China J31 stealth fighter (a knockoff of the US F35), has to overcome engine and sensor issues
The J-31 fighter jet had poor performance in air demonstrations at the 2014 Airshow China in Zhuhai. This has prompted officials from the state-run Aviation Industry Corporation of China (AVIC) to emphasise the future development path for the aircraft. The builder AVIC is attempting to convey the perception that the actual “FC-31” production-standard aircraft will …