The fan and the hot gases provide thrust. General Electric is also trying to develop a Space-Age, propeller-driven engine. Its project, called the Unducted Fan Engine, also is funded in part by NASA.

The engine is called an unducted fan, or UDF, because the blades are uncovered. ”With all its talk about the propfan, Boeing is holding up a carrot, keeping orders for the A320 at bay,” Smith ...

Boeing Co. said it selected General Electric Co.`s new unducted fan engine as the base power source for its new 7J7 airliner. Boeing selected GE after rejecting a competing engine from Internationa… ...

If one chooses the unducted-fan (UDF) engine path, as mentioned in “Smoke and Mirrors” (AW&ST July 26, p. 32), a viable UDF will not be available much before 2025. Can an airframer start now ...

The principal goal of this program is to develop an unducted open fan engine, but this could easily be shifted to a ducted design if necessary.

Although no work of art, this engineering achievement is the Pratt & Whitney/Allison 578-DX unducted fan, which, along with the similar General Electric GE36, successfully demonstrated the fuel ...

General Electric is joining with NASA to revive studies of its long-abandoned GE36 unducted fan, or “open rotor” and is simultaneously launching a next-generation CF34 technology effort as ...

General Electric designed this proof-of-concept turboprop “unducted fan” engine as part of NASA’s Advanced Turboprop Project, which was aimed at overcoming the three-fold increase in fuel prices ...

The open-rotor work builds on the unducted fan flight-test programme of the late 1980s and will incorporate Leap-X technologies where appropriate.

Promising 60% fuel savings and faster boarding, the 7J7 aimed to revolutionize short-haul flying with advanced materials, fly-by-wire controls, and a unique unducted fan engine.

GE Aerospace's joint venture, CFM International, is developing a revolutionary new engine that could change the face of ...

Boeing Co.'s commercial aircraft chief, Jim Albaugh, said today he's not certain that so-called unducted-engine technology will ever be viable. “I have a hard time believing that's ever going to ...