One of the more animated discussions in civil aviation recently has surrounded the choice of engine – or engine options – to power Boeing’s proposed new mid-market airplane (NMA). But with that ...

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 to invest ...

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 ...

Will spiralling fuel costs and the prospect of carbon credits signal the return of the propfan? Engine makers are dusting off some old concepts On display in Boeing's Future of Flight centre in ...

In the 1980s, Boeing unveiled the 7J7—a twin-aisle, propfan-powered aircraft designed to replace the aging 737 and 727 fleets. Promising 60% fuel savings and faster boarding, the 7J7 aimed to ...

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 International ...