Dynamometer-stand Investigation of the Muffler Used in the Demonstration of Light-airplane Noise Reduction

·
· National Advisory Committee for Aeronautics
Ebook
29
Pages

About this ebook

The attenuation characteristics of the muffler used in the demonstration of light airplane noise reduction were investigated on the ground dynamometer stand at the Langley full-scale tunnel. Sound, back pressure, and engine power output were measured. The ground tests indicated that a reduction of 10 to 15 decibels was to be expected from this muffler.

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