美空军将在今秋对小型空天飞机进行有限的试飞,验证未来空天无人机的自主着陆能力。这种85%比例的无动力飞行器正由波音北美(BNA)公司按一个为期一年、合同费为530万美元的技术发展和验证项目制造,这个项目由设在卡特兰空军基地的新成立的军用航天飞机项目办公室管理。 若干技术发展工作也在并行地进行,它们由美国空军的莱特和菲利普斯实验室管理。例如,小型空天飞机还涉及BNA公司用高温固化的复合材料制造一个中 The U.S. Air Force will conduct a limited test flight of small spacecraft this fall to validate the autonomous landing capability of the future space-based UAV. The 85 percent non-powered aircraft are being manufactured by Boeing North American (BNA) companies for a one-year, $ 5.3 million contract-based technology development and verification project that is being piloted by a newly formed Military Space Shuttle Project Office Management. Several technological developments are also being conducted in parallel, managed by Wright’s and Phillips laboratories at the U.S. Air Force. For example, the small space shuttle also involved BNA’s manufacturing of a medium-temperature cured composite