The adaptive control characteristics of unchoked solid rocket ramjet engine .
非壅塞固体火箭冲压发动机自适应调节特性。
A simple , essentially tubular jet engine , such as a ramjet .
压式喷气发动机一种简单的，主要为管道式的喷气发动机，如喷压式发动机。
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 .
