ISRO Achieves Breakthrough in Testing Cryogenic Engine For LVM3 Mission
The successful performance validated both the engine and the Nozzle Protection Syste
Nellore: In a significant milestone in India's heavy-lift launch programme, the Indian Space Research Organisation (ISRO) has successfully conducted the flight acceptance hot test of its indigenous CE20 cryogenic engine using a newly developed Nozzle Protection System (NPS) for the first time.
The test carried out on Monday, July 6 at the Main Engine & Stage Test Facility within the ISRO Propulsion Complex at Mahendragiri marks a major technological advancement. It is expected to simplify cryogenic engine testing while reducing resources and enabling longer-duration tests.
CE20 engine powers the upper stage of the LVM3 launch vehicle. It has already proved its reliability by powering eight consecutive LVM3 missions, including Chandrayaan-2, Chandrayaan-3, and three commercial launches. The engine has also completed the stringent human-rating qualification required for the upcoming Gaganyaan mission.
The newly developed NPS enables the CE20 engine, equipped with its full area-ratio-100 nozzle, to be tested in sea-level conditions—eliminating the need for complex High Altitude Test facilities. The innovation is expected to streamline engine qualification while enhancing testing efficiency.
During the latest test, the CE20 engine operated at a thrust of 19.5 tonnes for 45 seconds before being ramped up to its maximum rated thrust of 22 tonnes for 25 seconds. The successful performance validated both the engine and the Nozzle Protection System.
Following refurbishment, the tested engine will be integrated with the C32 cryogenic stage for the LVM3-M7 mission, further strengthening ISRO's capability to support future satellite launches and human spaceflight missions.
