FIELD: measurement of force. SUBSTANCE: the method is characterized by the fact that helicopter is loaded to a weight whose value is a little lower than that of the supposed rotor thrust, and the average rate of climb is measured at altitudes above the zone of effect of ground proximity at engine operation in the take-off regime, as well as the wind speed. The rotor free thrust is determined by formula, the coefficients in which are determined in accordance with the main rotor momentum theory. EFFECT: simplified process of measurements.
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