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Whip cracks are mini sonic booms caused by the tip of the whip exceeding the speed of sound, so that's a possibility on the loud boom/crack! noise. Or maybe the cable striking the fuselage as it gets entangled in the rotor.
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Nov 23, 2011 05:28
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I can't get the video to play in IE or Chrome 
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Nov 23, 2011 06:06
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https://www.youtube.com/watch?v=6j52THFeUtI
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Nov 23, 2011 06:21
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You're right, I'm clearly seeing a cable swing towards the main rotor, then poo poo happens. Edit: The Youtube one is higher quality for me, and in the slow motion part it is quite visible now. Bondematt fucked around with this message at 06:30 on Nov 23, 2011 |
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Nov 23, 2011 06:24
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Bondematt posted:You're right, I'm clearly seeing a cable swing towards the main rotor, then poo poo happens. Looks like it might have got sucked in, you can see it slowly going towards the helicopter until the rotor catches it.
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Nov 23, 2011 06:27
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http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=10768105 Looks like they suspect a cable too.
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Nov 23, 2011 06:33
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You may or may not be able to view this one. Its from tv3 with a closer camera. http://www.3news.co.nz/VIDEO-Auckland-chopper-crash---full-video/tabid/309/articleID/233804/Default.aspx And http://www.3news.co.nz/Chopper-pilot-had-20-years-experience/tabid/309/articleID/233796/Default.aspx They don't seem to have a official youtube channel so far. And you can see a dude underneath the helicopter jumping up to disconnect the lifting cable as it happens. Wibbleman fucked around with this message at 07:58 on Nov 23, 2011 |
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Nov 23, 2011 07:37
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So it was descending to remove the lift cable and the lift cable hit the main rotor and turned it into a bad day for the pilot. Glad he was so low when it happened. The high pitch whine at the end is just the engine running (and probably grinding against it's bearings) since it didn't get the message that it crashed, right?
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Nov 23, 2011 07:58
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Nitr0 posted:https://www.youtube.com/watch?v=6j52THFeUtI Thank you sir. Wow, the pilot actually ends up outside the aircraft for over a second. Probably messed up his pants pretty well.
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Nov 23, 2011 15:08
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Fire Storm posted:The high pitch whine at the end is just the engine running (and probably grinding against it's bearings) since it didn't get the message that it crashed, right? Pretty much.
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Nov 23, 2011 15:11
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Yeah that turbine's death whine is pretty great. It's like "NOOOOOOOOOOoooooooooooo whyyyyyyyyyygod"
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Nov 23, 2011 16:53
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Nitr0 posted:https://www.youtube.com/watch?v=6j52THFeUtI Holy poo poo. Is the pilot being helped off at the end? Rotor system failures at speed usually result in snapped necks for all crew.
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Nov 23, 2011 18:46
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It must be nice to be able to trivially decide that whatever you need to lift is ok for a helicopter instead of a crane. Helicopter is rarely the proper answer. Injured person? Helicopter. Air conditioning unit on a building too high and a city too crowded for a crane? Helicopter. (yes we have seen that video also not end well) Injured animals in odd places. Helicopter. Construction of a tree for a holiday which comes every year so it is not like they could not plan ahead of time? Crane. Holding my wee while I take a piss if I were Richard Branson or Dietrich Mateschitz. Helicopter, then the right answer is do everything with a helicopter. wilfredmerriweathr posted:Yeah that turbine's death whine is pretty great. It's like "NOOOOOOOOOOoooooooooooo whyyyyyyyyyygod" haha, yeah it does.
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Nov 23, 2011 19:01
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This is just disturbing. https://www.youtube.com/watch?v=gjyINdn0Fn8 http://www.youtube.com/watch?feature=player_embedded&v=gjyINdn0Fn8 Motronic fucked around with this message at 19:55 on Nov 23, 2011 |
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Nov 23, 2011 19:30
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Just put the entire url between the video tags, it'll sort it out.
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Nov 23, 2011 19:40
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Fayez Butts posted:Just put the entire url between the video tags, it'll sort it out. Yeah...that's not working. I got what you see there by just putting it between <video> tags. It added the type= and removed thge first part of the URL. Odd...I just posted a video yesterday that same way and it worked.
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Nov 23, 2011 19:47
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You need to remove the embedded player query from the url for it to parse correctly.pre:http://www.youtube.com/watch?v=gjyINdn0Fn8 https://www.youtube.com/watch?v=gjyINdn0Fn8
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Nov 23, 2011 19:51
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Longinus00 posted:You need to remove the embedded player query from the url for it to parse correctly. Herp, derp. Thanks.
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Nov 23, 2011 19:56
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If you click on the share button it gives you a shortened URL.
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Nov 23, 2011 20:17
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buttcrackmenace posted:Rotor system failures at speed usually result in snapped necks for all crew. Huh?
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Nov 23, 2011 22:16
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The response from the emergency crew of that drag strip is a little slow. I'd thought that marshalls would be jumping over the fence to shut that car down. Plus pretty lovely work that the driver has no emergency shutdowns for the engine.
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Nov 23, 2011 22:42
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Phanatic posted:Huh? The violent snapping and shaking back and forth of a helicopter with an imbalanced rotor due to failure is more than enough to snap necks easily. Think about it - the rotor is attached to the top of the box you're sitting in, spinning at fuckall RPM, and then it suddenly decides to, say, lose a blade. It's like that video where a guy throws a brick into a dryer, but on a much larger scale.
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Nov 23, 2011 22:44
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You Am I posted:The response from the emergency crew of that drag strip is a little slow. I'd thought that marshalls would be jumping over the fence to shut that car down. from what I read he was knocked out by the crash, and unconscious for most of what followed. Remote engine kill switch would be required to get anywhere.
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Nov 23, 2011 23:03
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Motronic posted:This is just disturbing. So what happened there? Did he get knocked out with the pedal to the metal? Broken throttle cable? ^^^Oh okay.
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Nov 24, 2011 04:03
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yep. http://jalopnik.com/1969-firebird/ http://www.norcal1320.com/forums/showthread.php?s=5ec5db207bc366fd81e8326e2da8d34b&t=1191201864&page=2 Hell of a crash, I know I wouldn't want to go anywhere near that car to hit the killswitch with the throttle wide open.
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Nov 24, 2011 04:21
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drat, I didn't realize he locked the front wheels himself before he went into the wall (after which he was unconscious). Pretty awesome.
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Nov 24, 2011 06:41
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Jesus christ.. If he hadn't locked the front brakes, the damage it could have caused had it gone back the other way down the track would have been absolutely horrific.
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Nov 24, 2011 06:45
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Bondematt posted:I'm not sure if he caught a cable or just tried to lift something too heavy. The entire airframe seems to have failed though, so my bet is on too heavy. Engineer opinion here: suddenly jamming the rotor overhead will cause huge torsional accelerations through the hele frame. When you have a tail rotor trying to prevent that (i.e: creating a force to oppose it) you're going to see huge bending forces through the tail. I'm not surprised it buckled.
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Nov 24, 2011 11:27
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Yeah the motor tore it's way out of the airframe first. Hey, not sure if it counts as mechanical failure or not but I have some pictures of automotive press dies that have been left in the elements for 12 years & now need to run. I'll get them of my phone if anyones interested?
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Nov 24, 2011 19:18
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Cakefool posted:Yeah the motor tore it's way out of the airframe first. Hey, not sure if it counts as mechanical failure or not but I have some pictures of automotive press dies that have been left in the elements for 12 years & now need to run. I'll get them of my phone if anyones interested? I am interested! And if they are really bad, I'd love pics of the restoration process. Very curious as to what parts are needed again after 12 years.
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Nov 24, 2011 21:14
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Restoration is in progress, I'll keep you informed over the coming week. Background is these dies make the B-pillar reinforcement for a mid-90's EU hatchback, one set makes the 3-door, the other the 5-door. Final stock buildout happened years ago for these parts but someone hosed the maths up, or the owners are dumb enough to keep repairing them so we ran out of parts. Cue the call to 'press another 5 panels please' Cue us pissing ourselves laughing 'No really why are you laughing? can we have them by the end of the week?' More laughing. See, these dies, when 'retired' & if not taken by the European parts centre, get lobbed outside onto a strip of tarmac. This happened like 12 years ago, so this is the general state of things: All mixed up, no great order or reason to them. Anyway, the dies we need are pretty small, approx 5T each, 3 dies to a set, each set makes both the left & right hand parts for the relevant vehicle. So, lets crack one of these things open & see if the thick coat of grease preserved the chrome of the draw dies: [ W1, lower, the stationary part. [ W1 Pad, the bit that gets compressed on Nitrogen springs when the panel draws. [ W1 Upper Well that looks pretty good(3 door), what about 5 door? [ Oh poo poo. Well, let's concentrate on the 3 door, get one out of the way at a time... [ Right, so 1 out of the 6 dies looks like it's okay. it took a lot of beating to separate the pads, basically you hang the die from a crane & beat on it with mallets until it gives up. Opening these dies was hours of work. The next step is to polish the rust off until you get back to good chrome. Problem is we don't have good chrome anymore so we'll polish back to non-rusty steel, piss oil all over it & hit the panels once at a time. Also, the nitrogen spring systems will need a complete overhaul, but we can't get around that. We'll cap them off, gas it up & see if it holds. If so we'll hit, check pressure & hit again. For the 10 parts each we're making this is good enough. Technically the 'restoration' is a hack job due to cost. We just need to get a few off in adequate condition, not get it running at 25 strokes per minute in a transfer press. I'll keep you updated as we get on it. edit: Sorry for the fuzzy photos, oil is everywhere inside the press shop, I seem to have it on my phone lens. I'll try to get better photos in future. Also, we have 400+ of these dies just rotting away. cakesmith handyman fucked around with this message at 21:46 on Oct 20, 2018 |
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Nov 24, 2011 23:47
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Cakefool posted:Restoration is in progress, I'll keep you informed over the coming week.
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Nov 25, 2011 00:07
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We'll press 10-20 of each. Yes, we're a manufacturer. Funnily enough we're past the legal requirement to supply parts, it's more a corporate desire to please the customer thing. Edit: not counting labour, making 20 of each piece will/has already cost us 50 bucks per piece. cakesmith handyman fucked around with this message at 00:22 on Nov 25, 2011 |
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Nov 25, 2011 00:16
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While that is admirable in its own way, they seem to be missing the fact that, as a maker of new cars, pleasing a "customer" who self-evidently isn't a customer of new cars serves little business purpose. On Facebook a while back, someone posted "What's the difference between ignorance and indifference?" (The old "I don't know and I don't care" joke). My answer was "A sales department and an engineering department".
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Nov 25, 2011 00:35
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Cakefool posted:Restoration is in progress, I'll keep you informed over the coming week. Ugh. There is nothing worse then trying to recomission old equipment. I contract for a tire manufacturer and we just did a project restoring equipment that had been sitting in another decomissioned factory for 10 years. While it wasn't as badly rusted as that, about half the parts were robbed and they simply cut all the pneumatic lines. Throw in having to retrofit it with modern safety devices and it makes you want to shoot yourself. Someday I will do engineering for a company that only uses new equipment.
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Nov 25, 2011 01:01
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Crustashio posted:Someday I will do engineering for a company that only uses new equipment. Moving to china? 
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Nov 25, 2011 01:08
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InitialDave posted:While that is admirable in its own way, they seem to be missing the fact that, as a maker of new cars, pleasing a "customer" who self-evidently isn't a customer of new cars serves little business purpose.
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Nov 25, 2011 01:32
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I can remember doing environmental sampling in the old Mitsubishi factory in Adelaide a few years ago and seeing them getting the old dies out for the Magna's to make a stack more panels before they shut up shop- same with the 380's. Thats was a depressing place- the whole assembly section was shut down and cleared out and it was only the press shop and basic assembly shops still working, but everyone knew they were only on borrowed time at that stage.
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Nov 25, 2011 04:10
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InitialDave posted:While that is admirable in its own way, they seem to be missing the fact that, as a maker of new cars, pleasing a "customer" who self-evidently isn't a customer of new cars serves little business purpose. The person who buys this repair panel for a 15yr old car was never going to buy a new car from us period. All told I'll guess this fiasco will end up costing the same (to produce) as 1 or 2 new cars. The benefit will be 40 people who say to their friends "oh yeah, manufacturer were able to make my baby as good as new" difficult to measure I suppose.
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Nov 25, 2011 07:03
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Cakefool posted:The person who buys this repair panel for a 15yr old car was never going to buy a new car from us period. All told I'll guess this fiasco will end up costing the same (to produce) as 1 or 2 new cars. The benefit will be 40 people who say to their friends "oh yeah, manufacturer were able to make my baby as good as new" difficult to measure I suppose. Pans over, wheel falls off. "My baby!"
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Nov 25, 2011 07:13
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