The ScanEagle mini-UAV (unmanned aerial vehicle), in use by the U.S. Navy, has logged its first flight powered by a hydrogen fuel cell. The UAV, developed by Boeing subsidiary Insitu Inc. of Bingen, Wash., flew 2.5 hr. with the propulsion module. The flight test is significant since the U.S. Defense Department expects fuel cells to play an increasingly important role in improving the mission capability of UAVs and other platforms. One benefit of fuel cells for UAVs such as ScanEagle is ...


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