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2. Ducted fan - Wikipedia

   en.wikipedia.org/wiki/Ducted_fan

   The most common ducted fan arrangement used in full-sized aircraft is a turbofan engine, where the power to turn the fan is provided by a gas turbine. High bypass ratio turbofan engines are used on nearly all civilian airliners , while military fighters usually make use of the better high-speed performance of a low bypass ratio turbofan with a ...

3. PJ-II Dreamer - Wikipedia

   en.wikipedia.org/wiki/PJ-II_Dreamer

   The Dreamer aircraft uses a special type of propulsion system called a dual ducted fan. This system gives it similar handling to a jet engine but is cheaper and less complicated to operate. Unlike propeller-driven planes, it doesn't have torque or P-factor issues, which are forces that can make the aircraft harder to control.

4. Pratt & Whitney XA101 - Wikipedia

   en.wikipedia.org/wiki/Pratt_&_Whitney_XA101

   The Pratt & Whitney XA101 is an American adaptive cycle engine demonstrator being developed by Pratt & Whitney for the Lockheed Martin F-35 Lightning II and form the technological foundation for the company's XA103 propulsion system for the United States Air Force's sixth generation fighter program, the Next Generation Air Dominance (NGAD).

5. Air Movement and Control Association - Wikipedia

   en.wikipedia.org/wiki/Air_Movement_and_Control...

   Part 4 of the Fan Application Manual, reviews the methods of making field measurements for calculating the actual performance of the fan and system. AMCA Publication 801 - Industrial Process/Power Generation Fans: Specification Guidelines provides information on testing and rating power plant fans and covers construction features and related ...

6. List of fictional aircraft - Wikipedia

   en.wikipedia.org/wiki/List_of_fictional_aircraft

   C-21 Dragon: a VTOL four-post ducted-fan transport and gunship, which appears in the film Avatar. [42] SA-2 Samson: a ducted-fan transverse rotor utility assault transport from the film Avatar. [43] XH9 Warbird: a VTOL ducted-fan twin-rotor utility aircraft that is used by the United States Air Force and the Atlas Corporation. It is equipped ...

7. Annular lift fan aircraft - Wikipedia

   en.wikipedia.org/wiki/Annular_lift_fan_aircraft

   The annular lift fan concept uses two parallel annular fans counter-rotating about the central fuselage.(see plan view) The two fans are incorporated in an annular duct, separated by a baffle, but coupled by the gears in the baffle to counter-rotate and eliminate torque. During VTOL, the outer fan is driven pneumatically or mechanically by the ...