1976-02-01

Noise Level Measurements on a Quiet Short Haul Turboprop Transport 760455

The paper describes the early experimental work, the flight test methods and the initial results of the noise measurements for a quiet STOL four engined turboprop aircraft.The target noise level of 95 PNdB at 500 ft sideline at takeoff set some six years earlier in the development process has been achieved.

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