Abstract
This paper proposes a VTOL UAV for surveying over the hazardous aria after natural disasters. A fixed wing type UAV has an advantage to the long-distance flight, but it is required run way. Our idea of VTOL UAV is combined with trirotor type helicopter and fixed wing. Previous paper developed a hovering control system which is constructed with two single-rotors in the front, a one motor type coaxial rotor in the rear and a tilt servo motor in the rear to control the angle of coaxial mechanism. The problem of this mechanism was the tilt servo motor. In order to remove this mechanism, this paper is applied a trirotor layout UAV with four rotors with fixed wing. In order to show the advantage of this UAV, the hovering test and wind tunnel test are done.
