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波音称７４７—４００Ｘ设计将达到甚至超过全新设计的Ａ３ＸＸ飞机的运营成本目标，波音正对一４００Ｘ进行最后的细化设计，风洞试验于今年２季度完成，计划于２００３／２００４年间投入使用。７４７一４００Ｘ的座位数超过５００座，航程１４３３０千米。为了增加航程和运
Boeing said that the 747-400X design will meet or even exceed the operating cost target of the newly designed A3XX aircraft. Boeing is finalizing the design of a 400X. The wind tunnel test was completed in the second quarter of this year and is planned to be put into use in 2003/2004. The 747-400X has more than 500 seats and a range of 14,330 kilometers. In order to increase voyage and transport