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Old 7th Nov 2007, 11:57
  #105 (permalink)  
NickLappos
 
Join Date: Apr 2003
Location: USA
Age: 75
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The complex situation looks like this to me:

1) Pilot gets slightly disoriented and gets way too slow. Aircraft backs into an OGE hover that is beyond its power capability.

2) The added power needs of the OGE hover cause the aircraft to descend rapidly as it slows.

3) the hover also is into a fairly strong wind at the tail, and the pilot is too slow applying pedal to correct it. The aircraft whips around to the right.

4) The pilot pulls up the collective and applies full left pedal as the descent and yaw are fully developed.

5) The collective/power that the pilot commands are beyond the engine's capability and the rotor rpm droops fairly low.

6) The low rpm makes the TR very ineffective, as well as the fact that the high main power now creates the need for even more anti-torque. The aircraft is entering VRS at the same time because the pilot is unable to arrest the descent with power alone. The pilot is confused and somewhat disoriented.

7) After flopping around through a thousand feet of basically uncontrolled descent, the pilot lowers the nose and the collective and accelerates out of the mess.


Cause: Pilot airspeed disorientation causing entering OGE hover inadvertently, misapplication of collective causing low rpm, loss of yaw control from low rpm

If you call it LTE, as the authorities did, you say the aircraft bit the pilot. If you call it poor airspeed control, you say the pilot bit the aircraft.
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