The Stratolaunch aircraft, a project backed by Microsoft co-founder Paul G. Allen, rolled out of the hangar for the first time May 31. The massive, one-of-a-kind aircraft is designed to carry satellite payloads of up to 550,000 pounds to about 30,000 feet, where they can be launched into low Earth orbit. The Stratolaunch is the world's largest aircraft by wingspan, measuring 385 feet from wing tip to wing tip-longer than a football field. It's the largest all-composite aircraft ever built. The aircraft stretches 238 feet from nose to tail, and the top of the tail stands 50 feet above the ground. It weighs about 500,000 pounds and is powered by six turbofan engines.
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机译：由微软联合创始人保罗·艾伦（Paul G. Allen）支持的Stratolaunch飞机项目于5月31日首次从机库中撤出。这种庞大的同类飞机旨在携带高达550,000的卫星有效载荷重约30,000英尺，可以将它们发射到低地球轨道。 Stratolaunch是按翼展计算的世界上最大的飞机，距机翼尖端到机翼尖端的距离比足球场长385英尺。这是有史以来最大的全复合材料飞机。飞机从鼻子到尾巴伸展238英尺，而尾巴的顶部高出地面50英尺。它重约500,000磅，由六个涡轮风扇发动机提供动力。
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