During the flight, many models UAV have been destroyed. Especially, many UAV were destroyed on the surface of the wing. This paper, based on aerodynamic elastic principles, presents causes of the destroyed phenomenon of UAVs profile. Also, the paper presents the results obtained when conducting durable fiber composite UAV model in which the wings are reinforced by hard steel of average carbon intensity (carbon 0:25 - 0.6 percent) in changing weather conditions with 2 level, 3 level, 4 level and 6 level windy. The calculation results are simulated in Ansys CPX.