Reference Technologies has designed the Hummingbird UAS (unmanned aerial system), which uses both multi-rotors and ducted fans for VTOL capabilities and maneuvering. The Hummingbird boasts f... Read more
Reference Technologies has designed the Hummingbird UAS (unmanned aerial system), which uses both multi-rotors and ducted fans for VTOL capabilities and maneuvering. The Hummingbird boasts f... Read more
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