Abstract: An electric motor nacelle for a vertical take-off and landing (VTOL) aircraft includes a fairing wherein an electric motor is housed equipped with at least one propeller extending outwards from a top face of the fairing, and a cooling device designed to cool the electric motor when the aircraft is in take-off, cruise and landing phases and including a reversible coolant fluid supply and exhaust manifold, designed, alternately: in the cruise phase, to receive a stream of cold fluid generated by the movement of the aircraft and to convey this stream of fluid, through the motor, towards an outlet situated opposite the propeller, and in take-off or landing phase, to receive a stream of hot fluid transmitted by the propeller and having passed through the motor.

Abstract: An electric motor nacelle for a vertical take-off and landing (VTOL) aircraft includes a fairing wherein an electric motor is housed equipped with at least one propeller extending outwards from a top face of the fairing, and a cooling device designed to cool the electric motor when the aircraft is in take-off, cruise and landing phases and including a reversible coolant fluid supply and exhaust manifold, designed, alternately: in the cruise phase, to receive a stream of cold fluid generated by the movement of the aircraft and to convey this stream of fluid, through the motor, towards an outlet situated opposite the propeller, and in take-off or landing phase, to receive a stream of hot fluid transmitted by the propeller and having passed through the motor.

Abstract: A cooling system for a drive device with several electric machines, the cooling system including a hydraulic circuit for a coolant including a cooling part in a gearbox of the drive device for cooling the gearbox, and an air/coolant heat exchanger including cooling walls forming channels for circulating coolant for the cooling thereof, an air cooling circuit including a plurality of fans, rotationally coupled to the gearbox, a cooling part between the cooling walls of the air/liquid heat exchanger, wherein the air sucked in and propelled by the fans circulates by sweeping over the cooling walls in order to cool them.

Abstract: The invention concerns a helicopter ventilation architecture, said helicopter comprising at least two avionics bays (112a, 112b) comprising electronic equipment (116a, 116b) to be ventilated, said architecture comprising, for each avionics bay, an air inlet (120a, 120b) allowing outside air to enter the avionics bay in order to ventilate said avionics bay, and an air outlet (124a, 124b), allowing the air ventilating the avionics bay to exit the avionics bay, characterised in that the ventilation architecture further comprises a mixing chamber (134), connected to the air outlets, configured to receive the air originating from all the avionics bays, at least one air duct (138a, 138b), connected to the mixing chamber and to an outlet (130a, 130b) for discharging the air to the outside, and at least two fans (128a, 128b), arranged and distributed in the air duct or ducts.

Abstract: The invention concerns a helicopter ventilation architecture, said helicopter comprising at least two avionics bays (112a, 112b) comprising electronic equipment (116a, 116b) to be ventilated, said architecture comprising, for each avionics bay, an air inlet (120a, 120b) allowing outside air to enter the avionics bay in order to ventilate said avionics bay, and an air outlet (124a, 124b), allowing the air ventilating the avionics bay to exit the avionics bay, characterised in that the ventilation architecture further comprises a mixing chamber (134), connected to the air outlets, configured to receive the air originating from all the avionics bays, at least one air duct (138a, 138b), connected to the mixing chamber and to an outlet (130a, 130b) for discharging the air to the outside, and at least two fans (128a, 128b), arranged and distributed in the air duct or ducts.