 Lift-fan (Sheng-Li Feng-Shan, 升力风扇) is an experimental UAV developed by NWPU to explore technologies applicable to vertical take-off in lift-fan design.As with most lift-fan type UAV, this UAV is also in cylindrical shape with ducted fan as part of its fuselage, and payload can be installed either above or below the propulsion system.Nimble Dragon (Ling-Long or Linglong, 灵龙) UAV is a VTOL experimental UAV developed by NWPU that is a combination of rotary and fixed wing aircraft with tricycle landing gear.