Method and a device for optimizing the operation of propulsive propellers disposed on either side of a rotorcraft fuselage
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United States of America Patent
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May 29, 2012
Grant Date -
Sep 30, 2010
app pub date -
Mar 16, 2010
filing date -
Mar 27, 2009
priority date (Note) -
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Abstract
A method of optimizing the operation of left and right propellers disposed on either side of the fuselage of a rotorcraft including a main rotor. Left and right aerodynamic surfaces include respective left and right flaps suitable for being deflected, yaw stabilization of the rotorcraft being achieved via first and second pitches respectively of the left and right propellers, and the deflection angles of the left and right flaps are adjusted solely during predetermined stages of flight in order to minimize a differential pitch of the left and right propellers so as to optimize the operation of the left and right propellers, the predetermined stages of flight including stages of flight at low speed performed at an indicated air speed (IAS) of the rotorcraft that is below a predetermined threshold, and stages of yaw-stabilized flight at high speed performed at an indicated air speed of the rotorcraft greater than the predetermined threshold.
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