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#1
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Chopper crash
A Russian helicopter crew turned into a real emergency when the chopper
crashed. The accident happened today at an island between Russia and Japan when an amphibious helicopter landed in the water and tried to take off again. The chopper tipped over and its rotors hit the water, breaking it into pieces. 13 People were on board at the time. One died and three others were injured. The chopper was participating in an emergency drill with Japan at the time. Check out the video of this crash: http://www.groundhog.tv/apps/editor/staticplayer.jsp?clip=1147465288295.wmv"img src=" |
#2
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Chopper crash
Kinda looked like a Huey Tuck without the Huey!
my 2 cents wrote in message oups.com... A Russian helicopter crew turned into a real emergency when the chopper crashed. The accident happened today at an island between Russia and Japan when an amphibious helicopter landed in the water and tried to take off again. The chopper tipped over and its rotors hit the water, breaking it into pieces. 13 People were on board at the time. One died and three others were injured. The chopper was participating in an emergency drill with Japan at the time. Check out the video of this crash: http://www.groundhog.tv/apps/editor/staticplayer.jsp?clip=1147465288295.wmv"img src=" *** Posted via a free Usenet account from http://www.teranews.com *** |
#3
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Chopper crash
Huey tuck? Never heard of that before. Is is something they're prone to
under certain circumstances? "Ron Snipes" wrote in message .. . Kinda looked like a Huey Tuck without the Huey! my 2 cents wrote in message oups.com... A Russian helicopter crew turned into a real emergency when the chopper crashed. The accident happened today at an island between Russia and Japan when an amphibious helicopter landed in the water and tried to take off again. The chopper tipped over and its rotors hit the water, breaking it into pieces. 13 People were on board at the time. One died and three others were injured. The chopper was participating in an emergency drill with Japan at the time. Check out the video of this crash: http://www.groundhog.tv/apps/editor/staticplayer.jsp?clip=1147465288295.wmv"img src=" *** Posted via a free Usenet account from http://www.teranews.com *** |
#4
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Chopper crash
Huey Tuck:
If you read the book Chickenhawk, by Robert Mason, he describes it in detail there. You can find this book on ebay, or amazon. If you order it directly from him, he'll autograph it for you. I have one. I forget the website, but google search his name or chickenhawk. Basically like this, if you lift off in an extreme nose low attitude, the airflow hits the relatively flat upper deck, which pushed the nose down. He did some testing and determined the only way out is to like fly off a cliff where you can fly nose low and keep flying to recover. He tested it on pinacle LZ's I believe. If you do a google search for Huey Tuck, there is a little bit of info. I'm on the road, at the beach but have one of my two copies with me. Scanned and found this section. From Robert Mason's Chickenhawk, page 333. The Tension chapter: I experimented with the Huey Tuck that day. If the Huey was nosed over too far on takeoff, the wind resistance on top of the flat roof would force the nose even lower. The ship would then try to dive into the ground as it accelerated. IF this happened over level ground, you were trapped in a vicious circle. Pulling the cyclic back would not overcome the wind pressure on the roof. Pulling up on the collective to stay away from the ground only added power to the system, causing you to crash at a higher speed. If you don't do anything but curse, you hit the ground at a lower speed. Either way, you lost. I almost got caught in a Huey Tuck once, and I wanted to know just how far over was too far. I found out by simulating a level takeoff from a pinacle. I nosed over very hard and pulled enough pitch to keep the ship flying horizontal to the ground. I tested the cyclic, and the ship would not respond. I could feel it happening. Adding power only made it worse. When I could feel the trap and how I got into it, I knew I could never get into it by accident. I was experimenting with this over a valley, so all I had to do to recover was to dive. Ron *** Posted via a free Usenet account from http://www.teranews.com *** |
#5
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Chopper crash
Mi-14 crash
Here is a different video of the incident, http://today.reuters.co.uk/tv/videoC...89c000d6f4b10a It's in the Top News section, scroll along to the right nearly to the end. This one starts earlier and show the helicopter apparently taking off vertically from the water and then perhaps sufferning some failure that causes it to free fall into the sea. The video link originally posted just shows the descent. I notice thet the undercarriage which was retracted on the way down was deployed when the helicopter turned over in the water. The video appears to show the main and tail rotors slowing down although this visual effect will be affected by the frame rate and may not be real. FInally there appears to be a puff of smoke from near the rotor head area just after the machine settles. This could of course be from water thrown up on to the rotor or a hot component in the engine. It would seem an odd decision for the pilot to make to try to lift off again after such a heavy landing in any case so maybe the failed take off was not commanded. I am not sure how long this latter video may be available. |
#6
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Chopper crash
IMHO you can clearly see significant main rotor coning
on it's accelerated descent. A clear indication for loss of rpm. Looking at the vessel being tossed around by the waves just before the final crash, it is scary to see, how close the main rotor blades are getting to the water surface. So I could understand the pilots decision under pressure, to give it a try to get away, if he should not have seen any indication of a technical fault, after rpm has recovered. But this is PURE SPECULATION from my side. |
#7
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Chopper crash
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