Why CFM's open-fan engine must solve the acoustic problem that killed GE's 1980s open-rotor program

What was the issue and what impact did it have?
Aviation Week Network

Durability and Efficiency. How Open Fan Could Improve Both

The Open Fan engine, the distinctive architecture that could power the next generation of single-aisle aircraft, targets a ...
Flightglobal

Pratt & Whitney stays true to ducted-fan plan and rejects open-rotor engine for next-generation single-aisle

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 ...
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The modern engines rewriting the rules of what a narrowbody engine can do

The very first powered flight took place back in 1903 when Orville and Wilbur Wright lifted off from Kitty Hawk, North Carolina, aboard the Wright Flyer. The aircraft was powered by a four-cylinder ...