The autonomous Phantom Ray is a flying wing around the size of a conventional fighter jet, and first flew in April 2011.

It will conduct a program of test flights involving surveillance, ground attack and autonomous aerial refueling missions.

[5] Developed by the Boeing Phantom Works, the Phantom Ray is based on the X-45C prototype aircraft,[6] which Boeing originally developed for the Defense Advanced Research Projects Agency (DARPA), the US Air Force, and the US Navy Joint Unmanned Combat Air Systems (J-UCAS) program in 2002.

[10][11] The demonstrator aircraft was to perform ten test flights over six months, supporting missions such as intelligence, surveillance and reconnaissance; suppression of enemy air defenses; seek-and-destroy;[12] electronic attack; hunter/killer; and autonomous aerial refueling.

[13][15][16][17] The Phantom Ray flew to 7,500 feet and reached a speed of 178 knots,[18] flying for a total of 17 minutes.