J-13 J-13 (J-15?) is the first generation of Chinese shipborne fighter aircraft being developed by both 601 Institute and SAC for PLAN's first aircraft carrier. It was speculated originally that the aircraft would be based on J-11B (as J-11BJ, see above). However recent evidence suggested that J-13 is very likely to be a new semi-stealth design. The twin-engine heavy fighter design might have benefited from a similar but more advanced stealth design developed between 1990 and 2000 by SAC/601 Institute to compete for the J-14 project (see below). It might also have benefited from the development of J-11B, such as similar radar and electronic systems as well as the improved WS-10A turbofan engine. Some key shipborne aircraft technologies such as landing/navigational systems are believed to be based on Russian Su-33 and were bought from Russia and Ukraine. Overall J-13 is believed to be in the same class of American F/A-18E. Some parts of J-13 such as landing gear have already been manufactured. The first prototype is projected to fly within 2-4 years.