Chinese engine production hindered by supply chain problems.

China has completed the development of its next generation of indigenous military aircraft engines, including the WS-19 and WS-20 turbofans, but mass production is being held up by supply chain issues with advanced alloys. The WS-19 is being developed to power the Shenyang J-35 fighter jet, while the WS-20 will power the Xi’an Y-20 airlifters. The WS-15 afterburning turbofan is ready for mass production and will be used for later variants of the Chengdu J-20 stealth fighters. China has achieved “98% localization” for the WS-10C engine, which powers the J-20s currently being delivered to the People’s Liberation Army Air Force.