CPC B64C 27/39 (2013.01) [B64C 27/35 (2013.01); B64C 27/48 (2013.01)] | 20 Claims |
1. A rotor assembly for a rotorcraft, the rotor assembly comprising:
a rotor hub, comprising rotor-blade supports; and
rotor-blade assemblies, each coupled to a respective one of the rotor-blade supports;
wherein:
the rotor hub has a rotation axis about which the rotor hub has a rotational symmetry of order N;
the rotor-blade supports are N in number; and
each of the rotor-blade assemblies comprises:
a flap axle, extending through the respective one of the rotor-blade supports and having a central flap-axle axis;
a hub connector, coupled to the respective one of the rotor-blade supports via the flap axle, pivotable relative to the respective one of the rotor-blade supports about the central flap-axle axis, and defining a central hub-connector axis that is perpendicular to the central flap-axle axis;
a rotor blade, coupled to the hub connector, pivotable relative to the hub connector about the central hub-connector axis, and, together with the hub connector, pivotable relative to the respective one of the rotor-blade supports about the central flap-axle axis; and
a torsion strap extending along the central hub-connector axis, having a first end, coupled to the rotor blade, and a second end, through which the flap axle passes.
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