The Indian Space Research Organisation (ISRO) efficiently carried out the third sizzling take a look at of its semi-cryogenic engine Power Head Test Article (PHTA) on 28 Might 2025 on the ISRO Propulsion Complicated (IPRC), Mahendragiri. The take a look at is a part of a collection of efficiency evaluations geared toward validating key subsystems of the 2000 kN-class SE2000 engine that may ultimately energy the SC120 propulsion stage meant to exchange the present L110 liquid core stage of the LVM3 launch automobile. ISRO started this collection of efficiency evaluations in March 2025, specializing in crucial elements comparable to low- and high-pressure turbo-pumps, the pre-burner, the start-up system, and numerous management mechanisms.
The three-phased trials
Based on the official ISRO press release, the PHTA has undergone two sizzling assessments earlier, which included all programs besides the thrust chamber. The primary take a look at on 28.03.2025 demonstrated the sleek ignition & bootstrap operation over a brief length of two.5 seconds. The second sizzling take a look at on 24.04.2025 demonstrated the beginning transient build-up and examined the start-up sequence by finishing up a hot-firing for a length of three.5 seconds. The third take a look at was carried out for a length of three seconds to fine-tune additional & finalize the start-up sequence.
The SE2000 employs an oxidizer-rich staged combustion cycle utilizing liquid oxygen and kerosene. It is ready to ship a chamber stress of 180 bar and a particular impulse of 335 seconds—an improve over the L110 stage’s hydrazine-based propulsion.
Future Integration and Impression on Indian Launch Functionality
With the subsystem validations full, ISRO will now start built-in engine-level trials, shifting towards full operational readiness. The SC120 stage powered by SE2000 is predicted to extend LVM3’s payload capability from 4 to five tonnes to Geostationary Transfer Orbit (GTO) and from 8 to 10 tonnes to Low Earth Orbit (LEO).
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