1992年,美国国防部加紧其高空长航时无人驾驶飞机的研制工作。其下属的弹道导弹防御机构制定了一项“战区战斗系统快速反应飞机计划”。 该飞机与普通的单螺旋浆大翼展飞机相似。装上新型高空发动机可飞到65000英尺高度,续航时间达到50小时。它装有用来发现导弹发射的传感器,并配备用于摧毁来袭弹道导弹弹头的称为“魔爪”的机动火箭。“魔爪”火箭重50英磅,使用液体燃料,在飞行中可改变推力和速度,能以每秒2～3公里的速度飞行,去打击远在60英里的目标。 这是一种自备式防导弹系统,用来防象“飞毛腿”那样的导弹。研制费 In 1992, the U.S. Department of Defense stepped up research and development of its drones at high altitude. Its subordinate ballistic missile defense agency has devised a “battlefield rapid response aircraft program”. The aircraft is similar to an ordinary single-propeller large-wing aircraft. Fitted with a new high-altitude engine can fly to 65,000 feet, life time of 50 hours. It is equipped with sensors to detect the launch of missiles and is equipped with a “rocket” rocket to destroy incoming warhead missile warheads. “Talon claw” rockets 50 pounds, using liquid fuel, can change the thrust and speed in flight, can fly 2 to 3 kilometers per second, to combat the goal of 60 miles away. This is a self-contained missile defense system that prevents missiles like “Scuds.” Development costs