The WZ-9 Sky Wing UAV,built by Guizhouz Aviation Industry Corporation, has been fitted with a pair of stealthy and more powerful engines. The Sky Wing was first seen in 2003, when it flew with a WS-11 turbofan, which has a thrust of 1.7 tons. It has some stealth festures, such as a V-shaped pelican tail and backwards swept wings. In its original configuration, it could carry about 80 kilograms of sensors such as electro-optical cameras and radars, on a 1.7 ton airframe. Compared to other Chinese high altitude reconnaissance drones like the BZK-005, the Sky Wing did not enter into widespread service. However, Chengdu Aircraft Corporation has undertaken further testing of the drone.