按照美国从2005年开始全面采用的喷气式战斗机新划代标准,F-22和F-35均属第五代战斗机(简称五代机),第六代战斗机(简称六代机)则指两者之后的新一代战斗机。与战后的几十年一样,美国在六代机的发展方面再次走敏世界前面。但这一次的情况有了一些不同。在过去,美国可以在对手的同代战斗机还没有正式服役的情况下,就立项启动下一代战斗机的研制。比如,美国的侦察卫星发现米格--29和苏-27原型机之后,很快就立项启动了ATF项目,成就了今天号称可以统治天空几十年的F-22战斗机。但是时至今日,俄罗斯和中国的五代机在飞了,日本原来为五代机项目研制的“心 According to the new standard for the fighter jet of the United States that has been fully adopted since 2005, the F-22 and F-35 belong to the fifth generation fighter (referred to as the fifth generation aircraft) and the sixth generation fighter (referred to as the sixth generation aircraft) After a new generation of fighters. Like decades after the war, the United States has once again defended the world in the development of the sixth generation of machines. But this time there are some differences. In the past, the United States could launch the development of the next generation of fighter jets under the condition that its compatriots' contemporary generation fighters have not yet been officially served. For example, after the U.S. reconnaissance satellites discovered the MiG-29 and Su-27 prototypes, the ATF project was soon launched and the F-22 fighters claiming to rule the sky for decades are now being achieved. But up to now, the fifth generation of Russia and China are flying, and Japan originally developed the ”Heart of the Five Dynasties Project