X-Plane 9.70+ Boeing R&T Phantom Eye. The Boeing Phantom Eye is a high altitude, long endurance liquid hydrogen-powered unmanned aerial vehicle developed by Boeing Phantom Works. The aircraft is Boeing's proposal to meet the demand from the US military for unmanned drones designed to provide advanced intelligence and reconnaissance work, driven by the combat conditions in Afghanistan in particular. This is the proposed final design for the Phantom Eye. It is a scaled up version of the prototype that was first flown 4 June 2012. Full documentation is included in the download. By Billy Bargagliotti.