scramjet

Earlier this week, the Air Force announced that the X-51 WaveRider, a wingless scramjet, would make its first hypersonic flight..本周初，美国空军宣布，超音速燃烧冲压发动机驱动的X-51“驭波者”将进行其首次超音速飞行。

NASA built the X43A under a ＄250 million program to develop and test an exotic type of engine called a supersoniccombustion3 ramjet4, or scramjet..美国航空航天局为建造X43A耗资2.5亿美元，用于开发和测试一种新型的引擎，叫做超音速燃烧冲压式喷气引擎(简称scramjet)。

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..在美国宇航局研究中心，一个新的超音速燃烧冲压喷气发动机（scramjet）通过了模拟2008年5月5日环境的地面测试。