Rotorcraft blade-vortex interaction controller

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United States of America Patent

PATENT NO 5478029
SERIAL NO

08439838

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Blade-vortex interaction noises, sometimes referred to as 'blade slap', are avoided by increasing the absolute value of inflow to the rotor system of a rotorcraft. This is accomplished by creating a drag force which causes the angle of the tip-path plane of the rotor system to become more negative or more positive.

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Patent Owner(s)

  • THE UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Schmitz, Fredric H Palo Alto, CA 3 6

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