Engine manufacturer has sought several patents for open-fan designs in the past two years, even as it publicly commits to ...

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 ...

However, the big problem until now has been the noise generated by open fans: unducted fan blades are much noisier than ducted fan blades. The CFM RISE engine, however, takes a totally new ...

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 ...

U.S. engine makers looked at so-called unducted fans in the1980s before dropping the idea when oil prices fell. At the time, such engines were also considered too noisy.

If you ask GE’s chief engineer Chris Lorence, the time for open fan is now. Why? Since GE first flew an unducted fan in the 1980s, the open fan engine design has been made simpler and lighter ...

GE Aerospace (NYSE:GE) and Rtx Corp (NYSE:RTX) presented different visions for the future of flight. GE backs its unducted fan technology through the CFM RISE program, while RTX remains committed to ...

LYON—Safran Aircraft Engines is coordinating a European technology demonstration program that is intended to pave the way for the flight testing of an open-fan engine in 2027.

It is not the first time engine makers have looked atrevisiting the design of the traditional jet engine. U.S. engine makers looked at so-called unducted fans in the1980s before dropping the idea when ...

U.S. engine makers looked at so-called unducted fans in the1980s before dropping the idea when oil prices fell. At the time, such engines were also considered too noisy. But the completely fresh ...