New Delhi: The Indian Space Research Organisation (ISRO) has successfully conducted the first hot test of a sub-scale LOX-Methane engine thrust chamber, marking a significant leap in India’s space propulsion technology development.
This achievement paves the way for advanced rocket engines set to power the agency’s upcoming Next Generation Launch Vehicle (NGLV).
Details of ISRO LOX-Methane Engine Thrust Chamber Test
On January 27, 2026, ISRO carried out a hot test of a sub-scale thrust chamber equipped with a single-element injector at the Thrust Chamber Test Facility, part of the ISRO Propulsion Complex (IPRC) in Mahendragiri, Tamil Nadu.
This subsystem test achieved a chamber pressure of 56 bar, with ignition and sustained combustion inside the thrust chamber — a critical success indicator — and all systems performing normally.
The thrust chamber and injector head were realised through additive manufacturing (3D printing), showcasing ISRO’s evolving capabilities in cutting-edge propulsion fabrication methods.
Importance of ISRO LOX-Methane Engine Thrust Chamber Test
Liquid Oxygen (LOX) and methane as rocket propellants are emerging as a preferred choice worldwide due to their higher specific impulse, cleaner combustion, better storage characteristics, and safety benefits compared with traditional fuels.
These propellant advantages make LOX-Methane engines ideal for future reusable launch systems, aligning with global space exploration trends.
ISRO’s Next Generation Launch Vehicle
The thrust chamber test is a key step toward developing the Next Generation Launch Vehicle (NGLV), internally referred to as Soorya.
According to official details, NGLV is being designed as a high payload, modular, and reusable launch system capable of carrying up to 30 tonnes to low Earth orbit (LEO).
In the complete configuration, the three-stage NGLV will use clustered LOX-Methane engines in the first two stages, with a cryogenic third stage — a combination expected to provide flexibility, power, and efficiency for both satellite launches and future crewed missions.
The Role of ISRO LOX-Methane Engine Thrust Chamber Test
An optimally designed thrust chamber and injector head are crucial elements in rocket engine performance — especially for cryogenic and high-pressure propulsion systems.
Testing these subsystems at sub-scale helps engineers assess design performance early, refine injector configurations, and de-risk future full-scale engine development.
Further hot tests with different configurations will follow, helping ISRO determine the best injector design for higher thrust and operational reliability.
Importance of Additive Manufacturing in Space Engine Development
The successful use of additive manufacturing (also known as 3D printing) for the thrust chamber and injector head reflects ISRO’s adoption of advanced manufacturing technologies.
Additive techniques allow faster prototyping, reduced part counts, and optimized internal geometries — essential advances for complex rocket engine components.
What’s Next for India’s Space Propulsion
This successful test adds momentum to ISRO’s propulsion roadmap, which includes not only the LOX-Methane engines but also semi-cryogenic and cryogenic engine systems currently under development.
The broader propulsion program supports India’s expanding space ambitions, from commercial satellite launches to deep space exploration and potential crewed missions in the future.
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