1970-02-01

Impact of Noise on Subsonic Transport Design 700806

The impact of noise regulations on the design and configuration development aspects of subsonic jet transports is examined for an aircraft which carries a prescribed payload a given range and operates within a given fixed field length. The normal design process, used to select wing loading, thrust loading, and aspect ratio, is first reviewed without consideration for noise and then examined considering noise. The sensitivity of these parameters for noise reduction is developed and compared with the noise reductions available through design of the engine and acoustic treatment of the powerplants. Finally, the overall tradeoff in takeoff gross weight or payload per EPNdB reduction for each of the design parameters is evaluated.

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