The Experimental Rocket Propulsion Society (E.R.P.S.), founded in February 1993, is a dynamic community of amateur rocketry enthusiasts committed to advancing the field of liquid fuel rocket technology. With a focus on safety and innovation, E.R.P.S. develops and tests high-density, room-temperature-storable propellants, prominently featuring high-purity hydrogen peroxide. The society aims to achieve single-stage access to Low Earth Orbit (LEO) through a series of progressively advanced rocket vehicles, overcoming challenges related to vehicle control and catalyst development.

Members engage in hands-on activities, participating in rocket tests, design meetings, and collaborative projects. E.R.P.S. offers various membership tiers—Observer, Participating, and Executive—catering to diverse involvement levels. Regular meetings are hosted both in-person and virtually, fostering a collaborative environment where knowledge is shared and innovation thrives. With a rich history of successful launches and ongoing research, E.R.P.S. invites those passionate about rocketry to join its mission to unlock access to space and contribute to exciting developments in rocketry technology.