Battery capacity severely limits the performance of multirotor small unmanned aircraft systems (UAS), which dominate the commercial drone market because of their ease of deployment and use. A new generation of drones is now becoming available, with hybrid gasoline-electric propulsion providing significantly increased payload and endurance. Virginia-based startup Advanced Aircraft Co. (AAC) plans to begin deliveries of its Hercules long-endurance multirotor small UAS in December. A hybrid ...

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