Improved Propulsion Assembly For A Multi Engine Hybrid Aircraft

Abstract: The invention relates to a propulsion assembly (100) comprising a first and second engine (1, 2) each having a gas generator (12, 22) and a free turbine (11, 21), a main rotor (62) coupled to the free turbine (11, 21), the engines (1, 2) each comprising a first electric machine (30, 40) coupled to the gas generator (12, 22) only, a second electric machine (32, 42) coupled to the gas generator (12, 22) via a first coupling means (34, 44) when said machine rotates in a first direction, and coupled to the free turbine (11, 21) via a second coupling means (36, 46) when said machine rotates in a second direction, the first electric machine (30, 40) operating selectively in a motor or generator mode, the second electric machine (32, 42) operating in the motor mode when it rotates in the first direction, and selectively in the motor mode or the generator mode when it rotates in the second direction.

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