Soaring of the future is here - a completely autonomous RC glider has flown a 113.4 km (70.47 mi) open distance. It has also unofficially broken the cross-country soaring out-and-return world record by flying 97.2 km (60.4 mi) declared distance over approximately 4.55 hr.

All the details are in the paper from the US Naval Research Lab that you may read he

http://www.dtic.mil/get-tr-doc/pdf?AD=ADA614555