Performance of a Thrust-Vectoring Solution for Unmanned Air Vehicles

This paper focuses on the performance of a thrust-vectoring system tted to UAV/UCAV applications. It consists on the implementation of a cover-nozzle at the rear of the engine nozzle, which can rotate in the pitching and yawing planes. An experimental investigation is developed. A rst part of this investigation focuses on the consequences of the presence of the system on the engine behavior. Those consequences can prove drastic if the outlet cross-section of the cover-nozzle is not designed properly. A second part is dedicated to the performance of the system itself. The intensity of the lateral forces created are checked for dierent geometric conguration of the cover-nozzle. Some linearity is also expected between the deviation of the cover nozzle and the creation of lateral force, to ease the handling quality implementation on the nal aircraft. Those considerations are also analyzed as a function of the geometric parameters. The conclusions lead to some design recommendation for the cover nozzle geometry