You can adjust the ratio of these two flows; a high bypass ratio is great when you want an engine that's quiet and efficient, a low ratio works when you're prioritizing speed and agility. Nearly every ...

China has begun flight testing a high-bypass ratio turbofan that will greatly improve the performance of the Y-20 heavy airlifter and potentially power the C919 commercial aircraft. The engine is the ...

Following the first run of the UltraFan demonstrator, Rolls-Royce looks to speed progress toward application of the engine on an airframe. The Rolls-Royce UltraFan features an ultra-high bypass ratio ...

This Williams FJ44-3ATW turbofan engine powered the Virgin Atlantic Global Flyer. The lightweight, powerful, highly efficient jet engine enabled Steve Fossett to pilot the Global Flyer around the ...