Basic and Applied Studies of the Ram Accelerator as a High Performance Launcher

Abstract : The ram accelerator is a hypervelocity launch concept that uses a confined, in-tube ramjet propulsive cycle to generate thrust for the acceleration of a projectile. Key technical issues involving the starting and operation of the ram accelerator were investigated at fill pressures up to 200 atmospheres. The research was initiated to evaluate the feasibility of using a ram accelerator of limited length for specific applications, e.g., mobile or ship-based. In particular, it was determined that modification to both projectile materials and configurations were necessary to ensure operation at the highest mixture fill pressures. The report summarizes the results of that investigation.