CJ-6 Dives Deep & Rolls Over! Introduced in 1960 the Nanchang CJ-6 is a two seat primary trainer aircraft, powered by a 260-hp Zhuzhou Huosai HS-6 radial piston engine. A common, but mistaken, belief is that the CJ-6 is a Chinese version of the Yakovlev Yak-18A. The CJ-6A, an improved 285 horse version, is a popular hobby plane. A CJ-6 can cost as little as $75,000 in the US resale market. The aircraft appears on the civil register of the USA, Australia, UK, South Africa and other countries.