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Power Promise

机译：电力承诺

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摘要

It is a well-established truism in aerospace that leaps in propulsion technology almost always precede major advances in spacecraft or aircraft design. As the clamor for affordable access to space continues to grow, there is mounting interest in the Synergetic Air-Breathing Rocket Engine (Sabre) concept under development by U.K.-based Reaction Engines. This hybrid powerplant is designed to bridge the infamous power gap between air breathers and rockets, potentially enabling a vehicle to accelerate from a standing start on the runway all the way to low Earth orbit. Such an engine could power highspeed aircraft, suborbital craft or even multi- and single-stage-to-orbit vehicles. Even more encouraging to Sabre proponents is that, while earlier attempts to harvest oxygen from the atmosphere succumbed to thermo- dynamic reality, the Reaction design continues to pass muster with experts in Europe and the U.S. The company's most recent-and possibly most valuable-vote of confidence comes from the U.S. Air Force Research Laboratory (AFRL), which analyzed Sabre under a cooperative research and development agreement.
机译：这是航空航天业公认的真理，推进技术的飞跃几乎总是在航天器或飞机设计的重大进步之前。随着人们对可负担得起的太空访问的呼声不断增长，英国的反应发动机公司正在开发“协同空气呼吸火箭发动机”（Sabre）概念。这种混合动力装置旨在弥合空气呼吸器和火箭之间臭名昭著的动力间隙，有可能使车辆从跑道上的站立起步一直加速到低地球轨道。这样的发动机可以为高速飞机，亚轨道飞行器甚至多级和单级轨道飞行器提供动力。对于Sabre支持者而言，更令人鼓舞的是，尽管较早的尝试是从屈服于热力学现实的大气中收集氧气，但“反应”设计仍继续受到欧洲和美国专家的追捧。该公司的最新投票也许是最有价值的投票信心来自美国空军研究实验室（AFRL），该实验室根据一项合作研发协议对Sabre进行了分析。

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