自从第一架能够飞到天空中去的喷气式飞机开始,到现在还只有十多年的历史。在这十多年之中,喷气式飞机的速度,从每小时一两百公里增加到一千公里左右;飞行持续时间从几分钟增加到三、四小时:进展非常迅速。喷气式飞机的原理顾名思义,喷气式飞机,是靠着向后面喷射气体的力量推动前进的。也许有人会奇怪,为什么向后面喷气,飞机却能够向前进行呢?其实,理由非常简单, Since the first jet aircraft that could fly into the sky, it has only been more than a decade old. During these more than a decade, the speed of jet aircraft has increased from one to two hundred kilometers per hour to about one thousand kilometers; the duration of flights has increased from several minutes to three or four hours: progress has been rapid. The principle of a jet aircraft As the name implies, a jet airplane is propelled by relying on the force of gas injected behind it. Some people may wonder why the jet can fly forward and the plane can move forward. In fact, the reason is very simple.