当飞机垂直起飞时，飞马发动机前后四个喷管转到垂直向下的位置，在喷气反作用力的作用下产生向上的推力，使飞机垂直上升；
When the plane tries to take off vertically, the Pegasus engine's four jettube will turned to face the ground so that the whiff will raise the aircraft.
当飞机垂直起飞时，飞马发动机前后四个喷管转到垂直向下的位置，在喷气反作用力的作用下产生向上的推力，使飞机垂直上升；
When the plane tries to take off vertically, the Pegasus engine's four jettube will turned to face the ground so that the whiff will raise the aircraft.
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