America 's armed forces see potential in hypersonic aircraft , which fly at mach 5 or faster using a type of engine known as a scramjet .
美国军方也注意了超音速飞机的潜在价值,若配置超燃冲压引擎,战机巡航速度可以达到5马赫甚至更快。
In the throng of key technology of scramjet , combustor technology is one of the most difficult , and many countries put their focus on it .
在超燃冲压发动机众多关键技术中,燃烧室技术是其中的难点,也是国内外研究的重点。
In such a scheme , a payload vehicle ( holding , say , a satellite ) would piggyback to high altitude aboard the scramjet , which in theory could reach near-orbital speeds .
From the upper atmosphere , the payload vehicle would launch from the scramjet propelled by something akin to the second stage of a booster rocket , putting the satellite or even a manned vehicle into orbital space without the incredible thrust needed to launch it from the ground .
Here it would reach supersonic speeds and then shift to its scramjet engine . The scramjet scoops up air and mixes it with fuel so it burns as the mixture flows through the engine at supersonic speeds .
A new supersonic combustion ramjet , or scramjet , engine gets put through its paces at a nasa research center in a ground-based test that simulated mach 5 conditions in 2008 .