United States Department of Transportation
i
Measured Engine Installation Effects of Four Civil Transport Airplanes.
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2001-10-28
[PDF-185.33 KB]
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Abstract:The Federal Aviation Administration's Integrated Noise Model (INM) is one of the primary tools
for land use planning around airports [1]. The INM currently calculates airplane noise lateral
attenuation using the methods contained in the Society of Automotive Engineer's Aerospace
Information Report No. 1751 (SAE AIR 1751) [2]. Researchers have noted that improved lateral
attenuation algorithms may improve airplane noise prediction [3]. The authors of SAE AIR 1751
based existing methods on empirical data collected from flight tests using 1960s-technology
airplanes with tail-mounted engines. To determine whether the SAE AIR 1751 methods are
applicable for predicting the engine installation component of lateral attenuation for airplanes with wing-mounted engines, the National Aeronautics and Space Administration (NASA)
sponsored a series of flight tests during September 2000 at their Wallops Flight Facility [4]. Four airplanes, a Boeing 767-400, a Douglas DC-9, a Dassault Falcon 2000, and a Beech KingAir,
were flown through a 20 microphone array. The airplanes were flown through the array at
various power settings, flap settings, and altitudes to simulate take-off and arrival configurations. This paper presents the preliminary findings of this study.
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