The development of propfan-powered aircraft has been observed with great interest. It is obvious that during cruising flight, the aircraft powerplant (propellers) cause a noise clearly perceivable on the ground. It is the audible frequency spectrum of the propfan powerplants relative to the high tip speeds that presents the problem. A flight test was conducted on 30 April, 1989 at the Frankfurt Airport. Results of the test flight are present.
En route noise of turboprop aircraft and their acceptability: Report of tests
1990-04-01
Conference paper
No indication
English
En Route Noise of Two Turboprop Aircraft
NTIS | 1990
|En route noise of two turboprop aircraft
NTRS | 1990
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