In order to establish criteria for the regulation of propfan aircraft engine noise emissions, measurement tests of overhead flights of a METRO-3 and a FOKKER-50 aircraft were performed. The decibel levels captured by the ground car microphone are tabulated according to the height of the microphone from the ground as the recording vehicle followed the aircraft through the test flight patterns. Microphone heights of 1.5 and 10 meters from the ground are recorded and correlated to the flight altitudes of the aircraft, which ranged from 5182-6401 meters.
Noise Measurements of Turboprop Airplanes at Different Overflight Elevations
1990
35 pages
Report
No indication
English
Characteristics of Propellers for Turboprop Airplanes
SAE Technical Papers | 1952
|Characteristics of propellers for turboprop airplanes
Engineering Index Backfile | 1952
|Thunderstorm Overflight Program
NTRS | 1980
|Comparison of advanced turboprop and turbofan airplanes
NTRS | 1983
|