At the inception of Unmanned Aerial Vehicle (UAV) in the 20th century, the UAVs were utilized specifically for military purposes. But with the passing time and advancements in various technologies, the UAVs now serve multiple purposes besides military application. The UAVs have witnessed a significant reduction in size and weight over the last decade, which has consequently reduced the cost of manufacturing. Besides these developments, the battery life has also been enhanced considerably along with the degree of autonomy for these vehicles. As a result of these developments, UAVs now have a wider range of applications in different commercial and non-commercial sectors. According to our recent market intelligence report ‘Global Unmanned Aerial Vehicle (UAV) Market Value and Volume: Analysis and Forecast (2017-2021)', the global UAV market accounted for a market value of $8.02 billion in 2016 with small UAVs holding the highest share.
The unmanned aerial vehicles (UAVs) have become a part and parcel of the military and commercial sector. It has also invaded the entertainment and recreational sector with the advent of nano drones. The advantages associated with the UAVs have surpassed any other available technology in the market, and thus, the development in the UAV technology has been witnessing a constant rise with the passing time. The UAVs have become more versatile for consumer and industrial market with the reductions in their power, components and form, which enable them to carry heavier payloads. The increasing applications of UAVs across military and commercial sector have necessitated the development of UAVs with increased fuel efficiency and flight endurance. Hence, the propulsion system is a key component of UAVs in achieving the mentioned features.