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="

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 ***

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 ***

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 ***

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.

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.

wrote:
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.


Just speculation on my part as well. Having never experienced settling
with power or even seen it, this looks like what settling with power
might look like when the pilot did not have sufficient power to pull out
of it.

--

boB
Wing 70

U.S. Army Aviation (retired)
Central Texas - 5NM West of Gray Army Airfield (KGRK)