PURPOSE: To jointly provide the convenience of dispensing with a runway and the function of flying at high altitude by transmitting the revolution of the engine to a rotor by a shaft, and changing the direction of the rotor to a rear part of a main wind after the vertical climb to obtain the forward propulsion.

CONSTITUTION: An engine 2 is provided on a fuselage 1, and rotors 5, 6 are provided on the lower part of a left main wing 3 and a right main wing 4. The revolution of the engine 2 is transmitted to the rotors 5, 6 by a shaft 7, and the direction of the rotors 5, 6 is changed toward the rear part of main wings 3, 4 after the vertical climb to obtain the forward propulsion. In the landing, stabilizers 8, 9 are erected to prevent a body from being inclined. A belt 13 is stretched between a body 11 and a pulley 12 to transmit the revolution of the engine 2 to a shaft 10. The revolution is transmitted from a bevel gear 16 of the shaft 10 to a bevel gear 17 of a shaft 18 of the rotor to rotate the rotor 5. The direction of a case 20 is changed by an arm to move the rotor 5 toward the rear part of the main wings 3, 4 for the longitudinal rotation.