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Design Evolution

机译:设计演进

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摘要

Boeing will lengthen its stretched 787-9's wing slightly to improve its aerodynamic efficiency, a move that takes it a few feet beyond the basic 777. The design changes to the -9 will add about 6 ft. total to the wingspan, bringing it to about 203 ft. The wings of the 777-200/-200ER, which with standard seating of 301 passengers are at the top end of the 250-290 seating that 787-9 will offer, is 199 ft. 11 in. At an 8,600-8,800-naut.-mi. range, however, the 787-9 will have more than a l,000-naut.-mi. advantage over the 777-200 Extended Range.
机译:波音公司将稍微延长其787-9机翼的长度,以提高其空气动力学效率,此举使它比基本777机高了几英尺。对-9进行的设计变更将使机翼总长增加约6英尺,从而使其约203英尺。777-200 / -200ER机翼为199英尺11英寸,其中标准座位为301名乘客,位于787-9将提供的250-290座位的顶端。机翼为8,600英尺。 -8,800海里.mi。但是,787-9的航程将超过1000海里。优于777-200扩展范围。

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