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CommieGIR posted:I used to have an Halon Extinguisher someone gave me... That's probably the last thing you'd want to extinguish your average car fire with.
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May 2, 2012 08:44
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I'm just going to leave this here http://www.youtube.com/watch?feature=player_detailpage&v=6hxOoM0-NJI#t=142s
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May 2, 2012 08:53
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Exploding/Burning that car? Seems like more of a success than a failure. 
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May 2, 2012 08:57
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Longinus00 posted:That's probably the last thing you'd want to extinguish your average car fire with. Mostly because it's worth too much money. But it would work just the same as CO2, so it would still work just fine (providing it's not too windy and the fire isn't too large). I use a CO2 extinguisher in the shop, backed up by a dry chem. If I light something off while torching or welding, I always go for the clean agent extinguisher first as to not make a hell of a mess. If that works, great. If not, I'm spending the rest of the day cleaning up dry chem powder.
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May 2, 2012 14:49
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CO2 or Halon will just drop out the bottom of the engine bay. It might be enough to extinguish the initial flames, but if you have a flareup you are hosed, or if it drops out too fast. Edit: If I had the money to throw at extinguishers, I'd use halon first for the potential ease of cleanup, with the backup dry chemical.
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May 2, 2012 15:20
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Godholio posted:CO2 or Halon will just drop out the bottom of the engine bay. It might be enough to extinguish the initial flames, but if you have a flareup you are hosed, or if it drops out too fast. The primary mechanism of extinguishment for CO2 and Halon/Halotron when used in an extinguisher (i.e. not a sealed room system) is cooling, followed by very temporary oxygen displacement. It doesn't matter that it "drops out" of the engine bay as it's not being used in that manner. This is why on clean agent room-type systems the Halotron simply drops in from deluge nozzles, where extinguishers of the same type have cones on them to work like an expansion valve.
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May 2, 2012 15:25
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Motronic posted:The primary mechanism of extinguishment for CO2 and Halon/Halotron when used in an extinguisher (i.e. not a sealed room system) is cooling, followed by very temporary oxygen displacement. It doesn't matter that it "drops out" of the engine bay as it's not being used in that manner. Yeah, I ended up using it to put out a fire when I was doing a chemistry experiment. It worked EXTREMELY well, I also had a CO2 extinguisher but the Halon was closer and worked faster. I have a smaller Halon extinguisher I have by the basement door because of all the engine cleaner and fuels I have down there.
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May 2, 2012 17:46
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There's more than one "Halon", remember, so check exactly what you're using, especially if it's in an enclosed space.
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May 2, 2012 18:01
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Das Volk posted:I'm just going to leave this here Punching three holes into the door of an R34 was a far greater crime than blowing up that thing.
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May 2, 2012 18:02
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InitialDave posted:There's more than one "Halon", remember, so check exactly what you're using, especially if it's in an enclosed space. Yes. It was used in a hood so it was well ventilated.
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May 2, 2012 18:06
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Ridge_Runner_5 posted:Punching three holes into the door of an R34 was a far greater crime than blowing up that thing. Surely the doors on the GT-R are the same as on any two-door R34?
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May 2, 2012 18:46
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Continuing the fire extinguisher talk, I fill and test Ansul Inergen fire extinguishers as part of my job. They are basically Halon replacements that are non ozone depleting. Youtube has a bunch of videos showing Inergen systems. Some of the systems I fill and test for are massive. This batch is 80 cylinders and is being installed somewhere in Buffalo NY. The gas mixture ratio has to be pretty exacting in order for the system to be safe for humans and to work as intended. Size comparison of one of the cylinders compared to a normal 300 cf size oxygen cylinder. 
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May 3, 2012 03:04
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Woah, what PSI are those bad boys kept at and what is the operating pressure of the system. I used to work in a scuba shop where we would fill 100cf (80cf is the norm) to 3k, 3.3k max. This would all be regulated down to 125-150psi at the regulator. We did have some guys decide to stack burst disks ( over pressure blow out disks) to get the tanks to 3.8k but I didnt hang around to watch those get filled.
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May 4, 2012 03:28
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Timbo posted:Woah, what PSI are those bad boys kept at and what is the operating pressure of the system. First off those guys are loving idiots. There are DOT stamps on cylinders for a reason. The oxygen 300 actually has more pressure in it than the Inergen cylinders. The oxygen is filled to 2640 @ 70⁰F. Although during the filling process they will get to over 3000 psi. The Inergen in the pictures are at 2265 @ 70⁰F. We also have cylinders that are filled to 3500, 4500, and 6000 psi @ 70⁰F. I don't have a picture of the Inergen valves but those have an actuator pin that when pressed dumps all of the gas from the cylinder.
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May 4, 2012 03:48
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Farside posted:I don't have a picture of the Inergen valves but those have an actuator pin that when pressed dumps all of the gas from the cylinder. That sounds like a fun way to spend a rainy afternoon... 
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May 4, 2012 06:41
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Sponge! posted:That sounds like a fun way to spend a rainy afternoon... 1. Attach fins and aerodynamic nose 2. ??? 3. Profit!
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May 4, 2012 07:44
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Sponge! posted:That sounds like a fun way to spend a rainy afternoon... I worked refilling dry chem extinguishers in high school. That poo poo is down right scary when something lets loose. The procedure for depressurizing an extinguisher before testing and refill is to slowly unscrew the head until it lets out the nitrogen and hope it doesn't make a loving mess or flat out fly off the cylinder (some old rear end heads had weak/shallow threads). I hated that job so much at the time.
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May 4, 2012 07:47
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^ Yikes! I would've figured they just pulled the pin and discharged them into some sort of recovery system.
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May 4, 2012 09:20
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Puddin posted:I'm sure this thread is an elaborate troll, but if not this guy needs some serious parking practice. http://forums.whirlpool.net.au/forum-replies.cfm?t=1908933 It's amazing how many university students' cars are parked like that at my work.
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May 4, 2012 09:31
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Bucephalus posted:^ Yikes! I would've figured they just pulled the pin and discharged them into some sort of recovery system. At the time it was a tiny shop and we didn't have a setup to discharge and recover dry chem. Letting the charge out keeps most of the powder in the extinguisher that way you don't need to empty it out if it isn't due for a hydrotest. This was like 10-12 years ago, so no idea if it's still done this way (or if there are any changes to the regulations concerning this stuff).
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May 4, 2012 09:42
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You Am I posted:It's amazing how many university students' cars are parked like that at my work. Sometimes people say gently caress it when they are just trying to park hungover as poo poo.
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May 4, 2012 10:22
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BlackMK4 posted:Sometimes people say gently caress it when they are just trying to park
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May 4, 2012 11:18
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Das Volk posted:I'm just going to leave this here I laughed out loud (not normal for me) when I saw that scene the first time.
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May 4, 2012 17:41
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I always figured that was the lovely off-brand tank exploding due to pressure+heat.
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May 4, 2012 18:52
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Bucephalus posted:^ Yikes! I would've figured they just pulled the pin and discharged them into some sort of recovery system. Non-getto shops do. What 8th-samurai described is quite dangerous and a massive OSHA violation.
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May 4, 2012 21:56
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Motronic posted:Non-getto shops do. What 8th-samurai described is quite dangerous and a massive OSHA violation. Yeah, it was a while ago so they probably do it differently now that they have a much larger shop and do more business. I actually can't find an OSHA regulation that requires a discharge and recovery system. The regs covering hydro testing just all say to use the manufactures recommendations on emptying and recharging (which frankly probably do say to use some sort of discharge system).
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May 5, 2012 07:09
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May 5, 2012 07:30
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mutt2jeff posted:You can't post that without some kind of backstory. 
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May 5, 2012 07:57
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Sponge! posted:That sounds like a fun way to spend a rainy afternoon... My last ship, the temperature in the smoke pit onboard was hitting 135+ while in the gulf. We had a CO2 extinguisher out there. After a few days the pressure built high enough that the pressure release let go, except it also shot the valve off the top of the bottle. Want to talk about scaring 40 sailors shitless? All I heard as a loud rear end bang, then the world turned white.
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May 5, 2012 08:33
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some texas redneck posted:You can't post that without some kind of backstory. All the backstory I have is that is was a Subaru engine with an incorrectly installed turbo.
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May 5, 2012 09:04
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mutt2jeff posted:That's loving brutal. I need to know how to replicate that. Tell me more.
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May 5, 2012 11:18
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mutt2jeff posted:So, what exactly were those kidneys before? Turbo parts? Valves? Piston pieces?
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May 5, 2012 19:50
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Guessing what's left of the piston after somebody kept driving it after it clearly had suffered a major malfunction.
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May 5, 2012 21:18
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That looks like a block, with a piston melted and separated in two, above a conrod twisted like a pretzel and broken in half. God drat
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May 5, 2012 21:22
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mutt2jeff posted:I want to know what kind of sounds this made.
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May 5, 2012 21:28
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haxality posted:I want to know what kind of sounds this made. I would guess all of them?
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May 5, 2012 22:22
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Youtube video of today still uploading - some of my friends took better ones during an actual test, this was just a fuckaround test while they were waiting for me to finish welding the nozzle/endcap onto the larger rocket engine. This is oxygen @ around 200psi and an acrylic plastic fuel grain threaded onto the end of the oxy supply line. https://www.youtube.com/watch?v=BvEH5RTfoRo Some pics of various ghetto rockets we built out of plumbing supplies at home depot, all running high pressure oxygen gas as the oxidizer:  Apparently regular aluminum stock isn't rocket nozzle grade. Who knew? Failure mode: combustion chamber pressure built up till it leaked between the chamber end and bolted-on nozzle. Heat built up till the aluminum lost its strength, then the weakest portion of the wall began blowing out right next to one of the mounting bolts till it simply blew the nozzle off.  Looks like we have some nozzle erosion too... who would have thought 200+ psi worth of oxygen burning an acrylic fuel grain would cause that kind of thing? (I expected this, but it proved the concept and now there's a reason to build the next rocket with steel or better)  This one is more of a fuel/oxidizer delivery system failure than a horrible mechanical failure, but it's neat. The oxygen tank ran out of oxygen and the rocket promptly went from creating a deafening roar and a significant amount of thrust to being more of a smoke machine, and quickly filled the entire yard with thick black smoke. The neighbors nearly called the fire department. My brother took a lot of decent pics with his real camera (all the above are from my cellphone) including one that he luckily got mid-failure, so there's a pretty good fireball and shower of molten metal in midair, and my friend Jack whose idea this whole ridiculous experiment was had his camera taking a video, so hopefully I'll have a full test video of the actual rocket (the aluminum one above) and some good shots of its timely death by tomorrow.
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May 6, 2012 01:31
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I love that in that video, everyone runs and hides except for Trent Reznor Jr. Can't wait for the real videos.
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May 6, 2012 02:22
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bully Victim turned tazer victim Jailhouse bully on the phone won't shut the gently caress up and let everyone else in the cell sleep. Gets tired of being told to quiet down by one sleeping guy and bully takes his frustration out on him. Problem is the guy the bully starts whuppin on jumps up off the floor where he is sleeping and just took a few licks and puts an rear end-whupping on the bully in return for the unwarranted assault. Guards respond with a taser just as the knockout punch to the bully is delivered. video volume warning http://www.youtube.com/watch?v=ld_8LDiLNyA
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May 6, 2012 18:17
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That taser functioned properly although it might have hit the wrong target.
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May 6, 2012 19:33
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