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monkeytennis posted:Bloody Hell. "Just gonna walk that off" "Me too"
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May 17, 2016 11:43
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ReelBigLizard posted:As we're posting some oldies, this came up in the AI Mechanical Failures thread. first of all this monster should have been secured better, second this had to be the most terrifying 2 min of this guys life.. I was waiting for a finger to get lost or something.
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May 17, 2016 14:10
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i was really hoping for a runaway and total carnage while the two dudes bullride a screaming flaming slab of steel
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May 17, 2016 14:30
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Yet another reason not to eat chicken I guess...
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May 17, 2016 15:08
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VectorSigma posted:i was really hoping for a runaway and total carnage while the two dudes bullride a screaming flaming slab of steel I was waiting for the tank of acetylene getting pushed around by the flywheel to rupture.
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May 17, 2016 15:21
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Deteriorata posted:I was waiting for the tank of acetylene getting pushed around by the flywheel to rupture. yeah I was really excited when I heard that thing starting to get ground on by the big rear end flywheel. really if you search "runaway diesel" on youtube you can lose hours of your workday, so go forth and be unproductive.
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May 17, 2016 16:00
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tater_salad posted:
Well... There goes the rest of my day. Productivity ruined.
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May 17, 2016 16:25
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You'd think a basic safety procedure would be to have some sort of load attached to it, so that if it starts to run away you can channel that torque into something that isn't "accelerate beyond rated speed".
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May 17, 2016 16:28
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razak posted:Well... There goes the rest of my day. Productivity ruined. I'm pretty sure someone somewhere tries to use a phone book and it doesn't' work.. Jabor posted:You'd think a basic safety procedure would be to have some sort of load attached to it, so that if it starts to run away you can channel that torque into something that isn't "accelerate beyond rated speed". Edit: poo poo I was trying not to watch these videos on the youtube now I"m losing my workday.
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May 17, 2016 16:46
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Jabor posted:You'd think a basic safety procedure would be to have some sort of load attached to it, so that if it starts to run away you can channel that torque into something that isn't "accelerate beyond rated speed". Accelerating beyond rated speed is what a runaway entails, it's sucking in its own engine lube oil for fuel. Doesn't matter much if it's loaded or not, it's going to overspeed until it fails, seizes, or you cut off its air supply or compression. If it's loaded it'll just take longer to get there, except now it's also accelerating the load which is probably even more dangerous. Like if your freight train's prime mover starts running away you sure as hell want to decouple it from the load so it's not driving a train down a track at increasing speed. https://www.youtube.com/watch?v=r6komyj6AWA
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May 17, 2016 16:58
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Add me to the list of people wasting their mornings on runaway diesel videos.
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May 17, 2016 16:59
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Jabor posted:You'd think a basic safety procedure would be to have some sort of load attached to it, so that if it starts to run away you can channel that torque into something that isn't "accelerate beyond rated speed".
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May 17, 2016 16:59
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Best practice when working on old diesels is to have something that can quickly and easily block the air intake(s) completely. A piece of wood will do, even a damp rag to stuff in the throttle body, but have something ready. Another option is to block the exhaust or even, so I have heard, crimp the exhaust by bending or crushing it. If you guys killing time with runaway videos haven't seen one yet, search for "train diesel runaway" for something next-level terrifying.
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May 17, 2016 17:15
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zedprime posted:I'm not sure a runaway diesel is a solvable problem because you are either going to put too high of a hurdle to get it going in the first place with too much load, or else you just have a smaller load that is now accelerating beyond rated speed. And you can't really shift a transmission to have the choice of both because its running away. I mean, you can have a variable load easily enough. Just hook it up to a generator, which will spin freely until you connect the outputs and make it start actually pumping electrons. As for something to do with all that load, I guess you could try boiling the ocean or something? It seems like the biggest issue that would cause a hot-bulb engine to run away is that the faster it's going, the more lubricant it's actually burning. So if you keep the speed low it's much more controllable.
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May 17, 2016 17:24
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ReelBigLizard posted:Best practice when working on old diesels is to have something that can quickly and easily block the air intake(s) completely. A piece of wood will do, even a damp rag to stuff in the throttle body, but have something ready. Another option is to block the exhaust or even, so I have heard, crimp the exhaust by bending or crushing it. CO2 fire extinguisher into the intake.
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May 17, 2016 17:30
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ReelBigLizard posted:As we're posting some oldies, this came up in the AI Mechanical Failures thread. Does anyone have the version of this set to music? Or was that just a youtubedoubler?
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May 17, 2016 17:36
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You can get dynos that are basically impellers driving water from a hose. All you do is turn a knob to restrict the outflow of water and the back pressure loads up the engine. It would be easy to stall a runaway using that. But they're expensive, and like anything, bigger ones are more expensive, and it's not really feasible for most shops, especially if they don't do a lot of engine work. Standard procedure is to just have a piece of plywood nearby to slam over the intake. Fancy versions have a handle screwed onto them. Like most of the content in this thread, it's a basic safety thing that costs nothing yet is still routinely ignored.
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May 17, 2016 17:40
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Phanatic posted:Разнос дизеля тепловоза. Spacing diesel locomotive. 
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May 17, 2016 17:47
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Mithaldu posted:Google Translate says: It means "spread" or "spread out", but in this case it's similar to "poo poo hitting the fan"
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May 17, 2016 18:11
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I think what really makes a runaway scary is that the oil pump is turned by the motor, so as the engine consumes the oil it causes the rpm to increase and thus spins the oil pump faster increasing the oil pressure, which thus increases the rpm further until either something breaks or the valvetrain is no longer able to close the valves fast enough for more rpm.
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May 18, 2016 00:56
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Booourns posted:I think what really makes a runaway scary is that the oil pump is turned by the motor, so as the engine consumes the oil it causes the rpm to increase and thus spins the oil pump faster increasing the oil pressure, which thus increases the rpm further until either something breaks or the valvetrain is no longer able to close the valves fast enough for more rpm. Couldn't/Shouldn't there be some safety mechanism for the oil pump that if it exceeds a certain frequency it shuts off or is that just causing the death of the engine more quickly?
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May 18, 2016 01:58
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Maxwells Demon posted:Couldn't/Shouldn't there be some safety mechanism for the oil pump that if it exceeds a certain frequency it shuts off or is that just causing the death of the engine more quickly? I guarantee that shut-off mechanism will malfunction and destroy engines more frequently than runaways.
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May 18, 2016 01:59
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DoktorVerderben posted:Saw this on the job today, the lorem ipsum part made me laugh. We need a sign like this to hang up at work. Like this: WARNING JUMPERS INSTALLED FOR TESTING/COMISSIONING PROTECTIVE CIRCUITS ARE BYPASSED JUMPERS MUST BE REMOVED BEFORE NORMAL OPERATIONS Sometimes we need to bypass circuits during testing and comissioning. Like if we're testing a piece of switchgear and there's a permissive circuit (like the status of a valve somewhere) we can fake out the status of that valve to let the switchgear operate. The problem is that's very dangerous if you leave the jumper in place. We need a big red tag like the "REMOVE BEFORE FLIGHT" ones airplanes have for stuff like pitot tube covers and whatnot. Three-Phase fucked around with this message at 02:23 on May 18, 2016 |
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May 18, 2016 02:19
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ReelBigLizard posted:Best practice when working on old diesels is to have something that can quickly and easily block the air intake(s) completely. A piece of wood will do, even a damp rag to stuff in the throttle body, but have something ready. Another option is to block the exhaust or even, so I have heard, crimp the exhaust by bending or crushing it. Use a plank over the intake. A diesel will pull anything soft straight through the exhaust. It will eat a phone book, poo poo it out the back, and keep going. Someone else mentioned a CO2 extinguisher. That will work if there's enough charge to give the machine enough time to stop turning. Hydro-locking the engine will work but it will tear itself apart and ruin it. Best is to make sure that the turbo or head doesn't have an oil leak before turning it over. Another good option is to run away and just let the engine destroy itself. It's probably hosed at that point anyway. An engine with a redline of 1800 rpm is probably not OK at 8000 rpm. Thank god I've never had it happen to me. I'd be pissing myself if it happened out of nowhere. Remember, equipment can be replaced, you can't.
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May 18, 2016 02:50
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Taking this photo got me to (minor) troubles with the Chengguan (or something), but in the end I managed to act innocent enough to let me keep it: Right next to the Tiananmen square. First I took it for the idea of electric welding without a proper eye/face protection (no masks), but then I noticed the beam on the left.. Besides I have no clue what they do with the barbed wire there. Otherwise suprisingly good protective gear though.
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May 18, 2016 04:51
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Letmebefrank posted:I have no clue what they do with the barbed wire there.
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May 18, 2016 05:03
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Three-Phase posted:We need a big red tag like the "REMOVE BEFORE FLIGHT" ones airplanes have for stuff like pitot tube covers and whatnot. That reminds me of the Aeroperu flight that crashed because they used regular adhesive tape to cover the static ports instead of those bright red tags. https://www.youtube.com/watch?v=gWpB6ZdSFOU https://en.wikipedia.org/wiki/Aeroper%C3%BA_Flight_603
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May 18, 2016 06:03
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They're doing some demo in a big square in my city, this was how they dealt with the safety issue of having a couple guys in a genie lift smashing the gently caress out of a large walkway structure above. They've got the ground level hoarded up, but not the main floor walkway. So just warn people about FALLING CONCRETE, now you're good.  Also I've only ever seen these "small" genie lifts. They have a bigger version that looks identical just scaled up that's doing work on an 11th floor window. I had no idea they could reach so high.
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May 18, 2016 23:55
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Baronjutter posted:Also I've only ever seen these "small" genie lifts. They have a bigger version that looks identical just scaled up that's doing work on an 11th floor window. I had no idea they could reach so high. We use a Genie lift sometimes where I work, it's basically a hand-cranked forklift. The company makes a lot of different lifting devices. 
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May 19, 2016 04:25
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Letmebefrank posted:Taking this photo got me to (minor) troubles with the Chengguan (or something), but in the end I managed to act innocent enough to let me keep it: That is very likely to stop protestors climbing up the structure.
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May 19, 2016 05:36
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Totally TWISTED posted:That is very likely to stop protestors climbing up the structure. 1. Wear gloves. 2. Handy ladder!
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May 19, 2016 05:57
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Baronjutter posted:They're doing some demo in a big square in my city, this was how they dealt with the safety issue of having a couple guys in a genie lift smashing the gently caress out of a large walkway structure above. Ahahaha! I work extensively on these and larger boom lifts. Never mind the caution sign, every boom lift ever has a sticker on the basket saying not to exceed a side force of like 100N (~23lbs). Using them for aerial demolition is insanely dangerous. Also the largest boom lifts go 185' (17 stories) high.
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May 19, 2016 07:09
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Baronjutter posted:They're doing some demo in a big square in my city, this was how they dealt with the safety issue of having a couple guys in a genie lift smashing the gently caress out of a large walkway structure above. Is that in Victoria? If it's the square I'm thinking of, awesome - Wannawafel is amazing there. And that's some hilarious OSHA I totally didn't notice there a week ago.
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May 19, 2016 07:37
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Starring Leonard Nimoy: https://www.youtube.com/watch?v=q1kFNY5zI20
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May 19, 2016 15:51
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baquerd posted:Starring Leonard Nimoy: In Search Of...Workplace Safety. Though I'm not really sure Union Carbide is the best company to listen to in order to prevent accidents from happening.
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May 19, 2016 16:27
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Letmebefrank posted:Taking this photo got me to (minor) troubles with the Chengguan (or something), but in the end I managed to act innocent enough to let me keep it: The column on the left is obviously cantilevered and meant to be floating in space like that. Note the diagonal member that transfers the load to the bigger column on the right.
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May 19, 2016 16:32
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Neutrino posted:The column on the left is obviously cantilevered and meant to be floating in space like that. Note the diagonal member that transfers the load to the bigger column on the right. It's fine the brown pipe is holding it up.
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May 19, 2016 16:37
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Totally TWISTED posted:That is very likely to stop protestors climbing up the structure. Don't know why they'd need it. Most protestors that show up at Tiananmen Square are quickly arrested by plain clothes secret police who bundle them up in unmarked vans to be driven off to a secret detention area. Move along comrade nothing to see here.
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May 19, 2016 16:54
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I'd also like to point out that the workers have their safety lines clipped onto the barbed wire, which I don't think qualify as a safe tie-off anchor.  But this is China so there's a million more migrant workers where they came from.
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May 19, 2016 16:56
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holy poo poo looking at the picture closer it doesn't even look like the harnesses they're wearing would do much to arrest a fall.
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May 19, 2016 17:00
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