Landing Approach Airframe Noise Measurements and Analysis
Lasagna, Paul L. and Mackall, Karen G. and Burcham Jr., Frank W. and Putnam, Terrill W. (1980) Landing Approach Airframe Noise Measurements and Analysis. Technical Report NASA TP-1602, Research Engineering, NASA Dryden Flight Research Center.
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Abstract
Flyover measurements of the airframe noise produced by the AeroCommander, JetStar, CV-990, and B-747 airplanes are presented for various landing approach configurations. Empirical and semiempirical techniques are presented to correlate the measured airframe noise with airplane design and aerodynamic parameters. Airframe noise for the jet-powered airplanes in the clean configuration (flaps and gear retracted) was adequately represented by a function of airplane weight and the fifth power of airspeed. The airframe noise for all four aircraft in the landing configuration (flaps extended and gear down) varied with the fifth power of airspeed. However, this noise level could not be represented by the addition of a constant to the equation for clean-configuration airframe noise. The airframe noise of the JetStar and CV-990 in the landing configuration was approximately 10 effective perceived noise decibels below the current 1969 FAR Part 36 certification requirements.
| EPrint Type: | NASA Technical Publication |
|---|---|
| Keywords: | Acoustics, Flyover noise, Noise, Noise prediction |
| Subjects: | Aircraft/Project: AeroCommander Aircraft/Project: Boeing 747 Aircraft/Project: Convair 990 (01 - 09) Aeronautics: (01) Aeronautics - General Aircraft/Project: Boeing 727 Aircraft/Project: C-140 JetStar |
| ID Code: | 646 |
| Deposited On: | 09 Febuary 2006 |
| Additional Information: | 36 pages. |
