The JT8D-219 engine will enable a re-engined Joint STARS aircraft to operate with more thrust, while consuming less fuel, compared to the TF33 engines originally installed.

JT8D-219发动机将使升级后的联合星飞机引擎比原先安装的TF33发动机拥有更多的推力，消耗较少的燃料。

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The XCOR team then developed a more powerful engine with an advanced pump-fed fuel system for a larger aircraft now being flight-tested for a commercial customer.

公司的科研小组，正在采用先进泵式喂料系统，为大型飞行器，研制动力更加强大的引擎，现在正在为商业客户的需求，进行飞行测试实验。

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A turboprop handles a larger airflow than any other aircraft engine and so (at low speeds) generates the largest thrust for any given rate of fuel consumption.

一个涡桨可以比其他的飞机发动机多处理一些气流，因此在低速时，无论给定的燃料占总量的比例是多少，都会产生最大的推力。

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Aircraft and engine designers are investing in fuel efficient aircraft.

CNN: Flight of biofuel fancy?

But the shift towards synthetic fuel has provoked criticism, because when such fuel is made from coal and then burned in an aircraft engine, more greenhouse gases are emitted overall than would be produced if the aircraft simply burned conventional fuel derived from oil.

ECONOMIST: Monitor

He singled airplane manufacturer Sukhoi Company, saying Russian made aircraft should be competitive with their foreign rivals in terms of engine noise, fuel economy and flight distance.

FORBES: Russia's Medvedev Wants Govt Out of Business