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The solution to needing valve pockets on a piston is not CUT THEM YOURSELF! 
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Sep 6, 2018 15:45
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Nonsense, just use a die grinder instead of an angle grinder
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Sep 6, 2018 16:11
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Slavvy posted:That isn't the first time someone's died there, albeit not explosively.
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Sep 7, 2018 00:48
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nmfree posted:The Something Awful Forums › Discussion › Automotive Insanity › Mechanical Failures: That isn't the first time someone's died there, albeit not explosively Seconded.
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Sep 7, 2018 01:52
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Wow how could that have happened I have no idea  Sure looks like someone shot a buillet of roughly .308 or flathead screwdriver proportions into my stabilator [We accept payment in cash or credit] EvenWorseOpinions fucked around with this message at 06:51 on Sep 8, 2018 |
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Sep 8, 2018 06:48
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Sep 8, 2018 07:18
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That sure looks like a bullet hit given how much paint has flaked off (high energy impact), and the exit side could be vertical because the projectile has started to tumble. So yeah is right.
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Sep 8, 2018 09:36
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EvenWorseOpinions posted:Wow how could that have happened I have no idea If you have even a vague idea of where that may have happened, please let your FSDO know. gently caress rednecks.
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Sep 8, 2018 13:07
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EvenWorseOpinions posted:Wow how could that have happened I have no idea Having seen ballistic damage to numerous automobiles and buildings, I agree (though can’t comment on caliber). This was in flight, or parked? Any idea, if you can say?
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Sep 8, 2018 13:12
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Sorry I forgot to mention the important thing that the first picture is the entrance and is on top of the stabilator, the second picture is the exit from the bottom of the stabilator. I am not a ballistics expert but I don't think he got shot from the plane above him. Yesterday I was pretty sure it was a flathead screwdriver and the big hammer from someone who decided they didn't like him but I think that should have bent the surrounding metal more so I'm back to assuming it was a meteor E: Pilot noticed it on preflight so could have been any time between then and his previous preflight, but considering above I assume ground I would be taking it a lot less lightheartedly if there was any reason to suspect he was shot in flight EvenWorseOpinions fucked around with this message at 13:22 on Sep 8, 2018 |
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Sep 8, 2018 13:18
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When parked, is the stabilator is hanging down? Is there any other part of the airframe ahead of the tail that would be in the way of trajectory? I have my doubts that a screwdriver+hammer would chip the paint that far out on the entrance side. Do people hunt near the airport, perhaps? A missed shot nearing spent velocity might do that; the slug would be nearby, though. PainterofCrap fucked around with this message at 13:50 on Sep 8, 2018 |
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Sep 8, 2018 13:48
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Dumbasses do shoot guns straight up, and those bullets come down eventually
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Sep 8, 2018 13:57
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PainterofCrap posted:When parked, is the stabilator is hanging down? Is there any other part of the airframe ahead of the tail that would be in the way of trajectory?  This is roughly its resting orientation with trajectory. The exit is indeed aft of the entrance as indicated. Don't know anything about its home airport I dunno about the paint chipping, I'd think a bullet would be likely to chip less paint considering the small amount of energy it actually imparts to the surface, relative to say, banging a bunch on it with a screwdriver, but I don't know if I buy the screwdriver either because you'd think the metal around the entrance would be bent inwards more. The Door Frame posted:Dumbasses do shoot guns straight up, and those bullets come down eventually Terminal velocity on bullets isn't that fantastic if mythbusters is to be believed, I don't buy that someone shot it straight up and it managed to penetrate through the top and bottom. Pilot said he looked everywhere for a bullet and didn't find anything, I don't know if he thought to check for chipping on the ground if he was parked on concrete. I think I have to default to assuming it was a bullet. What I didn't think to check was whether or not the bullet actually penetrated out through the bottom, there's a small possibility it didn't make it all the way through and rebounded back inside the stabilator, but that's kind of a long shot.
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Sep 8, 2018 14:51
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EvenWorseOpinions posted:but that's kind of a long shot. I mean, look where we are already. 
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Sep 8, 2018 15:00
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737 frames are shipped via rail car from Wichita to Renton, wa and several planes per year are shot up
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Sep 8, 2018 17:25
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My wife's car started having a mold and moisture problem in the trunk some years ago. While taking the wet headliner down a bullet fell out. It had come down and penetrated the roof but was caught by the insulation/headliner. I hadn't noticed the hole because it was right by the roof rack. It makes me feel a little better about the occasional gunshot we hear in town to think they are just going up and not straight at someone. The point being if a falling bullet will penetrate one layer of steel roof it will probably do two layers of aircraft skin.
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Sep 8, 2018 17:35
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BraveUlysses posted:737 frames are shipped via rail car from Wichita to Renton, wa and several planes per year are shot up What do they do about it? Just patch it?
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Sep 8, 2018 17:42
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BraveUlysses posted:737 frames are shipped via rail car from Wichita to Renton, wa and several planes per year are shot up And sometimes a few wind up in a river in Montana.
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Sep 8, 2018 17:54
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That hole seems pretty ragged for a bullet and a bullet falling at terminal velocity probably wouldn't make more than a dent, screwdriver sabotage seems more likely.
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Sep 8, 2018 18:34
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Slim Pickens posted:That hole seems pretty ragged for a bullet and a bullet falling at terminal velocity probably wouldn't make more than a dent, screwdriver sabotage seems more likely. A bullet falling at terminal velocity can do a lot of damage. There was a story a couple years back about a kid killed in church by a stray bullet that hit him after crashing through the ceiling. https://www.wsbtv.com/news/falling-bullet-kills-4-year-old-boy-in-dekalb/241790803
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Sep 8, 2018 18:40
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Deteriorata posted:A bullet falling at terminal velocity can do a lot of damage. There was a story a couple years back about a kid killed in church by a stray bullet that hit him after crashing through the ceiling. Unless the person who fired that bullet was standing just outside the church, that's not a bullet falling at terminal velocity, that's a bullet in a ballistic arc that's still carrying substantial horizontal velocity.
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Sep 8, 2018 18:46
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Could someone working on a hanger roof or lighting etc drop something long and heavy like a prybar that would punch through?
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Sep 8, 2018 18:47
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InitialDave posted:Could someone working on a hanger roof or lighting etc drop something long and heavy like a prybar that would punch through? Probably? We have a shaft that's 300 feet straight down where I work and the claim of the tour guides is that a screwdriver dropped from that height will penetrate steel (who knows how thick a steel sheet and obviously this requires it land point down). I am skeptical myself but I assume someone did the math. 
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Sep 8, 2018 18:49
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xzzy posted:Probably? I have some steel shim-stock that i can penetrate with a ballpoint pen anyway i did the math for you, assuming a 250-gram screwdriver with a handle 25mm in diameter that falls without tumbling, and i even worked it out with drag (Cd = 0.82, long cylinder). The terminal velocity is 41m/s after a 4.4 second fall, for a kinetic energy of 210J, or about 30% less energy than a .22LR bullet. Comparable to an old pistol cartridge from like the 1890s. So yeah, it'll go through thin sheet metal and it'll kill you if it lands on your head, but it's not like gonna blast a hole in the roof of a tank of anything Sagebrush fucked around with this message at 19:11 on Sep 8, 2018 |
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Sep 8, 2018 19:08
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Sagebrush posted:I have some steel shim-stock that i can penetrate with a ballpoint pen That's legal in Tijuana, did you know that?
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Sep 8, 2018 19:13
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Wouldn’t that stabilator be made of aluminum? And a falling bullet tumbling, made of perhaps lead but also could be steel core or jacketed. Does that change anything?
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Sep 8, 2018 21:36
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Sagebrush posted:I have some steel shim-stock that i can penetrate with a ballpoint pen lol physics nerd
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Sep 9, 2018 01:23
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Sagebrush posted:I have some steel shim-stock that i can penetrate with a ballpoint pen I'm having a hard time wrapping my head around this math. I guess I'm comparing the the energy from a falling .22LR round versus a perfect falling screwdriver?
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Sep 9, 2018 01:35
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C-Bangin' it 
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So I went and googled a bunch of formula calculators, they are indicating that a 22LR falling at terminal velocity carries about 9.6 joules, a .308 carries about 52 joules, a .50 cal carries about 418 joules, all of those discounting the possibility of tumbling interfering with airflow. I don't know how this translates to the possibility of punching through two layers of what is probably .040 aluminum.
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Sep 9, 2018 02:06
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This dude took the exit a little too fast and hit the outside cement guardrail and somehow that led to his car bursting into flames. What the gently caress? https://giant.gfycat.com/AliveScratchyElectriceel.webm
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Sep 9, 2018 02:13
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Under the bonnet you have electricity, gasoline, oil, and all sorts of totally-not-flammable* plastics. It is genuinely impressive to me that more front-end accidents don't result in engine bay fires. *: Unless you get them hot enough by, say, exposing them to a gasoline fire.
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Sep 9, 2018 02:19
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Inflammable means flammable? What a country.
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Sep 9, 2018 02:22
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IPCRESS posted:Under the bonnet you have electricity, gasoline, oil, and all sorts of totally-not-flammable* plastics. also it was a chrysler, not entirely surprising it was in poor mechanical condition
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Sep 9, 2018 02:29
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Cojawfee posted:Inflammable means flammable? What a country. And flammable means flammable too!
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Sep 9, 2018 02:43
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IPCRESS posted:Under the bonnet you have electricity, gasoline, oil, and all sorts of totally-not-flammable* plastics. Mostly because it's been common place since the late 1980s to have cutoff mechanisms build into the engine control system somewhere. For instance: Audi's for the 1980s trigger the fuel pump 5 seconds per spark. So if you have an accident significant enough to cut the engine, the pump shuts off. Most modern cars have a fuel cutoff linked to the air bag control module, so if the bags deploy, it disables the fuel pump.
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Sep 9, 2018 02:59
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I thought most cars relied on an inertial cut-off switch to kill the fuel pump, one that triggers at a certain g-force and is resetable? It seems to me it would suck to be in a minor collision that caused you to not be able to pull over to the side of the road
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Sep 9, 2018 03:28
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Elviscat posted:I thought most cars relied on an inertial cut-off switch to kill the fuel pump, one that triggers at a certain g-force and is resetable? It seems to me it would suck to be in a minor collision that caused you to not be able to pull over to the side of the road Some of them reset if you recycle the key.
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Sep 9, 2018 03:44
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Cojawfee posted:What do they do about it? Just patch it? Non-conforming condition: repair per blah blah blah spec yup Significantly easier than patching a hole on a 787
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Sep 9, 2018 03:52
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BraveUlysses posted:Non-conforming condition: repair per blah blah blah spec yup Just slap a doubler on it it'll be fiiiiine
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Sep 9, 2018 04:50
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Looks like a Stratus, which have the battery in the left front wheelwell area.
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Sep 9, 2018 06:05
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