<p>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.</p>.<p>The test is part of a crucial series of evaluations to validate the performance of India's upcoming semicryogenic engine, ISRO said.</p>.<p>This marks the third in a series of hot tests undertaken by ISRO for the PHTA.</p>.Our missions are planned for India's safety and security, says ISRO chairman.<p>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.</p>.<p>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.</p>.<p>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.</p>.<p>The first test, conducted on March 28, 2025, confirmed smooth ignition and bootstrap operation during a 2.5-second run.</p>.<p>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.</p>.<p>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. </p>
<p>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.</p>.<p>The test is part of a crucial series of evaluations to validate the performance of India's upcoming semicryogenic engine, ISRO said.</p>.<p>This marks the third in a series of hot tests undertaken by ISRO for the PHTA.</p>.Our missions are planned for India's safety and security, says ISRO chairman.<p>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.</p>.<p>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.</p>.<p>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.</p>.<p>The first test, conducted on March 28, 2025, confirmed smooth ignition and bootstrap operation during a 2.5-second run.</p>.<p>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.</p>.<p>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. </p>