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N7064U accident description

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Crash location 38.191389°N, 90.385833°W
Nearest city Festus, MO
38.220610°N, 90.395954°W
2.1 miles away
Tail number N7064U
Accident date 20 Oct 2013
Aircraft type Wohaska John Parsons Stiles Gyro
Additional details: None

NTSB Factual Report

The sport pilot reported that days prior to the accident flight, he adjusted the propeller and re-installed it without testing its performance. On the accident flight, he departed the runway and remained in ground effect until he reached 50 mph, then began a climb. As he flew the gyroplane to the south, the surrounding terrain elevation decreased and the pilot thought he was climbing. The engine was operating about 6,300 rpm and the airspeed was 40 mph; the engine develops maximum horsepower at 6,750 rpm and the best climb speed is 45 mph. The pilot initiated a left turn to land in a field or back at the airport, but the wind pushed the gyroplane and the pilot lost control. The gyroplane impacted the ground and sustained substantial damage to the tube frame, vertical tail, and rotor blades. The pilot reported no preimpact mechanical malfunctions or failures that would have precluded normal operation.

NTSB Probable Cause

The pilot's improper propeller adjustment, which resulted in decreased performance and a loss of aircraft control.

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