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The Korea Advanced Institute of Science and Technology (KAIST) has built and demonstrated a new unmanned aerial vehicle (UAV) that can fly for up to ten hours using 500 grams of liquefied hydrogen fuel. The hydrogen is the energy carrier which appears to provide electricity to an electric motor via a fuel cell. At this time, the plane is piloted from the ground using radio control, but the team says that they are close to implementing an automatic pilot system, meaning that the machine would not

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Sporting a 59 foot wingspan, the Qinetiq unmanned aerial vehicle is likely capable of setting a new world record for sustained unmanned flight. The previous record was set in 2001 by a jet-powered vehicle. The Qinetiq Zephyr, on the other hand, is powered by nothing but sunlight. The solar craft was able to stay airborne over the course of two nights using solar energy stored on-board during the day. The team in charge of the vehicle claims that it has stayed airborne for 54 hours, but this is n

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It appears as though military contractors aren't the only ones making headway on the development of unmanned aerial vehicles powered by fuel cells. In a collaboration between Georgia Tech's Aerospace Systems Design Laboratory (ADSL) and the Georgia Tech Research Institute (GTRI), researchers have created their own hydrogen-powered UAV.

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