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An aft-fan configuration was later used for the General Electric GE36 UDF (propfan) demonstrator of the early 1980s. In 1971 a concept was put forward by the NASA Lewis Research Center for a supersonic transport engine which operated as an aft-fan turbofan at take-off and subsonic speeds and a turbojet at higher speeds.
In aeronautics, a ducted fan is a thrust-generating mechanical fan or propeller mounted within a cylindrical duct or shroud. Other terms include ducted propeller or shrouded propeller . [ 1 ] When used in vertical takeoff and landing ( VTOL ) applications it is also known as a shrouded rotor .
Lift fan is an aircraft configuration in which lifting fans are located in large holes in an otherwise conventional fixed wing [1] or fuselage. It is used for V/STOL operation. The aircraft takes off using the fans to provide lift, then transitions to fixed-wing lift in forward flight.
the rear of the F135 engine (nozzle rotated down) that powers the Rolls-Royce LiftSystem. Instead of using separate lift engines, like the Yakovlev Yak-38, or rotating nozzles for engine bypass air, like the Harrier, the "LiftSystem" has a shaft-driven LiftFan, designed by Lockheed Martin and developed by Rolls-Royce, [3] and a thrust vectoring nozzle for the engine exhaust that provides lift ...
The deployment of FANS-1 was originally justified by improving route choice and thereby reducing fuel burn. The datalink control and display unit (DCDU) on an Airbus A330, the pilot interface for sending and receiving CPDLC messages. A similar product (FANS-A) was later developed by Airbus for the A340 and A330.
The Compaq Evo is a series of business PCs (desktop and laptop) and thin clients made by Compaq and then Hewlett-Packard following the 2002 merger. The Evo brand was introduced by Compaq in May 2001 as a business-oriented brand. It replaced the Deskpro brand of desktops and the Armada brand of notebooks. [1]
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 ...
[1] [7] [9] For a thin 32-blade fan, the strength of carbon fiber composite material is strong enough, [1] with a weight of only 1.05% of the total aircraft weight. [1] The total weight of the lift fan system including the bearings, gears, and rings can be hopefully controlled to less than 5% of the aircraft weight. [1]