ducted fan

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ducted fan

[¦dək·təd ′fan]
(mechanical engineering)
A propeller or multibladed fan inside a coaxial duct or cowling. Also known as ducted propeller; shrouded propeller.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Moreover, the VTOL UAVs have also been actively utilized for hobby and leisure and are classified into multirotor [1], coaxial [2], Coanda [3], and ducted-fan type [4].
This airplane is designed for High-Speed flying with a powerful Brushless Electric Ducted-Fan. The Fan Unit is very well constructed for High-Performance flying.
In the micro-UAS sector, UTRI makes the VTOL, ducted-fan Spyball and fixed-wing Crex-B systems.
Ducted-fan aircraft use a standard forward-thrust turbojet or turbofan engine that provides forward thrust while in forward flight.
Aurora offers the small 130-pound Goldeneye 80 ducted-fan UAV and the larger 620-pound Excalibur, which had its first flight at Aberdeen Proving Ground, Md., in June.
Additionally, the story stated that ducted-fan hovering UAVs had suffered a string of program failures, but did not clearly explain that the performance problems occurred when the vehicles were first developed a decade ago and have since been resolved.
Urban Aeronautics has started windtunnel testing of a 250kt (465km/h) capable cargo variant of its new 100kt top-speed Mule ducted-fan unmanned air vehicle.
The BAE Systems second-generation ducted-fan drone recently flew its maiden untethered flight, twice completing a course comprised of ten waypoints.
DARPA officials foresee that the ducted-fan MAV may complement conventional fixed-wing UAVs in the future.