在军用喷气式教练机诞生以来的半个多世纪里,人们对它的需求在观念上已经发生了渐进式的转变。最初的喷气教练机是以早期的喷气战斗机为基础改进的,在性能及操纵方式上并没有很大的差别。从五个年代起的数十年时间中,这些教练机保证了飞行员初级和高级的训练。后来出现了一些专用教练机,如L-39、“阿尔发喷气”、“鹰”等。但在培训当前及下一代战斗机的驾驶员时,这些教练机却多少有些力不从心。 In the more than half a century since the birth of the military jet trainer, the demand for it has undergone a gradual change in concept. The original jet trainer was based on an earlier jet fighter and was not significantly different in performance and handling. For decades from five decades onwards, these trainers have guaranteed pilots' first and advanced training. Later there were some specialized trainers, such as the L-39, “Alpha Jet,” “Eagle,” and so on. However, when training pilots of current and next-generation fighter jets, these trainers are somewhat less powerful.