Patent ID: 7275913
Filing Date: 2007-10-02
Classification: B64C

Abstract:
1. A rotor having a radius and comprising: a rotor head; and at least two rotor blades connectable to the rotor head, each rotor blade including a blade neck having a blade-connector region including two auxiliary flapping hinges spaced apart from one another in a radial longitudinal direction of the rotor blade and a flexurally elastic blade-neck region forming a virtual flapping hinge disposed substantially between the two auxiliary flapping hinges, the virtual flapping hinge being deformable in a flexurally elastic and curved fashion in response to a flapping motion, wherein the blade-connector region includes at least one blade-connector arm and wherein respective blade-connector arms of the at least two rotor blades are joined to each other and overlap each other at a subregion, and wherein one of the auxiliary flapping hinges is disposed at the subregion.