Rotary wing rotorcraft having a plurality of propellers

A hybrid aircraft having:

• a fuselage extending longitudinally along an anteroposterior plane of symmetry (PSYM) from the rear of the aircraft towards the front of the aircraft;
• a rotary wing carried by the fuselage;
• a lift surface fastened to the fuselage and constituted by a first half-wing and a second half-wing situated on either side of the fuselage;
• and
• a first propulsion unit carried by the first half-wing and a second propulsion unit carried by the second half-wing, wherein each respective propulsion unit is disposed about a respective axis of rotation (AX) that is offset transversely from the anteroposterior plane of symmetry (PSYM), the first propulsion unit including both a first propeller and a second propeller on a first one of the respective axes arranged back to back and suitable in a normal thrust mode of operation respectively for generating thrust towards the front of the aircraft and thrust directed towards the rear of the aircraft, this first propulsion unit always presenting one propeller that generates no thrust during hovering flight, wherein the first propeller of the first propulsion unit generates no thrust during hovering flight, and the second propeller of the first propulsion unit operates in the reverse thrust mode of operation in forward flight.