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Jonny Nox posted:Courtesy Top Gear "fail file" Hahaha, it set off the airbags? 
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Apr 1, 2011 00:54
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SwashedBuckles posted:Any progress on the Superleggeras, einTier? Got my new pads today, will put those in tomorrow so I can drive the drat thing again. I've made some headway on the wheels, but the cold front that blew in made it difficult (uncomfortable) to work on them, so I didn't. I think I'll be able to save them, it's just going to take a lot of work.
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Apr 1, 2011 04:58
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Does Hawk at least include a warning on the box? If not that's kinda lovely. It's not like destroying the finish on your wheels would be expected even if they are raceish pads.
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Apr 1, 2011 05:09
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Bugdrvr posted:Does Hawk at least include a warning on the box? If not that's kinda lovely. It's not like destroying the finish on your wheels would be expected even if they are raceish pads. Raceish? Aren't the Hawk Blue considered "Track Only" pads? you think that'd be warning enough. [edit] There is a warning on TireRack that says: TireRack.com posted:SPECIAL NOTE: Due to the aggressive nature of the Hawk Performance Motorsports Compound pads, they are not recommended for street use Nothing about ruining your wheels if the dust touches water, but again the "Track Use Only" and Special Note should be enough of a warning for you. Blocko fucked around with this message at 18:16 on Apr 1, 2011 |
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Apr 1, 2011 18:12
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We still doing crash videos here? Here's a crash test of a 59 Bel Air v 09 Malibu https://www.youtube.com/watch?v=1_ptUrQOMPs
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Apr 1, 2011 18:26
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my cb750 K2 is a horrible mechanical failure. I wonder how long the p.o. rode it like this:       what amazed me was that everything else seemed kosher. The gaskets were in great shape, the valve tappet clearance was spot on, it's almost like ht just rebuilt the motor and then forgot to put oil in it. Or it was like this when he tore it apart and he just put it back that way. This cylinder rocks! 
GnarlyCharlie4u fucked around with this message at 18:38 on Apr 1, 2011 |
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Apr 1, 2011 18:35
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Blocko posted:Raceish? Aren't the Hawk Blue considered "Track Only" pads? you think that'd be warning enough. I'd consider that to mean that they're very abrasive to rotors and that you can't get them up to temp on the street, not that the compound will destroy your wheels.  I have unfortunately heard about the Hawk Blues' danger to wheels in the wet. Ferodo DS3000 have that reputation as well. Carbotech's track pads are decently rotor-friendly and the dust comes off pretty easily, for what it's worth.
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Apr 1, 2011 18:54
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GnarlyCharlie4u posted:my cb750 K2 is a horrible mechanical failure.
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Apr 1, 2011 20:51
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GnarlyCharlie4u posted:my cb750 K2 is a horrible mechanical failure.  that poo poo! 
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Apr 1, 2011 21:00
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I had my left thumb surgically reconstructed this morning. Pretty epic mechanical failure there.
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Apr 1, 2011 21:11
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Paul Boz_ posted:I had my left thumb surgically reconstructed this morning. Pretty epic mechanical failure there. You can't just tease us with that. Story please.
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Apr 1, 2011 21:19
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Paul Boz_ posted:I had my left thumb surgically reconstructed this morning. Pretty epic mechanical failure there. What happened man? Working on the car?
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Apr 1, 2011 21:21
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Alright finally got through reading this beautiful engineering disaster porn thread, but one pic posted earlier has been bothering the poo poo out of me. I can understand one or two cylinders grenading that badly since it might be able to keep running for enough cycles for the dead ones to get chewed up that badly, but this one is boggling my mind. Obviously thats way too much damage to be caused by just the momentum of a few extra cycles (I think). Is this half of a v8? Only other thing I can think of is that it was either moving pretty quick and thats from coasting while in gear, or it was rolling down a hill while in gear or something after it dropped the valves. Can someone more knowledgeable explain this to me? Also bonus (unposted I think) content: 
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Apr 1, 2011 21:38
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LobsterboyX posted:Railroaders are sissys now-a-days. Holy Fuckin Christ the "1911" button on youtube makes this video CLASSIC (and classy!)
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Apr 1, 2011 21:49
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GnarlyCharlie4u posted:This cylinder rocks! Did those cylinder rocks come standard?
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Apr 1, 2011 21:56
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McDeth posted:Did those cylinder rocks come standard? Fram air filter.
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Apr 1, 2011 22:09
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A bunch of high-res UAV photos of Fukushima were recently released, showing the horrible mechanical failure(s) from the hydrogen explosions last month: http://cryptome.org/eyeball/daiichi-npp/daiichi-photos.htm Unit 3: 
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Apr 2, 2011 15:15
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DogDodger posted:I'd consider that to mean that they're very abrasive to rotors and that you can't get them up to temp on the street, not that the compound will destroy your wheels. Really aggressive race pads also shower your wheels with sparks and ruin your finish. I don't know how Blues compare, but DTC-60s and HT-10s will do this. I have heard a lot of recommendations against Blues specifically, but not so much against other Hawk pads.
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Apr 2, 2011 15:18
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nuke plant.. that is maybe the most epic horrible mechanical failure. D:
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Apr 2, 2011 15:57
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About nine months ago my brother was helping me bleed my clutch and he mashed the pedal hard, shooting me in the face with hot brake fluid. I scrambled to get out from under the car but slipped in wet leaves and face planted on concrete. I tried to brace my fall and tore all of the ligaments and tendons that provide lateral support for my left thumb. I was between jobs with no insurance so I put it off. To repair it the doctor drilled a hole in the rear thumb bone then routed a tendon from my wrist through it. Lastly he drilled a pin through it and set it in a hard cast to immobilize it until next Friday. Sorry for no details yesterday, my pain is at a persistent 5-6/10 even with hydrocodone.
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Apr 2, 2011 16:17
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now THAT is a mechanical failure. ^^^ Regarding those UAV pics of Fukushima, that one little truck-based crane they have spraying seawater on one of the stricken reactors seems pretty pitiful. Like "hey, we'll just turn this garden hose on and spray it on the massive pile of molten metal here. Everything's gonna be OK guys!"
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Apr 2, 2011 16:22
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cloudstrife2993 posted:Like "hey, we'll just turn this garden hose on and spray it on the massive pile of molten metal here. Everything's gonna be OK guys!" As I understand it, they aren't trying to cool it with that stream, they're trying to wash away the loose neutrons being shed by the fuel rods to try and damp the reaction. This is what the water circulation system used to do before it got wrecked. Here's a good article from a couple days after the quake: http://arstechnica.com/science/news/2011/03/understanding-japans-nuclear-crisis.ars
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Apr 2, 2011 16:27
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Paul Boz_ posted:About nine months ago my brother was helping me bleed my clutch and he mashed the pedal hard, shooting me in the face with hot brake fluid. I scrambled to get out from under the car but slipped in wet leaves and face planted on concrete. I tried to brace my fall and tore all of the ligaments and tendons that provide lateral support for my left thumb. I was between jobs with no insurance so I put it off. To repair it the doctor drilled a hole in the rear thumb bone then routed a tendon from my wrist through it. Lastly he drilled a pin through it and set it in a hard cast to immobilize it until next Friday. Sorry for no details yesterday, my pain is at a persistent 5-6/10 even with hydrocodone. Sorry about your pain and all and I feel bad laughing at the first few sentences.
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Apr 2, 2011 16:36
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Kylie Sven Opossum posted:Sorry about your pain and all and I feel bad laughing at the first few sentences. Don't feel bad, I'm still laughing about it.
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Apr 2, 2011 17:03
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First off, paul, OW. Good luck on your recovery.Splizwarf posted:As I understand it, they aren't trying to cool it with that stream, they're trying to wash away the loose neutrons being shed by the fuel rods to try and damp the reaction. This is what the water circulation system used to do before it got wrecked. You can't "wash away" loose neutrons. That article is hugely simplified in many ways that makes the whole situation seem muddy. And I think it's got the reactor design wrong, but I'll need to double check that. I think the reactors in question are pressurised light water reactors, and the water in the reactor itself never boils. It's used to boil water in a secondary circuit. The ziconium coating on the fuel rods is used to prevent corrosion. When heated sufficiently, it's failure mode is to start to oxidize, and will pull the oxygen straight out of water. That releases hydrogen. As the core temp goes up, it can even reach temperatures that will disassociate oxygen and hydrogen, without the zirconium sucking up the oxygen. (this was actually a proposed method for generating hydrogen...) On the bright side, we haven't had a steam explosion. The water in the reactor is also a moderator. Without the water in the reactor the core will be less reactive. I didn't look at the specifics, but I'm fairly sure the core can't operate with a loss of coolant. Now that doesn't mean it instantly gets cool, as in the operation of the reactor lots of short lived radioactive isotopes are generated. As those decay, more heat is released. So while the reactor isn't reacting, it can still get hotter! At least for the first few days. This also ties into the "ponds" problem. The cooling ponds apparently also boiled off all their water. The cooling ponds are used to store the spent fuel rods. No water, means those rods get hotter again, and start to corrode. Viola, more free hydrogen. You should watch this video: http://www.youtube.com/watch?v=-bcrLiATLq0
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Apr 2, 2011 17:26
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DogDodger posted:I'd consider that to mean that they're very abrasive to rotors and that you can't get them up to temp on the street, not that the compound will destroy your wheels. What about ferodo DS2500? The dust seems to wash off pretty easily from my 1 piece advans. But i've got a set of ssr professors as my summer wheels with a polished lip, I realy dont want them looking like eintiers wheels although i'll probably polish them when I finally get someone to make me some drat hubrings.
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Apr 2, 2011 17:41
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Paul Boz_ posted:About nine months ago my brother was helping me bleed my clutch and he mashed the pedal hard, shooting me in the face with hot brake fluid. I scrambled to get out from under the car but slipped in wet leaves and face planted on concrete. I tried to brace my fall and tore all of the ligaments and tendons that provide lateral support for my left thumb. I was between jobs with no insurance so I put it off. To repair it the doctor drilled a hole in the rear thumb bone then routed a tendon from my wrist through it. Lastly he drilled a pin through it and set it in a hard cast to immobilize it until next Friday. Sorry for no details yesterday, my pain is at a persistent 5-6/10 even with hydrocodone. So your thumb has been in a cast for the last 9 months waiting for surgery? How long after surgery until it heals enough for you to use it again? Nerobro posted:First off, paul, OW. Good luck on your recovery. The reactors are actually BWR Mark I types. Nerobro posted:The ziconium coating on the fuel rods is used to prevent corrosion. When heated sufficiently, it's failure mode is to start to oxidize, and will pull the oxygen straight out of water. That releases hydrogen. As the core temp goes up, it can even reach temperatures that will disassociate oxygen and hydrogen, without the zirconium sucking up the oxygen. (this was actually a proposed method for generating hydrogen...) The fuel cladding is pretty much entirely zirconium). It's zirconium because zirconium has a very low neutron cross section. Nerobro posted:On the bright side, we haven't had a steam explosion. While loss of a moderator will stop the fission chain reaction, without cooling there is nothing stopping the core from melting and obtaining a new favorable geometry for fission (though I'm not sure how likely such an outcome would be realistically). Nerobro posted:So while the reactor isn't reacting, it can still get hotter! At least for the first few days. This also ties into the "ponds" problem.
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Apr 2, 2011 17:49
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No, my thumb has been functioning fine, just hurt under load (lifting weights, etc.) I have had insurance for the last eight months but no time to get it done. I just got around to it I guess.
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Apr 2, 2011 17:59
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I really didn't intend to derail this thread into a Fukushima discussion, just thought ya'll would be interested in seeing mangled buildings. The D&D Thread has all sorts of information and debate on the ongoing nuclear crisis and would be a better place to discuss the nuclear crisis, radiation, and other things not related to horrible mechanical failures. Bear in mind these buildings withstood a Magnitude 9.0 earthquake, followed by a 46' tsunami. And stayed pretty much intact. Fukushima is a BWR reactor. Similar to a PWR, but the water is allowed to boil and turns to steam in the top of the reactor vessel. The explosions that caused most of the visible damage were hydrogen explosions. When cooling was lost when the tsumani destroyed the generators, steam pressure built up to 2.1x the design pressure of the reactor, and had to be vented to keep it from exploding. Temperatures in the reactor core were hot enough at that point to disassociate the hot steam into elemental hydrogen and oxygen. They were also hot enough to cause oxidation in the zirconium cladding of the reactor core, which releases hydrogen gas as a byproduct. In a modern design, the emergency systems release this into the atmosphere where it's dissipated to less than 4% and can't explode. However, in Fukushima, these gasses were vented this into the building (presumably to contain it better?), where it built up and built up, and finally went BOOM in a good ole fashioned Hindenburg/Challenger chemical explosion. The parts of the reactors building that blew out are the light construction part of the building that's only meant to keep the weather out (you know, relatively small things, like cat-5 Typhoons), and isn't massively thick concrete like the nuclear containment portion. The more solidly constructed nuclear containment areas (the lower halves of the buildings) are intact. The image I posted was of reactor #3, which suffered the most damage from the hydrogen explosion. You can see a number of massive concrete pillars peeled back like bananas, and holes in the roofs of nearby buildings where clearly very large and heavy things were thrown and punched through. There was a lot of force there! grover fucked around with this message at 18:14 on Apr 2, 2011 |
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Apr 2, 2011 18:05
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grover posted:I really didn't intend to derail this thread into a Fukushima discussion, just thought ya'll would be interested in seeing mangled buildings. The D&D Thread has all sorts of information and debate on the ongoing nuclear crisis and would be a better place to discuss things not related to horrible mechanical failures. Heating water won't cause this to happen, it only causes a phase change. The way you get hydrogen from cooling water is typically through radiolysis. grover posted:They were also hot enough to cause oxidation in the zirconium cladding of the reactor core, which releases hydrogen gas as a byproduct. In a modern design, the emergency systems release this into the atmosphere where it's dissipated and harmless. However, in Fukushima, these gasses were vented this into the building (presumably to contain it better?) There is no way venting of hydrogen into an oxygen rich confined space is standard procedure. There's been lots of discussion about how the hydrogen ended up in the buildings but it's probably because of a failure in either the hydrogen venting system or a leak via the dry well cap. grover posted:, where it built up and built up, and finally went BOOM in a good ole fashioned Hindenburg/Challenger chemical explosion. The parts of the reactors building that blew out are the light construction part of the building that's only meant to keep the weather out (you know, relatively small things, like cat-5 Typhoons), and isn't massively thick concrete like the nuclear containment portion. The more solidly constructed nuclear containment areas (the lower halves of the buildings) are intact. They recently discovered a crack in part of unit 2 that is allowing contaminated water to leak to the sea. Whether or not that was caused by the explosion at unit 2 or the earthquake is unknown at this time. grover posted:The image I posted was of reactor #3, which suffered the most damage from the hydrogen explosion. You can see a number of massive concrete pillars peeled back like bananas, and holes in the roofs of nearby buildings where clearly very large and heavy things were thrown and punched through. There was a lot of force there!
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Apr 2, 2011 18:18
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Longinus00 posted:Heating water won't cause this to happen, it only causes a phase change. The way you get hydrogen from cooling water is typically through radiolysis. And really, get anything hot enough, and all chemical bonds will break, and hotter still, it will become a plasma.
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Apr 2, 2011 18:39
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grover posted:Not if you get it hot enough! Zirconium melts at 2000C, and there is chemical evidence in the released steam that this occurred. At 2200C, water begins to thermally dissociate into hydrogen and oxygen. The amount of hydrogen you're going to get via thermolysis pales in comparison to zirconium oxidation. Substantial quantities of water at > 2K is also unlikely because the water would first turn to steam and be vented in order to prevent overpressuring the RPV. I question how you are supposed to tell zirconium cladding has actually melted vs cracked from the steam released. Failure of the cladding would probably be detected as a consequence of the relocation of uranium dioxide fuel (probably in a molten form). *whoops* Corrected some stuff after misreading your post. But lets end this derail yes? Longinus00 fucked around with this message at 18:59 on Apr 2, 2011 |
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Apr 2, 2011 18:54
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If I recall correctly it's either a 4 or 5 alarm fire where it's hot enough that they stop watering it because the water's being thermally split into its pair of combustible gases, which feed the fire. That's when it's time to dump non-flammable solids on it if possible. Side question: I never understood why it works to dump stuff like sand or boron from a helicopter but not to just throw it into a fire from a ground vehicle. We certainly have road-drivable stuff that can toss particulate solids pretty far, and the helicopter dumping solution is usually touted as really dangerous.
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Apr 2, 2011 18:58
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Splizwarf posted:Side question: I never understood why it works to dump stuff like sand or boron from a helicopter but not to just throw it into a fire from a ground vehicle. We certainly have road-drivable stuff that can toss particulate solids pretty far, and the helicopter dumping solution is usually touted as really dangerous.
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Apr 2, 2011 19:16
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Idiot race posted:What about ferodo DS2500? The dust seems to wash off pretty easily from my 1 piece advans. But i've got a set of ssr professors as my summer wheels with a polished lip, I realy dont want them looking like eintiers wheels although i'll probably polish them when I finally get someone to make me some drat hubrings. From what I've read, the DS3000 is more concerning. I actually used a set of DS2500s before switching to Carbotechs, and my wheels ended up fine.
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Apr 2, 2011 19:46
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Not really "Horrible" but an old school failure that makes me giggle. E: and another from my HD, BMW motorcycle wheels turn into a jigsaw puzzle when they break apparently. (Click for big) 
RoboCriminal fucked around with this message at 19:59 on Apr 2, 2011 |
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Apr 2, 2011 19:50
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Nerobro posted:
Thanks for the link. It explains a lot that I've wondered about. I've also spent about three hours watching those videos. I'm much more smarter than I was.
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Apr 3, 2011 02:44
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Splizwarf posted:If I recall correctly it's either a 4 or 5 alarm fire where it's hot enough that they stop watering it because the water's being thermally split into its pair of combustible gases, which feed the fire. That's when it's time to dump non-flammable solids on it if possible. The number of alarms only means the number and type of responding apparatus, which varies wildly between departments. A 3 or 4 alarm fire in a small department could be a 2 family house, where in a large urban department one alarm can handle most anything without the need to strike another box. Water is still the main method of structural firefighting because it is cheap/free. It doesn't help that it both cools the flammable matter as well as removing oxygen from it. In addition, cleaning up a hundred thousand gallons of sand would be a huge nightmare, water tends to do this itself.
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Apr 3, 2011 03:40
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I think you meant it doesn't hurt. Or I'm completely missing your point.
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Apr 3, 2011 06:11
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Godholio posted:I think you meant it doesn't hurt. Or I'm completely missing your point. Yeah, sorry. loving iPad.
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Apr 3, 2011 14:37
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