The Black Eagle 50 Rotary UAV Flight. The Black Eagle 50 Rotary UAV (RUAV) is an unmanned rotorcraft, which takes off, hovers, flies and lands without the need of a pilot. The Black Eagle 50 is part of an Unmanned Aerial System (UAS) which includes a Ground Control System with a 6 hour battery, a communication data link, an onboard camera (payload) and the option of a manned all terrain vehicle or a mini-van.