Patent ID: 8915464
Filing Date: 2014-12-23
Classification: B64C

Abstract:
1. A long-range and high-speed aircraft comprising: a fuselage extending longitudinally in an anteroposterior plane (P a rotary wing having two contrarotating main rotors arranged in tandem above said fuselage, the two contrarotating main rotors including a front main rotor being carried by said front portion and a rear main rotor being carried by said rear portion; at least one propulsion member; and a power plant for delivering power to said main rotors and to each propulsion member, the power plant comprising a first engine and a second engine, each propulsion member being associated with at least one of the first engine and the second engine; wherein each propulsion member is carried by said rear portion and said aircraft includes an interconnection system providing a permanent connection between said power plant and said rotary wing, except in the event of a failure or during training, the interconnection system including a mechanical assembly having a front main gearbox driving a mast of the front main rotor, a rear main gearbox driving a mast of the rear main rotor, and at least one shaft connecting the front gearbox to the rear gearbox, the interconnection system further including a first drive train connecting the first engine to the mechanical assembly and a second drive train connecting the second engine to the mechanical assembly, said aircraft having differential control means for controlling the cyclic pitch of the blades of said main rotors to control the aircraft in yaw, each propulsion member having an associated clutch controlled by a controller to enable the propulsion member to be disconnected from the power plant.