A light cargo unmanned air vehicle (UAV) was designed, constructed, and tested in flight. This UAV was designed and build according to the specifications of the Air Cargo Challenge 2009 Design, Build & Fly European student competition. The basic aerodynamic and stability analysis that was used in the preliminary phase of the light UAV design are presented. Flight stability analysis was based on the linearized theory. The preliminary aerodynamic analysis was based on Navier-Stokes solutions for wing and wingbody configurations. The conceptual design was constructed and successfully tested. Further aerodynamic analysis for the full configuration was carried out to evaluate the performance during the flight envelope. The findings of this analysis could be utilized to further improve the aerodynamics of the existing design, and enhance stability and performance characteristics of the light cargo UAV.

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