading edge. It was faint, hard to see, but it picked up a fingernail, so it was A Real Crack, and about an inch and a half long. After a bit of investigation, it turns out that they'd put leading edge sealant on and there was a fiber trapped in it. After buffing, the fiber was clear, but after the first flight, the de-ice melted the fiber away, leaving a void in the sealant. The QA folks said the response was appropriate even though it turned out to be a nothing in the end. It was not out of line to just go over the shop lead, supervisor, and Director of Maintenance when they said "it's probably nothing" (to various degrees) as long as I still had a concern about it. That's what I really enjoyed about aviation maintenance: If you don't feel comfortable with the work, the repair, or the ultimate airworthiness of the aircraft, you do not (and nobody can) pressure you to sign for it. And there had drat well better not be any repercussions, because the FAA is ALWAYS interested in investigating those kinds of claims. Related: I have never in my life, ever, had too much information on a squawk sheet about any discrepancy, ever. Most squawks look like: "thing busted. Aft of the cockpit seat somewhere. Makes a noise." Some get really good: "ITT erratic on startup. Goes away after a few minutes." Even the particularly excellent: "Evidence of leak on outboard right main wheel. Tastes like hydraulic fluid" But never too much.
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Oct 27, 2021 19:04
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babyeatingpsychopath posted:Tastes like hydraulic fluid Is this advisable?
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Oct 27, 2021 19:23
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Probably not advisable, but I've put various mystery fluids and even solids on my tongue/in my mouth to ID. Good idea? Probably not. Probably a worse idea to swallow though. I still do it to this day as testing what kind of "rubber" something is. Show someone a black o-ring and ask what the material is. Is it Nitrile/Buna/Viton? Sometimes putting it between your teeth and feeling the texture (viton has an almost gritty "sandy" texture that doesn't translate to feel with your fingers) is far faster and easier than another method. e: Oh god, that first sentence reads worse than I thought 
slidebite fucked around with this message at 20:11 on Oct 27, 2021 |
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Oct 27, 2021 20:01
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slidebite posted:Probably not advisable, but I've put various mystery fluids and even solids on my tongue/in my mouth to ID. Good idea? Probably not. Probably a worse idea to swallow though. Metis rereg spotted.
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Oct 27, 2021 20:14
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