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2. Ducted fan - Wikipedia

   en.wikipedia.org/wiki/Ducted_fan

   The high-bypass turbofan engines used on many modern airliners is an example of a very successful and popular use of ducted fan design. The duct increases thrust efficiency by up to 90% in most cases [citation needed], in comparison to a similar-sized propeller in free air. Ducted fans are quieter, and offer good opportunities for thrust vectoring.

3. Airbreathing jet engine - Wikipedia

   en.wikipedia.org/wiki/Airbreathing_jet_engine

   The fan stage accelerates a large volume of air through a duct, bypassing the engine core (the actual gas turbine component of the engine), and expelling it at the rear as a jet, creating thrust. A proportion of the air that comes through the fan stage enters the engine core rather than being ducted to the rear, and is thus compressed and ...

4. Category:Ducted fan-powered aircraft - Wikipedia

   en.wikipedia.org/wiki/Category:Ducted_fan...

   Aircraft whose primary form of thrust is derived from a piston engine, rotary engine or turboshaft driving a ducted fan. Subcategories This category has the following 2 subcategories, out of 2 total.

5. Components of jet engines - Wikipedia

   en.wikipedia.org/wiki/Components_of_jet_engines

   The air intake (inlet U.S. [6]) is an aerodynamic duct extending from an entry lip to the engine fan/compressor. For supersonic intakes with variable geometry it is called an intake system, referring to the need for shock-wave and internal duct flow management using variable position surfaces (ramps or cones) and bypass doors. [7]

6. Turbofan - Wikipedia

   en.wikipedia.org/wiki/Turbofan

   In a high-bypass design, the ducted fan and nozzle produce most of the thrust. Turbofans are closely related to turboprops in principle because both transfer some of the gas turbine's gas power, using extra machinery, to a bypass stream leaving less for the hot nozzle to convert to kinetic energy.

7. Fenestron - Wikipedia

   en.wikipedia.org/wiki/Fenestron

   A view of the EC120B's tailboom and Fenestron anti-torque tail fan. A Fenestron (sometimes alternatively referred to as a fantail or a "fan-in-fin" arrangement [1]) is an enclosed helicopter tail rotor that operates like a ducted fan.