As for a general method of making to VTOL of the tandem wing aircraft, four rotors are set up in the Wingtip. In the present study, two rotors for the Bi-Copter are set up between front wing and rear wing. To apply to UAV, flight control surfaces are simplified. We propose the flight control method without installing control surface in the fixed wing by each rotor thrust vectoring and weight transfer. The flying characteristic can be make variable by the weight transfer.