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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. 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.

  4. Bell X-22 - Wikipedia

    en.wikipedia.org/wiki/Bell_X-22

    The Bell X-22 is an American V/STOL X-plane with four tilting ducted fans.Takeoff was to selectively occur either with the propellers tilted vertically upwards, or on a short runway with the nacelles tilted forward at approximately 45°.

  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. Axial fan design - Wikipedia

    en.wikipedia.org/wiki/Axial_fan_design

    An axial fan is a type of fan that causes gas to flow through it in an axial direction, parallel to the shaft about which the blades rotate. The flow is axial at entry and exit. The fan is designed to produce a pressure difference, and hence force, to cause a flow through the fan. Factors which determine the performance of the fan include the ...

  7. Ryan XV-5 Vertifan - Wikipedia

    en.wikipedia.org/wiki/Ryan_XV-5_Vertifan

    The J85 and lift-fan combination was a precursor to developments which led to the first GE high BPR engine, the TF-39. [4] The lift fans were driven by turbine blades mounted around the periphery of the fan, with mass flow 13 times greater than the gas generators mass flow and increased thrust 3 times over that available using a propelling nozzle.

  8. Ducted propeller - Wikipedia

    en.wikipedia.org/wiki/Ducted_propeller

    A ducted propeller, also known as a Kort nozzle, is a marine propeller fitted with a non-rotating nozzle. It is used to improve the efficiency of the propeller and is especially used on heavily loaded propellers or propellers with limited diameter.

  9. List of VTOL aircraft - Wikipedia

    en.wikipedia.org/wiki/List_of_VTOL_aircraft

    Hawker-Siddeley HS.138 (ducted fans) [2] Hawker-Siddeley HS.145; Hawker Siddeley P.1017 (cancelled supersonic vectored thrust) Hawker Siddeley P.1154 (cancelled supersonic vectored thrust) Hawker Siddeley P.1184-16 Dash 18; Hawker Siddeley P.1217; Heinkel Lerche (coleopter; not built) Hiller VZ-1 Pawnee (ducted fan) Hiller X-18

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