CFM is quietly developing an alternative in case open-fan engines don't hit the mark.

This article was updated on Wednesday, February 4, to include additional information on past unducted fan concepts. It was originally published on Monday, February 2. Singapore is positioning itself ...

Pratt & Whitney continues to insist its engine offering for the next generation of single-aisle aircraft will be a traditional ducted fan engine, eschewing the open-fan design of its rival CFM ...