Hydrogen Powered Drones examines hydrogen as an energy carrier during generation and storage, and use as a drone fuel, laying the groundwork for the design and safe operation of liquid fuel powered drones. The book educates readers on fundamental properties of hydrogen and its safety issues when used as aviation fuel. It presents a holistic, physics-based approach to understanding how UAVs operate, focusing on the use of high energy density liquid fuels and methods to improve the drone energy efficiency. Unmanned Aerial Vehicles (UAVs) or drones are a new and important technology whose deployment is rapidly expanding. One of their challenges is efficient energy storage. In the context of energy sustainability and transportation electrification,