A ducted fan is a propulsion arrangement whereby a fan, which is a type of propeller, is mounted within a cylindrical shroud or duct. The duct reduces losses in thrust from the tip vortices of the fan, 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, airboats, hovercraft and fan packs.
Ducted fans normally have more and shorter blades than propellers and thus can operate at higher rotational speeds.
Read more about Ducted Fan: Applications, Advantages, Disadvantages
Famous quotes containing the word fan:
“A matchmaker after a wedding is like a fan after autumn.”
—Chinese proverb.
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