The flight time of the Stalker UAS has been improved by 2,400 percent using a wireless laser beam power system (Photo: Lockheed Martin)
The Power Link system can recharge a UAV without it needing to land (Image: LaserMotive)
Late last year, DARPA researchers upped the standard two-hour endurance of Lockheed Martin’s Stalker small unmanned aerial system (UAS) by a factor of four using a propane-fueled compact solid oxide fuel cell (SOFC). Now the flight time of the aircraft has been improved by a whopping 2,400 percent, with a test flight lasting more than 48 hours using a laser power system to wirelessly transfer power to the UAS from the ground.
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