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A 219-hour statistical sample of data was collected from four UH-1B helicopters performing normal field mission assignments covering a period of 3 months. The parameters monitored were: airspeed, altitude, outside air temperature, acceleration at the aircraft center of gravity, main rotor rpm, collective stick position, longitudinal cyclic stick position, and engine torque. Supplementary information for each flight included barometric pressure, type of mission, and aircraft gross weight.

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