In 2009 GE, working with NASA, America’s space agency, picked up work it had largely set aside in the 1980s on a radically different sort of engine called an unducted fan.

2009年，通用电气和NASA（美国航空航天总署）合作，重新开始19世纪80年代搁置的一项工作，继续一种颠覆传统的无涵道风扇发动机实验。

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GE says it has shaved 136kg, or 3%, off the weight of an engine that propels the Boeing 787 using a ceramic-composites fan case and blade, a world first.

通用电气表示，他们成功地将发动机重量减轻了3%，约136千克，此举促使波音787世界首次使用合成陶瓷风扇机箱和涡轮叶片。

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The F-35B is powered by a single Pratt &Whitney F135 engine driving a Rolls-Royce lift fan.

这架F - 35B战斗机是由普惠公司F135型单一发动机引擎驱动劳斯莱斯升力风扇。

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As for the other incidents that have beset the type over the past few months -- a fan shaft failure on an engine, an oil leak, a windshield crack -- all can safely be put down to teething problems.

CNN: How Boeing can bounce back from Dreamliner problems

One way to increase the efficiency of a high-bypass jet engine is to turn the fan into an open rotor, a bit like returning to propellers, but using two rings of stubby counter-rotating blades.

ECONOMIST: A new way to build a greener jet engine

By contrast, the engine designs for a putative Concorde 2 had a revolutionary double-fan arrangement that would have gone a long way to cutting the noise.

ECONOMIST: Supersonics on the back burner | The