MIT engineers have unveiled a groundbreaking hybrid propulsion system that merges the rapid thrust of chemical rockets with the fuel efficiency of electric thrusters, all powered by a single innovative propellant. This advance could soon enable compact CubeSats to travel to Mars and beyond.
- Hybrid thrusters use one fuel for chemical and electric modes
- ASCENT is a non-toxic ionic liquid propellant enabling versatility
- Upcoming NASA mission will test the tech in orbit this year
What happened
Engineers at MIT have successfully tested a hybrid propulsion system designed for small satellites, notably CubeSats, that integrates chemical rocket thrust with electric propulsion using a single type of fuel. This innovation addresses the challenge of needing two separate fuel tanks and propulsion types to achieve both rapid orbital adjustments and long-duration maneuvers in a compact satellite platform. The breakthrough came from leveraging ASCENT, an Advanced SpaceCraft Energetic Non-Toxic propellant developed by the U.S. Air Force, which uniquely functions as an ionic liquid capable of powering both thruster modes.
The MIT team demonstrated that ASCENT could fuel electrospray thrusters by firing these thrusters on a CubeSat mock-up suspended on a magnetic levitation platform simulating space conditions. Results showed efficient continuous operation with thrust-to-power ratios and specific impulses comparable to or exceeding performance from traditional electrospray propellants, all while running on the same propellant used for chemical thrust. This hybrid system could soon be tested in space aboard a CubeSat planned for launch later this year in collaboration with NASA.
Why it feels good
This hybrid propulsion technology offers a significant leap in small satellite capability by combining the best of chemical and electric thrusters without the complexity and space demands of separate fuel tanks. This means future CubeSats can deliver rapid, powerful orbital changes when needed and operate long missions with high fuel efficiency, all within a tiny, cost-effective package. Utilizing ASCENT, a non-toxic and environmentally friendlier propellant, further advances safer and more sustainable space travel.
The ability to equip small missions with such adaptable propulsion opens exciting new possibilities for space exploration and practical applications alike. For instance, swarms of CubeSats could be deployed to monitor weather systems or track natural disasters with unprecedented precision. Longer term, this innovation could enable tiny spacecraft to make the journey to Mars, the asteroid belt, or other destinations once thought too ambitious for their size—bringing interplanetary exploration within reach for smaller organizations and research groups.
What to enjoy or watch next
Keep an eye on the Green Propulsion Dual Mode mission, a pioneering CubeSat project from MIT and NASA that will carry both the chemical and electrospray thrusters powered by a single ASCENT tank. This mission, scheduled for launch in the near future, will be the first to demonstrate hybrid propulsion with shared fuel in space, setting a milestone for the cube satellite community and broader aerospace innovation.
As these thrusters prove their reliability in orbit, we can anticipate a wave of new missions leveraging their advantages. Potentially, CubeSats could make gradual interplanetary cruises using electric thrust and then accelerate rapidly when close to intriguing features or scientific targets using chemical bursts. This dual approach will not only enhance mission flexibility but also help drive down costs, enabling a new era of accessible and ambitious space exploration that we can all look forward to.