The aim of this paper is to present a UAV's configuration that combines the manoeuvrability of a rotary wing vehicle (helicopter) such as slow forward displacement, vertical take off and landing, and the performance of a fixed wing vehicle (plane) such as fast forward movement, long reach and superior endurance.

Abstract-A helicopter offers the capability of hover, slow forward displacement, vertical take-off and landing while a conventional airplane has the performance of fast forward movement, long reach and superior endurance. The aim of this paper is to present the modelling and control of a tilt trirotor UAV's configuration that combines the advantages of both rotary wing and fixed wing vehicle.