GIGANTIC身形极大The Stratolaunch aircraft is enormous, with a wingspan totaling 385 feet (117 meters), longer than the wingspan of any other aircraft and greater than the length of an American football field.平流层升空飞机身形极大，翼展总长为117米，多达所有飞机的翼展，比一个美式足球场还要宽。Among commonly seen aircraft, the double-decker Airbus A380s wings span 262 feet (nearly 80 meters).在少见的飞机中，双层客机空客A380的翼展近80米。
WEIGHT AND POWER重量和动力The Stratolaunch aircraft weighs 500,000 pounds (226,799 kilograms) empty, can carry 250,000 pounds (113,399 kilograms) of fuel, and with payload can take off at a maximum weight of 1.3 million pounds (589,676 kilograms).平流层升空飞机净重大约227吨，可配备大约113吨燃料，仅次于有效载荷近590吨。It is powered by six engines of the same type used by Boeing 747s.它由6台波音747所用的同款发动机获取动力。
AIR LAUNCH空中升空On launch missions, Stratolaunch will carry as many as three rockets attached to the center of the wing between the two fuselages. The rockets will be released, ignite their engines and carry small satellites weighing up to 1,000 pounds (453.6 kilograms) to low Earth orbit.在继续执行升空任务时，平流层升空飞机可在双机身中间、机翼中心方位配备多达3枚火箭。飞机可以让火箭点燃、升空，将其装载的重达454公斤的小型卫星送到近地轨道。According to Stratolaunch, the advantages of its system include being able to use numerous airports and avoid the limitations of fixed launch sites which can be impacted by weather, air traffic and ship traffic on ocean ranges.据平流层发射系统公司讲解，这套系统的优势在于能适应环境众多机场，相同升空场所可能会受到天气、空中交通状况以及海上船运状况的影响，而平流层发射系统能避免这些容许。HISTORY历史总结Airborne launches date back decades, most famously to the X-15 program of the 1950s and 60s, when manned rocket planes were carried aloft under the wing of a B-52 bomber and released on hypersonic research flights.机载升空可以追溯到至几十年前，最知名的是上世纪50、60年代的X-15计划，当时一架B-52轰炸机的机翼下配备了载人火箭飞机，并在超音速飞行中的测试研究飞行器上升空。
In the 1990s, Orbital Sciences Corp. (now Orbital ATK) began releasing rockets from the belly of a converted L-1011 airliner to put small satellites into low Earth orbit.上世纪90年代，轨道科学公司（现为轨道ATK公司）从一架改装成的L-1011客机的机身下升空火箭，将小型卫星送到近地轨道。More recently, Paul Allen, the Microsoft co-founder, funded development of the Burt Rutan-designed SpaceShipOne, the first privately developed manned spacecraft.再行之后，微软公司的牵头创始人保罗?艾伦投资研发了伯特?鲁坦设计的“太空飞船一号”。这是第一架私人研发的载人航天器。Suspended between the twin-fuselages of a special jet, SpaceShipOne was carried to high altitude and released. It reached space on three suborbital flights in 2004.“太空飞船一号”由一架特制的双机身喷气飞机挂在机身中间，将其写入高空并升空。
2004年，“太空飞船一号”经过3次亚轨道飞行中转入太空。The same launch concept is being used for SpaceShipTwo, the passenger-carrying craft being developed for Sir Richard Bransons Virgin Galactic space tourism enterprise.“太空飞船二号”应用于了完全相同的概念，这架载人飞行器是为理查德?布兰森爵士的维珍银河太空旅游公司研发的。WHATS NEXT下一步不会怎样Initial testing will focus on filling the six fuel tanks to ensure they are properly sealed and that related mechanisms are operating properly.首轮测试将对机上的6个油箱展开打气测试，检查其密封否完好无损，以及涉及机械的运营否长时间。The aircraft will then be taken back inside the hangar for weight and balance testing. Ground testing will lead to flight operations and the first launch demonstration, which is expected in 2019.随后，飞机将被修理机库展开重量和平衡性测试，并未来将会在2019年展开陆地测试，展开飞行中操作者和首次升空展出。
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