Second Successful Test Marks Key Progress
The Indian Space Research Organisation (ISRO) achieved another milestone on 24 April 2025, by successfully conducting a short-duration hot test of its Semicryogenic Engine. The test took place at the ISRO Propulsion Complex (IPRC) in Mahendragiri. This ignition test marks the second major achievement following the successful first hot test held on 28 March 2025.
The series of tests forms a critical part of ISRO’s ongoing Semicryogenic engine development programme. Each stage is designed to move the project closer to operational readiness for future launch vehicles.
ISRO Hot Test Validates Start-up Sequence
During this latest trial, the Engine Power Head Test Article was evaluated. This assembly includes all key engine systems, except the thrust chamber. The hot test lasted for 3.5 seconds, focusing on validating the engine’s start-up sequence.
The engine was successfully ignited and operated steadily, reaching up to 60% of its rated power. The trial demonstrated stable and controlled performance throughout, providing confidence in the engine’s start-up operations.
Preparing for Future Launch Vehicles
These tests are part of a carefully planned series to confirm the design strength and performance of important subsystems. Critical elements being evaluated include the low-pressure and high-pressure turbo pumps, the pre-burner, and associated control systems.
Data gathered from these hot tests will help finalise the operational sequence of the complete Semicryogenic engine. With these results, ISRO moves one step closer to the full integration of the Semicryogenic engine into its launch vehicle programme.
Further qualification tests are scheduled to validate the entire engine system comprehensively. This effort will ultimately enable ISRO to enhance the capabilities of its future space missions.
with inputs from Reuters