ROSAMOND, CA, USA
N169RM
85 MANISTA KB-2
DURING A LOCAL AREA FLIGHT THE PILOT WAS OBSERVED CIRCLING OVER A RESIDENTIAL AREA AT A LOW ALTITUDE. THE PILOT INITIATED AN ABRUPT TURNING MANEUVER WHILE CHANGING THE EXPERIMENTAL GYROPLANE'S PITCH ATTITUDE. ROTOR RPM DECREASED AND THE BLADES BEGAN EXCESSIVELY FLAPPING. THE BLADES COLLIDED WITH AND SEVERED THE RUDDER AND PROPELLER. THEREAFTER, THE GYROPLANE NOSED DOWN AND DESCENDED (UNCONTROLLED) INTO A CITY STREET.
THE PILOT'S FAILURE TO MAINTAIN MAIN ROTOR RPM ADEQUATE TO AVOID FLAPPING. FACTORS WHICH CONTRIBUTED TO THE ACCIDENT WERE RELATED TO THE PILOT'S PERFORMANCE OF AN EXCESSIVELY ABRUPT MANEUVER.
Source: NTSB Aviation Accident Database
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