PURPOSE: To obtain an aircraft possible in hovering and horizontal flight by providing a pair of coaxial rotors rotating in reverse directions with each other in a disklike housing arranging an engine and a cabin at the center, and many adjustable air guiding means in the air flow of the rotors.

CONSTITUTION: This aircraft has a flat and circular housing 1 having a pair of coaxial rotors 2 and 3 tuning in reverse directions at an equivalent speed, and the housing 1 has a wing portion, for generating aerodynamic lift during flight in a horizontal direction, in the expanded portion in the longitudinal direction of the housing 1. An engine 8 and a cabin 9 for crew are arranged at the center portion of the gravity of the aircraft, and the rotors 2 and 3 are rotated by the engine 8. The respective rotors 2 and 3 are equipped with three vanes fitted to a drive ring 12 at an angle of 120°, and an air flow generated by the rotation of the rotors 2 and 3 is blown off downward via an adjustable air guiding means 16 provided on an air outlet divided into many sectors.