초록 ▼

The blade includes at least one trailing edge swivelling air flow control flap, swivelling on the blade around an axis directed substantially along the span of the blade and the control flap, the swivelling of the control flap being controlled by an actuator gear mounted on the blade and including a

The blade includes at least one trailing edge swivelling air flow control flap, swivelling on the blade around an axis directed substantially along the span of the blade and the control flap, the swivelling of the control flap being controlled by an actuator gear mounted on the blade and including an actuator. The actuator includes a first rotating motor, the rotational speed of which corresponds to a frequency of swivelling of the control flap, and a second rotating motor which moves relative to each other two eccentrics mounted in series around the shaft of the first motor, the second motor rotating with one of the eccentrics, and a ring freely rotating around the eccentrics is driven in movements transmitted by a flexible arm transmission to the control flap. The frequency and amplitude controls of the swivelling of the air flow control flap are thus separated.

대표청구항 ▼

[ What is claimed is:] [1.] A rotary wing aircraft rotor blade, comprising: a span, a blade trailing edge. at least one trailing edge swiveling air flow control flap, said control flap being swivelled on the blade, in a blade part near the blade trailing edge, around at least one axis directed subst

[ What is claimed is:] [1.] A rotary wing aircraft rotor blade, comprising: a span, a blade trailing edge. at least one trailing edge swiveling air flow control flap, said control flap being swivelled on the blade, in a blade part near the blade trailing edge, around at least one axis directed substantially along the span of the blade and of the control flap, the swivelling of the air flow control flap being controlled by an actuator gear, mounted on the blade, and including at least one actuator wherein said actuator gear further includes means of separation of a frequency control and an amplitude control of the swivelling of the air flow control flap and two eccentrics in series, the second around the first, and the first eccentric of which is rotated by a first rotating motor around the axis of said first motor, at a rotational speed corresponding to a base frequency of the swivelling of the air flow control flap, and the second eccentric of which is centered on the axis of said first eccentric and controlled in angular position relative to said first eccentric and around the axis of said first eccentric, for the amplitude control of the swivelling of said air flow control flap, by at least one second rotating motor, rotating integrally with said first eccentric around the axis of said first motor, a ring being mounted rotating freely on said second eccentric, and connected to said air flow control flap by a transmission transforming the movements of said ring by said eccentrics in swivelling of the air flow control flap with an amplitude which is a function of the eccentricities and of the relative position of said two eccentrics and which is controlled by said second motor.