University of Glasgow develops 'self-consuming' rocket engine to fight space debris
The Ouroborous-3 engine uses its own plastic fuselage as fuel, potentially reducing orbital waste and increasing payload efficiency.
Researchers in Scotland have developed a novel rocket engine capable of consuming its own structure to generate thrust. The project, led by a team from the University of Glasgow, introduces a concept known as autophagy—or 'self-eating'—to aerospace propulsion.
The engine, named Ouroborous-3, was developed in collaboration with partners from Kingston University and Dnipro National University. During successful test-firings at the Machlab facility located at Machrihanish Airbase in Scotland, the engine produced 100 newtons of thrust. Unlike traditional rockets that rely solely on dedicated propellant tanks, the Ouroborous-3 utilizes waste heat from its own combustion process to melt its plastic fuselage, which is then fed directly into the combustion chamber as additional fuel.
A New Approach to Propulsion
This mechanism represents a significant departure from standard rocket design. While traditional high-efficiency engines focus on complex combustion cycles to maximize propellant use, the autophagy approach focuses on the structural utility of the vehicle itself. By turning the rocket's body into a consumable energy source, the design minimizes the amount of dead weight that typically remains after a mission's primary fuel is exhausted.
Reducing Orbital Waste
The implications for the space industry are twofold: sustainability and capacity. As the number of satellites in low Earth orbit grows, the accumulation of space debris has become a critical risk to global infrastructure. Because the Ouroborous-3 is designed to consume its own fuselage, it inherently reduces the amount of structural waste left behind in space after the engine has performed its task.
Furthermore, the ability to use the fuselage as fuel allows for a reduction in the size and number of onboard propellant tanks. This weight saving can be directly translated into increased payload capacity, allowing operators to launch more equipment or scientific instruments without increasing the overall size of the launch vehicle.
The Path Forward
While the successful test at Machrihanish proves the viability of the autophagy concept, the technology remains in the research and development phase. Future efforts will likely focus on scaling the thrust output beyond the initial 100 newtons and testing the durability of various plastic composites to optimize the combustion rate. Observers of the UK space sector will be watching to see if this university-led innovation can be transitioned into commercial applications for small-satellite deployment.