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Naval Research Laboratory

Ion Tiger UAV

Caption: Fueled by liquid hydrogen, the Ion Tiger unmanned aerial vehicle (UAV) completes a record flight time of 48 hours and 1 minute. The electric fuel cell propulsion system onboard the Ion Tiger has the low noise and signature of a battery-powered UAV, while taking advantage of high-energy hydrogen fuel and the high electric efficiency of fuel cells.

Credit: U.S Naval Research Laboratory

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Related news release: NRL shatters endurance record for small electric UAV


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