steerable ducted propeller

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Blimp — For other uses, see Blimp (disambiguation). Not to be confused with Airship or Balloon (aircraft). The Spirit of Goodyear, one of the iconic Goodyear Blimps A blimp, or non rigid airship, is a floating airship without an internal supporting… … Wikipedia
Pump-jet — A pump jet or water jet is a marine system that creates a jet of water for propulsion. The mechanical arrangement may be a ducted propeller with nozzle, or a centrifugal pump and nozzle. The first functioning pump jet engine was created by New… … Wikipedia
Aircraft — An aircraft is a vehicle which is able to fly through the Earth s atmosphere or through any other atmosphere. Rocket vehicles are not aircraft if they are not supported by the surrounding air. All the human activity which surrounds aircraft is… … Wikipedia

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