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家园 搜了一把,是这个么?

Boeing X-50

From Wikipedia, the free encyclopedia

The Boeing X-50A Dragonfly, formerly known as the Canard Rotor/Wing Demonstrator, is a gyrodyne unmanned aerial vehicle that was being developed by Boeing and DARPA to demonstrate the principle that a helicopter's rotor can be stopped in flight and act as a fixed wing. The X-50A builds upon the work of the Sikorsky X-Wing program of the 1980s by designing the vehicle as a multi-mode aircraft from the ground up. The X-50A is one of two projects funded by DARPA in its "Heliplane" program.[1]

1. ^ a b c d e McKenna, James T. "One Step Beyond", Rotor & Wing, February, 2007, page 54

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