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General Electric’s ultra-efficient GEnx engine, developed for Boeing’s new 787 and the newest version of the 747, burns up to 15 percent less fuel and is substantially quieter than any of its predecessors. All jet engines send some of the air moving through them into a turbine, where they produce power—the rest is moved around the turbine and accelerated by the fan to supplement that power. GEnx’s wide fan and carefully sculpted blades create a high “bypass ratio” and a quieter engine, since this air is moving more slowly than engines with smaller-diameter fans—yet the engine still produces up to 75,000 pounds of thrust. A new combustor uses tornado-like vortices to more thoroughly mix air and fuel particles for cleaner, more efficient fuel burning. geaviation.com
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