. "Shenyang BA-5"@en . "Development of the BA-5 began in the 1960s. It was designed by General Zhao Xu, also known as the father of \"Chinese UAVs\". It is powered by the WP-6 engine, which was copied from the Russian Mikulin RD-9B engine, with some changes on the systems, the reason for that was that at this time the engineers had problems with building a suitable ramjet. Because the engine had to much thrust, the take-off controls were optimized for the BA-5. The Wopen-6 was primarly developed for the Shenyang J-6 (a Chinese MiG-19 Farmer). Until the rocket launching system was available, the BA-5 needed take-off assistence."@en . . . . . "Development of the BA-5 began in the 1960s. It was designed by General Zhao Xu, also known as the father of \"Chinese UAVs\". It is powered by the WP-6 engine, which was copied from the Russian Mikulin RD-9B engine, with some changes on the systems, the reason for that was that at this time the engineers had problems with building a suitable ramjet. Because the engine had to much thrust, the take-off controls were optimized for the BA-5. The Wopen-6 was primarly developed for the Shenyang J-6 (a Chinese MiG-19 Farmer). Until the rocket launching system was available, the BA-5 needed take-off assistence. At the time it entered service with the People\u00B4s Liberation Army Air Force, it was no longer needed to act as a target drone, so a derivative of it, the CK-1A was used for reconnaissance roles and as a nuclear radiation sampling variant. Another derivative the CK-1B was introduced in 1983 designed for low-level flight. It\u00B4s successor was the CK-1C with enhanced maneuverability and reinforcement to withstand maneuvering stresses, the UAV is able to do that due to highly improved control systems."@en .