The creation of a prototype vertical takeoff and landing fixed wing unmanned aerial system for use in sampling of trace gases, aerosols, and volatile organic compounds is described. A conceptual design framework is devised based upon desired performance characteristics and conclusions drawn from background research into platform layout, energy sources, and construction methods. Optimized designs are produced according to this framework, and the most appropriate option for the application serves as the foundation in producing a detailed design of the platform. The methods employed in manufacturing the aircraft’s individual components as well as the assembly of the system as a whole are described. The testing involved in validating critical systems is presented, culminating in an accounts of the aircraft’s flight tests. The lessons learned from this first implementation are highlighted and then applied to produce an improved conceptual design.