NASA REDUCES AIRPORT NOISE BY TESTING AIRFRAME IMPROVEMENTS

US space agency NASA has tested aircraft design technologies reducing commercial airliners noise generated by airframes by 70%. Tests conducted at NASA’s Armstrong Flight Research Center, California, focused on landing gear and wing flaps. Regarding landing gear, when wheels are down, airflow can get pulled into resulting cavities, creating noise. NASA installed chevrons fronting the cavity with a sound-absorbing foam on the trailing wall, plus a net across the cavity opening. This altered the airflow and reduced noise. NASA also replaced wing flaps with gaps ...


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