The 90-Inch Fan Rolls-Royce Thinks Will Break The CFM, Pratt & Whitney Narrowbody Duopoly

The prototype engine in development by Rolls-Royce set to herald its return to the narrowbody market is known as the UltraFan. That moniker isn't just hyperbole; its name draws directly from the exceptionally wide face of its turbine blades. Behind that huge first stage of air intake is a proportionally very high bypass ratio to maximize both thrust and fuel efficiency.