Patent ID: 7462015

Claim:
A rotorcraft rotor with hinged blades, the rotor comprising: a hub; a plurality of blades hinged to flap relative to the hub; bottom abutments ( 21 ) of the hub, and bottom abutments ( 20 ) of the blades suitable for co-operating with the bottom abutments of the hub; and top abutments ( 15 ) of the hub, and top abutments ( 16 ) of the blades suitable for co-operating with the top abutments of the hub; the top abutments of the hub being movable between a deployed position in which they extend facing the top abutments of the blades, and a retracted position in which they are offset angularly away from the top abutments of the blades, the rotor further comprising locking means for locking the top abutments ( 15 ) of the hub in the deployed position to prevent the top abutments of the hub being retracted in untimely manner, and inertial means for releasing the top abutments of the hub and suitable for deactivating the locking means for locking the top abutments of the hub in the deployed position.