BENGALURU: The Indian Space Research Organisation (Isro) said on Thursday that it successfully conducted a sea-level hot test of its CE20 Cryogenic Engine at the ISRO Propulsion Complex in Mahendragiri late last month. The announcement came after ISRO completed the analysis of the test data. The breakthrough test, conducted on November 29, addressed significant technical challenges associated with high-area ratio nozzle testing, demonstrating ISRO’s advanced engineering capabilities.
“The CE20 engine, developed by Isro’s Liquid Propulsion Systems Centre (LPSC), features an innovative Nozzle Protection System that overcomes previous complexities in engine testing. During the test, engineers demonstrated the performance of a multi-element igniter, a critical component for engine restart capabilities,” ISRO said.
This achievement, it added, was particularly noteworthy as the restart of a cryogenic engine is typically a complex process involving intricate technical challenges. “The test revealed remarkable technical progress, with engineers activating only the first element of a multi-element igniter while monitoring the health of the other two elements. Both the engine and facility performance were normal, and all required engine performance parameters were achieved as anticipated,” Isro said.
Pointing out that the success underscores its expertise in developing sophisticated rocket propulsion technologies, the space agency said the CE20 engine has proven its versatility by powering the upper stage of the LVM3 launch vehicle in six missions. “It was qualified for various thrust levels, including 19 tonnes for current missions, 20 tonnes for the Gaganyaan mission, and an impressive uprated 22 tonnes for future launch capabilities. This flexibility highlights the engine’s potential to enhance India’s space exploration and satellite launch capabilities,” Isro said.
Key achievements of the test include: successful testing of an engine with a nozzle area ratio of 100, evaluation of a multi-element igniter by activating only the first element, and confirmation of normal engine and facility performance. This test marks a significant step in ISRO’s indigenous engine development, showcasing its ability to overcome complex rocket propulsion challenges.