ISRO Successfully Tests CE20 Cryogenic Engine Ahead of LVM3-M7 Mission

The Indian Space Research Organisation (ISRO) has successfully completed the flight acceptance hot test of its CE20 cryogenic engine designated for the seventh operational mission (LVM-M7) of the LVM3 launch vehicle, marking another milestone in preparations for the rocket's next flight.

The test was conducted at the ISRO Propulsion Complex in Mahendragiri, Tamil Nadu , where the engine was evaluated at its maximum thrust level of 22 tonnes . For the first time in a flight acceptance test, ISRO employed the Nozzle Protection System (NPS) , a technology designed to simplify high-altitude testing, reduce resource requirements, and enable longer test durations. ISRO said the results confirmed the satisfactory performance of both the engine and the new protection system.

The CE20 cryogenic engine powers the upper stage of LVM3 , formerly known as GSLV MkIII , India's heaviest launch vehicle. The engine is qualified to operate at thrust levels ranging from 19 to 22 tonnes and has successfully powered eight consecutive LVM3 missions , including Chandrayaan-2 , Chandrayaan-3 , and three commercial launches.

The engine has also completed human-rating qualification for ISRO's upcoming Gaganyaan human spaceflight programme, underscoring its reliability for crewed missions.

The successful hot test forms part of ISRO's routine flight acceptance process , ensuring the engine meets mission requirements before integration with the LVM-M7 launch vehicle. The achievement reinforces the agency's readiness for its next LVM3 mission while supporting India's expanding space exploration, commercial launch, and human spaceflight ambitions.