Experimental Rocket Propulsion Society

The Experimental Rocket Propulsion Society (ERPS) exists to foster and disseminate knowledge of rocket science, and thereby speed the day when access to space is truly routine. It was founded in February of 1993 to gather interested amateurs in a group that would learn about, design, build, and test liquid fuel rocket engines. Over the next eleven years, the group acquired access to rocket-engine assembly and test facilities and, more important, active members with the skills to make good use of those facilities. We've achieved a number of successes notably, the first repeated amateur launch of the same liquid-fueled vehicle within one 24-hour period.