Wind Tunnel Testing of a Novel Quadrotor Design

This study presents the test development and aerodynamic evaluation of the Quadfoil UAV, a novel quadrotor configuration featuring a central lifting body in the form of an airfoil to enhance forward-flight efficiency. Flight tests conducted by Virginia Tech demonstrated a 25% increase in endurance and a 32% improvement in range compared to conventional quadcopters, validating the aerodynamic benefits of this design. To further investigate its performance, a dynamically adjustable angle of attack model support system was developed for wind tunnel testing, enabling precise replication of in-flight conditions. The support system, controlled via LabVIEW, adjusts angle of attack based on real-time tilt sensor feedback, facilitating force and moment testing across various speeds. Wind tunnel experiments included the identification of trim conditions as well as pitch sweeps without propellers, flow visualization, and power consumption measurements. The results not only validate the Quadfoil’s enhanced aerodynamic efficiency but also provide critical performance data, and power requirements, essential for refining flight control laws. These findings further establish the Quadfoil as a suitable solution for energy-efficient, long-range missions.