在波音公司的飞机厂里停放着一架机身呈海豚状,具有直升机和固定翼飞机双重特点的研究机,它就是今年夏天将要试飞的 X-50A“蜻蜒”(Dragonfly)验证机。制造这架飞机的主要目的是研制第一架在飞行中就能够完成转子启动与关闭的旋转翼飞机。如果这架鸭式旋转翼飞机能够验证成功,就将叩开研制新型高速垂直起降飞机的大门。 At the Boeing aircraft factory is parked a dolphin-shaped, helicopter and fixed-wing aircraft of the dual characteristics of the research machine, it is to be on test this summer, the X-50A “Dragonfly” (Dragonfly) verification machine. The main purpose of making this aircraft is to develop the first rotary-wing aircraft that will be able to complete the start-up and shut-down of the rotor in flight. If this duck-wing rotary wing aircraft can be successfully verified, it will open the door to develop new high-speed vertical takeoff and landing aircraft.