A mechanical independent blade control (MIBC) mechanism for controlling
the pitch of each of the blades of a rotor blade system or a main rotor
of a rotor aircraft independently of the other blades includes a
plurality of actuators disposed in the fuselage below the hub of the
rotor, each being operable to selectively control the pitch of an
associated one of the blades independently of the other blades, and a
plurality of mechanical linkages disposed within the annulus of the rotor
mast, each coupled between a blade and an actuator and operable to
transmit a force output by the actuator to a pitch horn fixed to an inner
end of the associated blade. The mechanism enables the direction of pitch
of each blade to be changed more than twice during one revolution of the
rotor.