据推测，这一重点型号极有可能是歼 - 20 标配发动机涡扇 15，这意味着涡扇 15 的综合性能超越了美国引以为傲的 F119 发动机。涡扇 - 15 性能领先 F ...

The U.S. Air Force (USAF) awarded defense contractor Lockheed Martin a $270 million contract to upgrade the infrared sensors ...

Lockheed Martin receives a lot of credit for making the plane what it is ... and Pratt & Whitney manufactured its twin F119-PW-100 turbofan engines with afterburners and two-dimensional thrust ...