Neumann Space

Neumann Space is an Adelaide, Australia-based electric propulsion company founded in 2015 by Dr. Patrick Neumann, developing the Neumann Drive — a cathodic arc electric propulsion system that uses solid metal propellants rather than the pressurized gases or liquids used by conventional electric thrusters. The technology's most distinctive feature is propellant flexibility: the Neumann Drive can theoretically use virtually any conductive metal as propellant, including magnesium, titanium, molybdenum, bismuth — and potentially recycled space debris materials — dramatically expanding the potential propellant options for long-duration missions.

The Neumann Drive operates by generating a cathodic arc discharge that vaporizes and ionizes metal from a solid rod or disc propellant source. The resulting metal plasma is electrostatically accelerated to produce thrust with specific impulse (Isp) values ranging from approximately 1,000 to over 14,000 seconds depending on propellant material and discharge parameters — making it competitive with or exceeding gridded ion engines for high-Isp mission profiles. The system requires no pressurized propellant tanks, greatly simplifying spacecraft integration compared to Hall thrusters or ion engines that require xenon or krypton storage.

The debris-as-fuel concept addresses the space sustainability narrative: if future debris remediation missions could capture and process metallic debris (aluminum, titanium, or steel structural components from defunct satellites) into propellant for subsequent missions, it would close a resource loop that makes debris removal economically self-sustaining. While operationally complex, this vision positions the Neumann Drive as a technology aligned with the space sustainability regulatory momentum.

Neumann Space has performed ground test demonstrations and is developing flight-qualified versions for cubesat and microsatellite platforms. The company has received funding from the Australian Space Agency and has participated in Australian government commercial space development programs. Neumann Space competes with Enpulsion (FEEP), Phase Four (RF plasma), and ECProp (cathodic arc) in the niche high-Isp small satellite propulsion market where propellant flexibility is a valued differentiator.