Abstract: In order to evaluate the wind resistance of quadrotor fixed wing vertical take off and landing (VTOL) hybrid unmanned aerial vehicle (QFHAV) during the VTOL process, this paper proposes a method to analyze the wind resistance based on the QFHAV’s maintaining stability in windy conditions. Taking a twin boom QFHAV (TB-QFHAV) product as an example, this paper analyzes the wind resistance of the TB-QFHAV and the influencing factors using the proposed method. The analysis results indicate that the TB-QFHAV has strong wind resistance under the head wind situation and it has poor wind resistance under the crosswind situation. The wind resistance under the crosswind situation can be improved by increasing the angle of propeller disc of the quadrotor, extending the distance between the installation position of the quadrotor propeller disc and the center of gravity and optimizing the vertical tail. The flight test verifies the feasibility of the proposed method and the correctness of the analysis results.

Key words: quadrotor fixed wing vertical take off and landing hybrid unmanned aerial vehicle (QFHAV), wind resistance, influencing factors, improve wind resistance