New class of UAVs look more like UFOs

http://www.gizmag.com/aesir-unmanned-aerial-vehicle/12813/

14/09/09

Most Unmanned Aerial Vehicles (UAVs) employ a fixed wing design like that of a traditional plane. But these designs offer limited maneuverability and payload capacity, require a runway to takeoff and land, and are unable to hover. Vertical Take Off and Landing (VTOL) UAVs get around these problems, usually by employing rotors like a helicopter. Now UK-based company AESIR has developed a VTOL UAV that has no external rotating parts, instead relying on a phenomenon known as the Coanda effect to generate lift.