Hybrid type rotorcraft having a horizontal stabilizer and two fins arranged on the horizontal stabilizer

A hybrid type rotorcraft comprising:

• a main rotor providing at least all or part of lift of the rotorcraft;
• at least two propulsion elements providing all or part of propulsion of the rotorcraft, the two propulsion elements each being mounted on a respective half-wing, the half-wings being arranged symmetrically on either side of an anteroposterior midplane XOZ of symmetry of all or part of the rotorcraft, the anteroposterior midplane XOZ extending between a front zone and a rear zone of the rotorcraft in a longitudinal direction X and between a bottom zone and a top zone of the rotorcraft in a direction in elevation Z;
• a horizontal stabilizer arranged in the rear zone of the rotorcraft on either side of the anteroposterior midplane XOZ;
• and
• two fins arranged on respective sides of the anteroposterior midplane XOZ, the two fins consisting in a left fin positioned at a left distal zone of the horizontal stabilizer and a right fin positioned at a right distal zone of the horizontal stabilizer, each of the left/right fins respectively comprising a left/right bottom fin airfoil arranged below the horizontal stabilizer and a left/right top fin airfoil arranged above the horizontal stabilizer, the left bottom/top fin airfoils and the right bottom/top fin airfoils being rigidly secured to the horizontal stabilizer;
• wherein the left bottom fin airfoil approaches the left top fin airfoil from their respective junctions with the horizontal stabilizer and the right bottom fin airfoil approaches the right top fin airfoil from their respective junctions with the horizontal stabilizer, the left bottom/top fin airfoils extending in full or in part, at least in their free ends, away from the anteroposterior midplane XOZ, and the right bottom/top fin airfoils extending in full or in part, at least at their free ends, away from the anteroposterior midplane XOZ.