page_title: Ducted fan
hierarchical_section_title: Ducted fan
context_page_description: A ducted fan is an air moving arrangement whereby a mechanical fan, which is a type of propeller, is mounted within a cylindrical shroud or duct. The duct reduces losses in thrust from the tips of the propeller blades, and varying the cross-section of the duct allows the designer to advantageously affect the velocity and pressure of the airflow according to Bernoulli's principle. Ducted fan propulsion is used in aircraft, airships, hovercraft, and fan packs.
  A jet fan is a stationary ducted fan used to move air through buildings or tunnels.
  Ducted fans normally have more and shorter blades than conventional propellers and thus can operate at higher rotational speeds.
context_section_description: A ducted fan is an air moving arrangement whereby a mechanical fan, which is a type of propeller, is mounted within a cylindrical shroud or duct. The duct reduces losses in thrust from the tips of the propeller blades, and varying the cross-section of the duct allows the designer to advantageously affect the velocity and pressure of the airflow according to Bernoulli's principle. Ducted fan propulsion is used in aircraft, airships, hovercraft, and fan packs.
  A jet fan is a stationary ducted fan used to move air through buildings or tunnels.
  Ducted fans normally have more and shorter blades than conventional propellers and thus can operate at higher rotational speeds.
caption: Bell X-22
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