The Shenyang WS-20 is a high-bypass turbofan aircraft engine designed by the Shenyang Aeroengine Research Institute for the PLAAF's Y-20 family of strategic airlifters, it is currently installed in limited numbers. It is based on the core of the low-bypass turbofan Shenyang WS-10A. The thrust range is 138 kilonewtons (31,000 lbf).