A device for controlling a collective pitch and a cyclic pitch of rotor blades of a rotoreraft of a direct turbine driven type and contra-rotating coaxial rotor type (DTDR) includes: a lower rotor and an upper rotor that are mounted concentrically on a shared rotor shaft; a first plate, that is not rotatable, fastened to a structure of the rotorcraft and connected to an actuator that communicates collective pitch and cyclic pitch controls to it, the first plate being mounted so as to be movable in translation along the shared rotor shaft and to oscillate relative to the shared rotor shaft, via a lower ball joint mechanism; and a second plate, that is rotatable, housed on the lower ball joint mechanism so as to be always parallel to the first plate, the second plate being driven in rotation by a member connecting it to the lower rotor.

A rotor wing aircraft provided with a propulsion apparatus is disclosed. The aircraft has a rotating mast configured to rotate said rotor wing and the apparatus includes a pole mechanically connectable to the rotating mast of the aircraft. At one of the ends of the pole there is placed an electric turbine, powered by a battery, and configured to rotate the pole around an axis of the rotating mast in such a way that the rotation of the pole can be used to rotate the rotor wing. Preferably the pole is made of carbon fiber.

A rotor wing aircraft provided with a propulsion apparatus is disclosed. The aircraft has a rotating mast configured to rotate said rotor wing and the apparatus includes a pole mechanically connectable to the rotating mast of the aircraft. At one of the ends of the pole there is placed an electric turbine, powered by a battery, and configured to rotate the pole around an axis of the rotating mast in such a way that the rotation of the pole can be used to rotate the rotor wing. Preferably the pole is made of carbon fiber.

The invention relates to a blade of a high-pressure turbine of a turboshaft engine, comprising: an airfoil extending in a spanwise direction, terminating in an apex and comprising a suction wall and a pressure wall joined by a leading edge and joined by a trailing edge, an internal cooling circuit having only an upstream duct and a central chamber for cooling this blade by circulating air; the upstream duct and the central chamber being separately supplied with air; the upstream duct being dedicated to the cooling of the leading edge and the pressure wall; and the central chamber being dedicated to the cooling of the suction wall and the trailing edge and being provided with bridge elements each connecting the suction wall and the pressure wall.

The invention relates to a blade of a high-pressure turbine of a turboshaft engine, comprising: an airfoil extending in a spanwise direction, terminating in an apex and comprising a suction wall and a pressure wall joined by a leading edge and joined by a trailing edge, an internal cooling circuit having only an upstream duct and a central chamber for cooling this blade by circulating air; the upstream duct and the central chamber being separately supplied with air; the upstream duct being dedicated to the cooling of the leading edge and the pressure wall; and the central chamber being dedicated to the cooling of the suction wall and the trailing edge and being provided with bridge elements each connecting the suction wall and the pressure wall.

A rotating wing aircraft 1 comprises: at least one rotor blade 2; a primary gas-flow production means 7 for providing a flow of gas in an internal passage 13 of the at least one rotor blade 2; and a reserve gas-flow production means 11 for providing a flow of gas in the internal passage 13 of the at least one rotor blade 2.

A rotating wing aircraft 1 comprises: at least one rotor blade 2; a primary gas-flow production means 7 for providing a flow of gas in an internal passage 13 of the at least one rotor blade 2; and a reserve gas-flow production means 11 for providing a flow of gas in the internal passage 13 of the at least one rotor blade 2.

An unmanned aircraft system has a vertical takeoff and landing flight mode and a forward flight mode. The unmanned aircraft system includes an airframe, a rotor assembly rotatably coupled to the airframe and a propeller rotatably coupled to the airframe. The rotor assembly including at least two rotor blades having tip jets that are operably associated with a compressed gas power system. The propeller is operably associated with an electric power system. In the vertical takeoff and landing flight mode, compressed gas from the compressed gas power system is discharged through the tip jets to rotate the rotor assembly and generate vertical lift. In the forward flight mode, the electric power system drives the propeller to generate forward thrust and autorotation of the rotor assembly generates vertical lift.

An unmanned aircraft system has a vertical takeoff and landing flight mode and a forward flight mode. The unmanned aircraft system includes an airframe, a rotor assembly rotatably coupled to the airframe and a propeller rotatably coupled to the airframe. The rotor assembly including at least two rotor blades having tip jets that are operably associated with a compressed gas power system. The propeller is operably associated with an electric power system. In the vertical takeoff and landing flight mode, compressed gas from the compressed gas power system is discharged through the tip jets to rotate the rotor assembly and generate vertical lift. In the forward flight mode, the electric power system drives the propeller to generate forward thrust and autorotation of the rotor assembly generates vertical lift.

An oblique rotor-wing aircraft may be capable of vertical take-off and landing, subsonic cruise, transonic cruise, and/or supersonic cruise. The oblique rotor-wing aircraft may comprise one or more of a fuselage, a rotor-wing, a thrust-vectored propulsion system, a locking mechanism, and/or other components. The rotor-wing may be rotatably coupled to the fuselage. The rotor-wing may rotate about an axis in a first flight mode for vertical takeoff and landing. The oblique rotor-wing aircraft may include a thrust-vectored propulsion system that drives the rotation of the rotor-wing about the axis. The thrust-vectored propulsion system may include multiple, separately operable propulsion systems coupled to the rotor-wing and/or the fuselage. The oblique rotor-wing aircraft may comprise a locking mechanism that locks the rotor-wing at an angle oblique to the fuselage responsive to initiation of a second flight mode. The rotor-wing may be fixed at an angle oblique to the fuselage during the second flight mode.