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777-300ER Range Increased

机译:777-300ER射程增加

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摘要

Boeing will boost the operating efficiency of the longer-range 777-300ER by about 2.25% late next (year, increasing its maximum range by 175 naut. mi. to 7,880 and adding a nominal 5,000 lb. to its pay-load capacity. The improvements include a 0.8% savings in specific fuel consumption (SFC) by the aircraft's 115,000-lb.-thrust GE90-115B engines. A slight redesign of the engine's low-pressure turbine blades and vanes, changes in their coatings, and improved tip clearances in the LPT and high-pressure compressor were among the modifications, a company official said. These were called for following results of endurance tests at General Electric's Peebles, Ohio, engine test facility.
机译:波音公司将在明年晚些时候将较远距离的777-300ER的运行效率提高约2.25%(年),将其最大航程增加175里特至7880英里,并名义上增加5,000磅的载重量。改进包括:飞机的115,000磅推力GE90-115B发动机在单位油耗(SFC)方面节省了0.8%;对发动机的低压涡轮叶片和叶片进行了略微的重新设计;更改了涂层;并改善了叶尖间隙一位公司官员说,LPT和高压压缩机上的改动是其中的一些修改,是为了在通用电气公司位于俄亥俄州皮布尔斯的发动机测试设施进行耐久性测试而得出的结果。

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