MIT Engineers Create Green Dual-Mode Engine for CubeSats

At MIT, engineers have developed a CubeSat engine that achieved a specific impulse of 600 seconds with electrospray thrusters, all while running both chemical and electric modes from a single tank of green propellant. This is no mere upgrade; it's a revolution. Small satellites traditionally compromised between power and efficiency in propulsion, but MIT's new system offers both from a single, unified green fuel source, eliminating a critical trade-off for compact spacecraft. This dual-mode green propulsion system appears poised to redefine CubeSat operational scope and mission longevity, potentially accelerating the deployment of more complex and sustainable small satellite constellations. This groundbreaking propulsion system combines an electrospray thruster with a chemical rocket, utilizing a novel 'green' propellant called ASCENT (formerly AF-M315E), according to Universe Today.

How Dual-Mode Green Propulsion Works

MIT's AeroAstro lab engineered electrospray thrusters that harness ASCENT, an ionic liquid, according to New Atlas. These ASCENT-fueled thrusters deliver a thrust-to-power ratio of 40–65 micronewtons per watt and an impressive specific impulse of 600 seconds. This two-in-one propulsion system fuels both traditional chemical and electrical thrusters, as detailed by Gizmodo. The system's ability to leverage ASCENT for both high-performance and high-efficiency modes from a single source dramatically expands the operational envelope for CubeSats, unlocking missions previously deemed impossible for such small craft.

Simplifying CubeSat Design with One Propellant Tank

The upcoming Green Propulsion Dual Mode mission, a collaboration with NASA, will rigorously test this two-in-one propulsion system for small spacecraft. It ingeniously uses a single propellant tank for both chemical and electrospray thrusters, according to MIT News. This consolidation of fuel storage into a single tank dramatically streamlines CubeSat design, reduces critical mass, and enhances mission flexibility by eliminating the need for separate, complex propellant systems, confirmed by NewsBytes. This elegant simplification is a silent revolution, freeing up precious space and power for more sophisticated payloads.

The collaboration with NASA on the 'Green Propulsion Dual Mode mission' confirms this technology's immediate, high-stakes application potential. This partnership paves a rapid path to deployment and widespread adoption across government and commercial space. Integrating both high-power chemical and high-efficiency electric thrust from a single green fuel fundamentally alters the cost-benefit analysis for small satellite missions, making them viable for roles previously reserved for much larger, more expensive spacecraft. A specific impulse of 600 seconds for an electrospray thruster on a CubeSat, coupled with the chemical mode, means these tiny satellites can now execute maneuvers requiring significant delta-V and maintain long-term station-keeping. This capability blurs the lines between micro-satellites and traditional, larger spacecraft, dramatically expanding their operational flexibility.

MIT Engineers Develop Green Dual-Mode Engine for CubeSats

How Dual-Mode Green Propulsion Works

Simplifying CubeSat Design with One Propellant Tank

Tags

Benefits of Dual-Mode Engines for Small Satellites

Future Prospects for Green Propulsion in CubeSats

Related articles

How the Big Bang's Leftover Light Reveals What the Universe Is Made Of

Dwarf Planets Explained: The Three IAU Rules and Why 2026 ED138 May Be the Sixth

Oxygen Is the Exoplanet Biosignature Scientists Want Most—and the Hardest to Trust

Four Ways Astronomers See the Invisible: How Black Holes Are Actually Studied