Multifunctional propulsive system for an airplane

A propulsive system for an airplane that has a jet engine and a nacelle surrounding said jet engine, with said nacelle having a front section between an air inlet in the front in the direction of motion of the flight and a rear extremity of the front section at the rear, with said nacelle having a rear section behind the rear extremity forming an extension of the front section of the nacelle, said rear section being formed by two petals hinged relative to the front section, with interior and exterior surfaces of said petals in a zero setting position each being in geometric continuity with the interior and exterior surfaces determining the aerodynamic forms of the front section wherein the petals are each hinged around an axis essentially in a plane perpendicular to a longitudinal axis of the propulsive system and of the jet engine, and are located behind the rear extremity of the front section of the nacelle so that the position of the said axis relative to each petal determines an anterior section of the petal, located in front of the axis of rotation, and determines a posterior section of the petal, located behind the axis of rotation of the petal.