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Isro successfully conducts third hot test of semicryogenic engine
According to Isro, the test, conducted on May 28, was aimed at validating the engine's ignition and start-up sequence while optimising the process for integrated engine performance
Press Trust of India Bengaluru
The Indian Space Research Organisation on Monday achieved a significant milestone with the successful completion of the third hot test of the Power Head Test Article (PHTA) at the Isro Propulsion Complex in Mahendragiri, Tamil Nadu.
The test is part of a crucial series of evaluations to validate the performance of India's upcoming semicryogenic engine, Isro said.
This marks the third in a series of hot tests undertaken by Isro for the PHTA.
According to Isro, the test, conducted on May 28, was aimed at validating the engine's ignition and start-up sequence while optimising the process for integrated engine performance.
During the three-second trial, the engine was ignited successfully and operated up to 60 per cent of its rated power level, exhibiting stable and controlled performance throughout.
Isro began this series of performance evaluations in March 2025, focusing on critical components such as low- and high-pressure turbo-pumps, the pre-burner, start-up system, and various control mechanisms.
The first test, conducted on March 28, 2025, confirmed smooth ignition and bootstrap operation during a 2.5-second run.
The second test, carried out on April 24, focused on the start transient build-up and validated the ignition sequence over a 3.5-second duration.
The Semi-Cryogenic Propulsion Stage (SC120), powered by the 2000 kN-class SE2000 engine, is being developed to replace the current liquid core stage (L110) of the LVM3 launch vehicle towards enhancing its payload capability, Isro said.
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