飞到最高测试飞机的最大升限,是现代任何一种飞机服役前必须进行的各项测试之一。但是在1951年8月15日,道格拉斯的一架D-558-Ⅱ代号“天空火箭”的飞机可不是为了例行公事,一架B-29“超级空中堡垒”携带这架飞机在空中释放,机上飞行员威雷姆·布雷德曼(William Bridgeman)驾驶飞机达到了一个超越所有前人的高度,当时飞机的升限达到了惊人的24080米。后来布雷德曼在自己的回忆录里专门记述了这件事,回忆录的名字叫 One of the tests that must be carried out on any aircraft of any modern type before it can fly to the maximum ceiling of the highest test aircraft. However, on August 15, 1951, a Douglas D-558-II aircraft named “Sky Rocket” was not for routine use. A B-29 “Super Sky Fort” carried the aircraft in the air Released, pilots on board pilot William Bridgeman reached a level above all his predecessors in piloting the aircraft, reaching an astonishing 24080 meters. Later, Bradman specifically wrote about it in his memoir, whose name was