AIRCRAFT INCLUDING AT LEAST ONE ENGINE HAVING COUNTER-ROTATING ROTORS

摘要

The aircraft (50) includes at least one engine (56) having counter-rotating rotors, the engine or at least one of the engines having imbalances associated with at least one ellipse (70). The aircraft includes a means capable of controlling the engine or at least one of the engines such that, at a given engine speed, the large axis (68) of the ellipse or at least one of the ellipses extends in a direction for which the vibrations generated by the engine or engines have a minimum intensity in at least one predetermined site, particularly in a predetermined area, of the aircraft.