Wing–propeller interference

Purpose The purpose of this study is to investigate the impact of wing–propeller interference on the lift coefficient and aerodynamic efficiency of delta wings, addressing a critical gap in the existing literature. The research provides new data that can be used in the preliminary design of next-generation unmanned aerial vehicles (UAVs). Design/methodology/approach Forces acting on the aircraft were measured in the wind tunnel using self-developed measurement scales. The impact of wing–propeller interference on performance in takeoff conditions was thus measured. Findings The results reveal that a 30% increase in lift coefficient is possible for delta-winged aircraft driven by multiple propellers for typical takeoff conditions of V = 8 m/s, AoA between 20° and 30° and elevon deflection between −15° and −25°. These findings offer significant implications for UAV designs, indicating that they can be developed with a higher payload, more fuel, or a smaller launcher in mind. Originality/value This research offers a novel perspective on delta-winged UAVs, providing data that enhances their attractiveness as a design choice. The study’s findings fill the gap in research on interference between multiple large propellers and short-wingspan, high-swept wings, highlighting areas for future research and potential practical applications.