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Liquid hydrogen and fuel cell powered UAV sets new endurance record

By Damir Beciri
12 May 2013

ion-tiger-flightResearchers at the U.S. Naval Research Laboratory (NRL) broke the endurance record for small electric Unmanned Aerial Vehicles (UAVs) by developing a vehicle powered by liquid hydrogen fuel and a fuel cell. This flight shatters their previous record of 26 hours and 2 minutes set in 2009 using the same vehicle, but with gaseous hydrogen… »


Spiral sound beacon for simpler navigation of underwater robots

By Damir Beciri
One Comment19 November 2010

spiral-beacon-underwater-navigationWith the increased use of underwater robotics, underwater navigation becomes more and more important. A research team from Naval Research Laboratory, the University of Washington, and Naval Surface Warfare Center has developed and tested an underwater navigation system that uses a spiral shaped acoustic wave to determine aspect. The single stationary beacon can provide a… »