 Propulsion is provided by three engines, with the larger main engine mounted in the fuselage, mainly to provide lift.There are two smaller propeller mounted at the each side of the fuselage at empennage, and these smaller engines are mainly used to provide propulsion during level flight.Goblin (Jing-Ling or Jingling, 精灵) UAV is a V/STOL micro air vehicle (MAV) developed by NUAA.