Sound pressures of first four harmonics of rotation noise from full-scale 2-blade propeller were measured and are compared with values calculated from theory: comparison made for space distribution with constant tip speed, and for fixed space angles with variable tip speed; curves given showing effect of number of blades on rotation noise. (see also Acoustical Soc Am -- J v 12 n 1 July 1940 p 173-82)
Propeller rotation noise due to torque and thrust
Nat Advisory Committee Aeronautics -- Tech Note
1940
14 pages
4 Supp Sheets, Bibliography
Report
English
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Propeller rotation noise due to torque and thrust
TIBKAT | 1940
|Propeller rotation noise due to torque and thrust
NTRS | 1940
|Propeller Rotation Noise Due to Torque and Thrust
NTIS | 1940
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