J-20 Uses Homegrown WS-15, More Powerful, Reliable than Russian AL-31FPosted: September 19, 2016
The above photo of series produced J-20 proves that it uses China’s WS-15 engines as there are no grooves on the nozzles of its engines.
According to the photo below, WS-15 is much more powerful than AL-31F. The AL-31F’s nozzle has shrunk so that the speed of smoke is much higher than that of the WS-15 with nozzle not shrunk while they produce similar thrust for the J-20.
The article reveals that the temperature before turbine is 1,474 degree Celsius in WS-15, the highest in the world. No wonder WS-15 is much more powerful than AL-31F. Its reliability lies between Western and Russian ones with a life of 900 hours longer than AL-31F.
Since the engine problem has been solved, J-20 can be regarded as a capable modern stealth fighter as it has satisfactory electronics and stealth shape.
Source: mil.news.sina.com.cn “Depth Column: It is certain that homegrown WS-15 engines are installed on J-20: Reliability surpasses Russian engine?” (summary by Chan Kai Yee based on the report in Chinese)