MIT engineers are developing a new spacecraft propulsion system that combines the strengths of traditional chemical rockets with the efficiency and precision of electric thrusters.
The technology could give small satellites far greater flexibility in space. Instead of relying on separate fuel systems for different types of maneuvers, future spacecraft could use a single propellant to perform both rapid movements and slow, highly controlled adjustments.
At the center of the approach is a specialized fuel that works with both chemical and electric propulsion systems. Until now, these technologies have typically required separate propellants and hardware, adding weight and complexity.
"If you can have chemical and electrical propulsion in one small package, it's the best of both worlds," says Amelia Bruno, a former postdoc in MIT's Department of Aeronautics and Astronautics (AeroAstro). "This opens the door for small satellites to do even more science, more observations, and more interesting missions, all on a smaller and cheaper platform."
Bruno is the lead author of a new study published in the Journal of Propulsion and Power. The research demonstrates that a "green monopropellant" originally developed by the U.S. Air Force for chemical propulsion can also successfully power miniature electric thrusters known as electrospray thrusters.
