Hummingbird line of VTOL unmanned aerial systems to make debut
Lafayette, Colo. (UPI) May 7, 2013 - Three Hummingbird vertical takeoff and landing unmanned aerial systems are being introduced by Reference Technologies, the company reports. The Model 1 Hummingbird is a battery powered aircraft with a medium flight duration and light payload capacity. Model II, a long flight duration and high payload aircraft, uses a gas-powered electrical system to power to six external rotors surround ... more
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