On the Recalculation of the Results of Laboratory and Static Tests of Propeller-Driven Power Plants on with Flight Conditions

The problem of recalculation of the results of laboratory and static tests of propeller-driven power plants on with flight conditions is considered. The paper presents a comparative analysis of the acoustic characteristics of the AN-2, YAK-18T and MAI-223M light propeller-driven airplanes obtained in flight and static conditions. Also in the work, the results of laboratory acoustic tests in the presence of an incoming flow of the Ptero-GOVAV were compared with the data of the in-flight experiment. The measurement results are reduced to one distance.