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19th December 2008, 18:58
This week, Boeing announced that its A160T Turbine Hummingbird, an unmanned rotorcraft, reached the technological goal of shifting gears in flight. “Being able to shift gears in flight is the final...
Read more... (http://www.aviationtoday.com/rw/military/observation/28505.html)
Read more... (http://www.aviationtoday.com/rw/military/observation/28505.html)