This paper explains and details about a brief study and comparison of the various available engineering and structural materials which is the key requirement for the optimum functioning of Unmanned Aerial Vehicles (UAVs) known as drone and referred to as Remotely Piloted Aircraft (RPA) of 'Advanced class' of this competition. The major requirements that these materials on UAVs with respect to physical and mechanical properties must fulfill are: resistance to buckling, high ultimate tensile strength, less inflammable, high strength to weight ratio, low thermal gradient, resistance to noise and vibration, resistance against deteriorative fuels and chemicals, low corrosion and oxidation, ease of shape ability, fastening and joining, high fatigue and endurance limit