I've just got my final year project assigned. It has to do with a numerical simulation of a Ram Accelerator device. Well, apart of having doubts, which I will post just here proximately, I would want to know some website to learn more about that type of device. Apart of Google sites, which is my task to find them, do you know some web site dedicated to that or some academic site for further explanation?. Thanks in advance. EDIT: Notwithstanding how much I've been googling, I haven't found the difference between Scramjet and Ramjet engine. Anybody knows it?