The Aurora Excalibur was an unmanned aerial vehicle (UAV) developed by Aurora Flight Sciences between 2005 and 2010 capable of vertical takeoff and landing (VTOL).[1] The design combined ducted fans and hybrid drive. A smaller scale model with a 13feet wingspan was successfully tested on June 24, 2009.[2] A full-scale version was to be capable of carrying four AGM-114 Hellfire missiles and traveling at 460mph.[2] Aurora used the experience of developing this vehicle to inform their submission to the Vertical Take-Off and Landing Experimental Aircraft (VTOL X-Plane) programme funded by the Defense Advanced Research Projects Agency (DARPA).[1]