3.06.2025
With these tests completing subsystem validations, Isro plans integrated engine-level trials next.
The Testing occured at the Semicryogenic Integrated Engine Test Facility. (Photo: Isro)
Isro has successfully conducted a series of critical tests for its next-generation 2,000 kN Semicryogenic Engine (SE2000), marking significant progress in enhancing the payload capacity of its flagship LVM3 heavy-lift rocket.
The tests occurred on May 28, 2025, with a third hot test of the Engine Power Head Test Article (PHTA) at Mahendragiri’s Isro Propulsion Complex, validating ignition sequences and stable operation at 60% power.
The PHTA – containing all engine systems except the thrust chamber – underwent three phased tests.
- March 28: Initial 2.5-second test confirmed ignition and bootstrap operations
- April 24: 3.5-second test validated start-up transient build-up
- May 28: Final 3-second test optimized start sequencing for full-engine integration[user input
The SE-2000 engine uses liquid oxygen and kerosene in an oxidizer-rich staged combustion cycle, generating 180 bar chamber pressure and 335-second specific impulse. This non-toxic propellant combination improves performance over the current L110 stage’s hydrazine-based system.
The new SC120 stage powered by SE2000 will replace LVM3’s existing L110 core, increasing:
- Geostationary Transfer Orbit (GTO) capacity from 4 to 5 tonnes
- Low Earth Orbit (LEO) capacity from 8 to 10 tonnes
Testing occurs at the Semicryogenic Integrated Engine Test Facility (SIET), inaugurated in 2024 with real-time data acquisition systems. Isro collaborated with Indian industries for component manufacturing and space-grade kerosene production.
With these tests completing subsystem validations, Isro plans integrated engine-level trials next.
The upgraded LVM3 configuration is expected to enter service by 2027, strengthening India’s position in the global heavy-lift launch market while supporting future lunar and crewed missions.
Quelle: India Today