Developing new aircraft powered by novel technologies such as un-ducted fans and hydrogen-burning engines remains essentially infeasible without billions and billions of dollars in direct government ...

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 ...

The prospect of a propfan-powered airliner has been revived, with Safran Group revealing that it is evaluating unducted fan technology as a possible powerplant for the next generation of single aisles ...

Boeing and NASA seriously considered LENR (“cold fusion”) for planes in case the technology pans out. Subsonic Ultra Green Aircraft Research Phase II: N+4 Advanced Concept Development (148 pages) This ...

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 ...

GE says it is looking seriously at unducted fan technology as demand for new products like the next-generation narrowbody are better understood. The engine maker notes the reasons now are the same as ...