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Posted: 7/18/2014 12:39:13 AM EDT
[#1]
Yikes.
Looks like a AS365 |
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Posted: 7/18/2014 12:42:01 AM EDT
[#2]
God damn that thing was a dart. RIP crewmembers and pax. |
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Posted: 7/18/2014 12:51:39 AM EDT
[#3]
That looked like the angle cheesy movies CGI make helicopters crash, not real life.
Horrible 
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Posted: 7/18/2014 12:54:09 AM EDT
[#4]
That was not what I was expecting.. I am watching, hmmm where is the helo.. shoooop booom
 Damn.. that sucks, it seems it could have been a whole lot worse though.. Surrounded by buildings, a school, bus just went by... |
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Posted: 7/18/2014 1:02:05 AM EDT
[#5]
Not the first time; Here's a 2001 video of a ROK Army Chinook crashing after colliding with an ornament it was installing atop a bridge in Seoul.
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Posted: 7/18/2014 1:05:45 AM EDT
[#6]
Wow, that chopper was at full speed when it hit the ground. |
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Posted: 7/18/2014 1:21:25 AM EDT
[#7]
Saw a couple Hueys go in like that back in the day.
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Posted: 7/18/2014 4:13:01 AM EDT
[#8]
Wow. Was the main rotor system missing?
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Posted: 7/18/2014 5:04:56 AM EDT
[#9]
Quote HistoryQuoted: Wow. Was the main rotor system missing? Armchair quarterback questions: If it was, could the helo maintain right side up orientation? With the turbines and transmission on the top, I would think it would have a tendency to belly up in the event the main rotors departed the aircraft. If the main rotors went missing, would the tail rotor still be powered? If it was, wouldn't it cause severe yaw or a flat-spin in one direction?
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Posted: 7/18/2014 5:35:39 AM EDT
[#10]
Quote HistoryQuoted:
Armchair quarterback questions: If it was, could the helo maintain right side up orientation? With the turbines and transmission on the top, I would think it would have a tendency to belly up in the event the main rotors departed the aircraft. If the main rotors went missing, would the tail rotor still be powered? If it was, wouldn't it cause severe yaw or a flat-spin in one direction? Quote HistoryQuoted:
Quoted:
Wow. Was the main rotor system missing? Armchair quarterback questions: If it was, could the helo maintain right side up orientation? With the turbines and transmission on the top, I would think it would have a tendency to belly up in the event the main rotors departed the aircraft. If the main rotors went missing, would the tail rotor still be powered? If it was, wouldn't it cause severe yaw or a flat-spin in one direction? It depends on what was happening at the instant the main rotor separated and how many seconds until ground impact. But it'll always be ugly. I saw ZERO indications of MR separation in that 365 video. It's just hard to see the rapidly spinning rotor on video. (Especially from that distance, angle, and time) |
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Posted: 7/18/2014 6:04:22 AM EDT
[#11]
Maybe intentional, i.e., suicide. Maybe physiological event, e.g., heart attack or stroke. Maybe catastrophic failure of flight control (damage, e.g., bird strike, or fatigue).
Interested to know if that does have an FDR. OP, thanks for posting. |
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Posted: 7/18/2014 6:32:34 AM EDT
[#12]
The WX looks pretty bad.......I wonder what the ceiling was. If it was a 200 ft ceilings, and they were trucking along at 150 kts, that's about 100ft a second. If they got in an unusual attitude, it would only give them 2 second to pull up at the sight of the ground. Just a thought.
That aircraft should have had SAS, autopilot, hover hold, and all that fun stuff on it though. You just have to use, trust it, and know how to fly if/when it's not working. We just got SAS & autopilot in our helicopter--it's creepy letting it fly for you, but I'm amazed how well it works. |
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Posted: 7/18/2014 4:27:57 PM EDT
[#13]
Fuck.
Oh, the weather always sucks here in the ROK. |
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Posted: 7/18/2014 5:11:56 PM EDT
[#14]
If a blade comes off a helicopter while running at flight speed the aircraft will be destroyed immediately. So the rotor was intact.
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Posted: 7/18/2014 6:36:06 PM EDT
[#15]
Quote HistoryQuoted:
That aircraft should have had SAS, autopilot, hover hold, and all that fun stuff on it though. You just have to use, trust it, and know how to fly if/when it's not working. We just got SAS & autopilot in our helicopter--it's creepy letting it fly for you, but I'm amazed how well it works. Yea I went from a helicopter with just SCAS and not even force trim to one capable of flying itself on a whole flight plan, and shooting itself to a hover without touching anything... Anyway, like Morgan said, losing a blade causes so much dynamic imbalance that its game over. Im thinking it was a flight control issue or spacial D. Maybe a pilot had a heart attack and fell on the cyclic, because that was one hell of a dive. Sad. |
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Posted: 7/19/2014 5:19:18 AM EDT
[#16]
I understand that concept but if the entire main system (head) goes at once I think the airframe will, and has before, remained intact until impact.
Quote HistoryQuoted:
If a blade comes off a helicopter while running at flight speed the aircraft will be destroyed immediately. So the rotor was intact. |
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Posted: 7/19/2014 5:54:50 PM EDT
[#17]
It cannot leave intact. It will be unbalanced in the process of coming off if the aircraft is in flight. A few hundred tons even for a few milliseconds will shred the structure.
With the level roll and yaw attitude first guess is flight control problem, but it could be anything sine you only see a fraction of a second of flight |
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Posted: 7/19/2014 6:05:25 PM EDT
[#18]
Quote HistoryQuoted:
Fuck. Oh, the weather always sucks here in the ROK. I clicked on this thread hoping it wasn't a CH-47. |
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Posted: 7/19/2014 7:07:57 PM EDT
[#19]
I'm not sure if you are trolling but if not take a peek here...
http://www.aaib.gov.uk/cms_resources.cfm?file=/2-2011%20G-REDL.pdf Quote HistoryQuoted:
It cannot leave intact. It will be unbalanced in the process of coming off if the aircraft is in flight. A few hundred tons even for a few milliseconds will shred the structure. With the level roll and yaw attitude first guess is flight control problem, but it could be anything sine you only see a fraction of a second of flight |
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Posted: 7/19/2014 7:21:10 PM EDT
[#20]
Quote HistoryQuoted:
I'm not sure if you are trolling but if not take a peek here... http://www.aaib.gov.uk/cms_resources.cfm?file=/2-2011%20G-REDL.pdf Quote HistoryQuoted:
I'm not sure if you are trolling but if not take a peek here... http://www.aaib.gov.uk/cms_resources.cfm?file=/2-2011%20G-REDL.pdf Quoted:
It cannot leave intact. It will be unbalanced in the process of coming off if the aircraft is in flight. A few hundred tons even for a few milliseconds will shred the structure. With the level roll and yaw attitude first guess is flight control problem, but it could be anything sine you only see a fraction of a second of flight What's your point? He's talking about the result of shedding one main rotor blade which is always followed immediately by shedding the rest of them in a catastrophic manner. Your linked accident was the result of a catastrophic transmission failure resulting in the separation of the main rotor system that then immediately cut the tailboom off the helicopter (not that that made a difference at that point). There are ZERO indications of a main rotor event in that Korean Dauphin video. Zero. |
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Posted: 7/19/2014 7:36:17 PM EDT
[#21]
First, I don't know what happened in Korea. Secondly, my "point" is a rebuttal that a helicopter will likely not be not be "shredded" with the loss of the entire main rotor system. I suppose my mention of the entire head vs. one blade separation was not clear as posted above. I'm not sure how, however.
Quote HistoryQuoted:
What's your point? He's talking about the result of shedding one main rotor blade which is always followed immediately by shedding the rest of them in a catastrophic manner. Your linked accident was the result of a catastrophic transmission failure resulting in the separation of the main rotor system that then immediately cut the tailboom off the helicopter (not that that made a difference at that point). There are ZERO indications of a main rotor event in that Korean Dauphin video. Zero. Quote HistoryQuoted:
Quoted:
I'm not sure if you are trolling but if not take a peek here... http://www.aaib.gov.uk/cms_resources.cfm?file=/2-2011%20G-REDL.pdf Quoted:
It cannot leave intact. It will be unbalanced in the process of coming off if the aircraft is in flight. A few hundred tons even for a few milliseconds will shred the structure. With the level roll and yaw attitude first guess is flight control problem, but it could be anything sine you only see a fraction of a second of flight What's your point? He's talking about the result of shedding one main rotor blade which is always followed immediately by shedding the rest of them in a catastrophic manner. Your linked accident was the result of a catastrophic transmission failure resulting in the separation of the main rotor system that then immediately cut the tailboom off the helicopter (not that that made a difference at that point). There are ZERO indications of a main rotor event in that Korean Dauphin video. Zero. |
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Posted: 7/20/2014 3:51:45 AM EDT
[#22]
Everybody's an expert on the internet!
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Posted: 7/20/2014 5:47:38 PM EDT
[#23]
ok did it look like the tail rotor was missing? its moving so fast to tell for sure. horrible none the less
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Posted: 7/20/2014 8:51:09 PM EDT
[#24]
Quote HistoryQuoted:
ok did it look like the tail rotor was missing? its moving so fast to tell for sure. horrible none the less Tail rotor is built into the vertical portion of the tail, on that model. Loss of tail rotor effectiveness tends to cause a spin, which didn't seem to be happening in the video. With that little evidence, it's hard to guess at what happened. |
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Posted: 7/20/2014 9:08:36 PM EDT
[#25]
Quote HistoryQuoted:
Tail rotor is built into the vertical portion of the tail, on that model. Loss of tail rotor effectiveness tends to cause a spin, which didn't seem to be happening in the video. With that little evidence, it's hard to guess at what happened. Quote HistoryQuoted:
Quoted:
ok did it look like the tail rotor was missing? its moving so fast to tell for sure. horrible none the less Tail rotor is built into the vertical portion of the tail, on that model. Loss of tail rotor effectiveness tends to cause a spin, which didn't seem to be happening in the video. With that little evidence, it's hard to guess at what happened. In a hover yes, in forward flight not so much. (for a 365 anyway) |
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Posted: 7/21/2014 5:09:36 PM EDT
[#26]
Quote HistoryQuoted:
In a hover yes, in forward flight not so much. (for a 365 anyway) Quote HistoryQuoted:
Quoted:
Quoted:
ok did it look like the tail rotor was missing? its moving so fast to tell for sure. horrible none the less Tail rotor is built into the vertical portion of the tail, on that model. Loss of tail rotor effectiveness tends to cause a spin, which didn't seem to be happening in the video. With that little evidence, it's hard to guess at what happened. In a hover yes, in forward flight not so much. (for a 365 anyway) Good point. With enough forward airspeed, you can maintain controlled flight. UH-1s tend to spin below about 60Kts. So, again, we're left with a video of the final impact, but not really enough to say what caused it. |
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Posted: 7/21/2014 11:55:53 PM EDT
[#27]
Just watched the video again. Anyone notice the debris trailing the helo after the crash?
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Posted: 7/22/2014 1:25:29 AM EDT
[#28]
Quote HistoryQuoted:
Just watched the video again. Anyone notice the debris trailing the helo after the crash? I did see two square panels falling from the sky. They looked to be very light as they fell like a leaf. |
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