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If it helps, the difficulty with moving heavy loads by train, since the age of steam even, has not been getting an engine powerful enough to pull the train, it has been getting that engine not to simply spin its wheels on the track, because the engines for a long time have been able to vastly outperform the ability of the wheels to grip the track. Same is true for stopping, though stopping at least allows you the theoretical use of all the wheels on the train.
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Jan 10, 2022 13:24
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No train on earth is able to move my load, it is too powerful.
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Jan 10, 2022 13:50
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Just put a Hulk on the track, where is the problem?
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Jan 10, 2022 14:15
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Trains can stop in their own length, which is no mean feat. It’s just that they can also be a mile long.
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Jan 10, 2022 14:47
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Platystemon posted:Trains can stop in their own length, which is no mean feat. It’s just that they can also be a mile long. For the big freight trains that's true just due to the weight and all the wheels helping out. Commuter trains like the one that hit the plane also need like a mile to stop despite being only a few cars long Best I can tell the train in question is an emd f125, which takes about 1.5 miles to do 125mph->0 (tho Metrolink's fact sheet says they don't have routes over 79mph)
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Jan 10, 2022 15:02
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Yeah to a first-order approximation, steel wheels on steel track always take the same distance to stop from a given speed. The available friction scales directly proportionally with inertia. Of course if first-order approximations were valid, every car would have nearly the same stopping distance, dependant only on the compound of rubber in their tires and the coefficient this had with the ground, provided the brakes were capable of locking up and that all cars either did or did not have antilock brakes.
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Jan 10, 2022 15:39
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OwlFancier posted:If it helps, the difficulty with moving heavy loads by train, since the age of steam even, has not been getting an engine powerful enough to pull the train, it has been getting that engine not to simply spin its wheels on the track, because the engines for a long time have been able to vastly outperform the ability of the wheels to grip the track. Then THEY should make a train that is nothing but load-carrying locomotives. Problem solved!
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Jan 10, 2022 15:40
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Apparently there was at least a decent amount of time between the plane crashing, officers arriving, and the train showing up. And they did in fact request that traffic be halted, it just didn't happen for whatever reason.
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Jan 10, 2022 16:06
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AKA Pseudonym posted:Apparently there was at least a decent amount of time between the plane crashing, officers arriving, and the train showing up. And they did in fact request that traffic be halted, it just didn't happen for whatever reason. Yea they would have to figure out who to contact at whatever company that train was from, find their phone number, call up, explain to them what was going on and exactly what crossing they were at, then the company would need to get that information to the train dispatcher, who would have to figure out which train was approaching that crossing, then reach out to them via radio, etc. It would definitely not be quick.
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Jan 10, 2022 16:30
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Weird. You'd think a railroad crossing would have posted contact information.
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Jan 10, 2022 16:37
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OwlFancier posted:If it helps, the difficulty with moving heavy loads by train, since the age of steam even, has not been getting an engine powerful enough to pull the train, it has been getting that engine not to simply spin its wheels on the track, because the engines for a long time have been able to vastly outperform the ability of the wheels to grip the track. Yeah it wasn't quite as much of a problem before the age of steam.  RCarr posted:Yea they would have to figure out who to contact at whatever company that train was from, find their phone number, call up, explain to them what was going on and exactly what crossing they were at, then the company would need to get that information to the train dispatcher, who would have to figure out which train was approaching that crossing, then reach out to them via radio, etc. It would definitely not be quick. Ariong posted:Weird. You'd think a railroad crossing would have posted contact information. Here's a great video about that: https://www.youtube.com/watch?v=I0O7DP3i0ao I'm pretty sure that every railway crossing in Australia has a "Ring [freecall number] in case of emergency" sign on it somewhere with an identifying code you can quote so they can immediately figure out exactly where you are, and every railway bridge across a road has a sign saying "In case of impact against this bridge call [freecall number]" etc etc
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Jan 10, 2022 16:57
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The question of trains stopping came up before and someone posted a giant explanation of everything that happens to a train when it emergency stops, how long it takes, and how much damage it does to the train and other objects. It was an impressive post. This is not that post, it is only a tribute. Anyway trains stopping takes a while
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Jan 10, 2022 18:05
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and now I got Tenacious D playing in my head, I'm predictable.
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Jan 10, 2022 18:11
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Gort posted:The question of trains stopping came up before and someone posted a giant explanation of everything that happens to a train when it emergency stops, how long it takes, and how much damage it does to the train and other objects. It was an impressive post. That original post was really informative as far as what happens in an emergency stop. Unfortunately it was written by (IIRC) a TFR member, so of course it ends by blaming the entire hypothetical train derailment on an illegal immigrant for no reason whatsoever.
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Jan 10, 2022 18:41
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Flash Gordon Ramsay posted:That original post was really informative as far as what happens in an emergency stop. Unfortunately it was written by (IIRC) a TFR member, so of course it ends by blaming the entire hypothetical train derailment on an illegal immigrant for no reason whatsoever. That's more a him thing than a TFR thing.
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Jan 10, 2022 18:45
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Flash Gordon Ramsay posted:That original post was really informative as far as what happens in an emergency stop. Unfortunately it was written by (IIRC) a TFR member, so of course it ends by blaming the entire hypothetical train derailment on an illegal immigrant for no reason whatsoever. Here's the original 2012 post and yeah, the unnecessary racism is pretty lovely
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Jan 10, 2022 19:17
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A light Amtrak train is about 500 tons. At 50mph, it has roughly the same inertia as a SUV going 12000 mph
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Jan 11, 2022 04:59
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You mean momentum. The train will always have more inertia. [very smugly]: “I’ll take the impact with the train. It has less kinetic energy.”
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Jan 11, 2022 05:07
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The 'undocumented driver' doesn't mean an illegal immigrant, just a non-union truck driver getting paid under the table. Also the story itself is a composite of multiple accidents. Also, here's another shot of the collision: https://www.facebook.com/1212799804/videos/4508919622568887/
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Jan 11, 2022 05:36
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TITTIEKISSER69 posted:The 'undocumented driver' doesn't mean an illegal immigrant, just a non-union truck driver getting paid under the table. Also the story itself is a composite of multiple accidents. Either way it’s a lovely discrimination that adds nothing but some misplaced hatred.
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Jan 11, 2022 06:07
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When in doubt, get mad for another reason.
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Jan 11, 2022 06:21
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I thought it was there to highlight that the blame would be dumped on the least able to fight back so that those truly responsible would never face consequences for their action.
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Jan 11, 2022 06:31
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Agreed, along with the finding that the conductor had eaten a pot brownie 3 weeks prior and that an engineer of a nearby train had their phone on.
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Jan 11, 2022 07:11
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RCarr posted:Either way it’s a lovely discrimination that adds nothing but some misplaced hatred. Discriminating against scabs is actually very cool & very well-placed.
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Jan 11, 2022 07:17
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RCarr posted:Either way it’s a lovely discrimination that adds nothing but some misplaced hatred. This really sounds like you're overreacting dude.
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Jan 11, 2022 16:09
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Nick Brett is at it again. Imagine you get substituted in to play against a team of two of the highest rated players on the planet, and you manage to fight them to a tiebreak. Then you bowl about a centimeter away from the jack. Must feel good! https://i.imgur.com/4yJ1yvU.mp4 Welp  They did a runner and managed to kill the end, though. Went down to the wire. Crazy good match. Though I’m sure you all saw already.
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Jan 11, 2022 19:06
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Today I learned that bowls is actually played as a competitive sport other than by old people at the village green.
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Jan 11, 2022 19:37
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OwlFancier posted:Today I learned that bowls is actually played as a competitive sport other than by old people at the village green. Professional bowls is serious business. There is an Australian documentary called "Crackerjack" that goes in to a bit of the history and importance of the sport.
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Jan 11, 2022 19:39
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Inceltown posted:Professional bowls is serious business. There is an Australian documentary called "Crackerjack" that goes in to a bit of the history and importance of the sport. Noice
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Jan 11, 2022 19:43
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OwlFancier posted:Today I learned that bowls is actually played as a competitive sport other than by old people at the village green. You don’t remember the last time he pulled some king poo poo?? https://i.imgur.com/J3SDiuM.mp4
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Jan 11, 2022 20:58
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So is that man just a wizard or can other bowls pros do poo poo like that
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Jan 11, 2022 20:59
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pik_d posted:So is that man just a wizard or can other bowls pros do poo poo like that I imagine that the other professionals are likewise good and we just haven't seen their highlight reel
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Jan 11, 2022 21:18
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Lawn bowls highlight reels are generally pretty amazing. Even more so if you've ever actually tried playing; I did lawn bowls for Friday sport for a semester in high school, and never managed to land my bowl within 2 metres of the jack. Everyone else was only slightly less rubbish.
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Jan 11, 2022 22:32
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OwlFancier posted:Today I learned that bowls is actually played as a competitive sport other than by old people at the village green. Today I learned people say village green even when they aren’t talking about a Kinks record
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Jan 11, 2022 22:34
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I mean it literally, bowls are played on a green, it is a bowing green, and they tend to be a feature of villages. The green is a particular stretch of grass, like a golf course.
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Jan 11, 2022 22:58
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Is this the bowling green massacre I’ve head about?
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Jan 12, 2022 02:55
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Nordick posted:PYF Bad rear end Pictures: Cast All Medals into Spearheads of Revolution  also https://twitter.com/NaturelsWeird/status/1481657037402648580
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Jan 13, 2022 17:39
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That's a little bit metal.
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Jan 13, 2022 17:42
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Probably killed one and the rest followed the corpse into the nest and laid down to die
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Jan 13, 2022 17:45
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DandyLion posted:Probably killed one and the rest followed the corpse into the nest and laid down to die That's where the next lemming to arrive after the killing should have become a blocker and sent the others back the other way.
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Jan 13, 2022 17:48
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