CE20 Cryogenic Engine
Why in News?
The Indian Space Research Organisation (ISRO) successfully conducted the flight acceptance hot test of the CE20 cryogenic engine on 6 July 2026 at the ISRO Propulsion Complex (IPRC), Mahendragiri, Tamil Nadu. The engine is designated for the upper stage of the LVM3 launch vehicle and will power the LVM3-M7, the seventh operational mission of India’s heavy-lift launch vehicle. The successful test marks another important milestone in strengthening India’s indigenous space launch capabilities.
CE20 Cryogenic Engine and Its Significance
The CE20 is India’s indigenously developed cryogenic rocket engine designed for the upper stage of the Launch Vehicle Mark-3 (LVM3). Cryogenic engines use super-cooled liquid propellants, such as liquid hydrogen and liquid oxygen, which provide high efficiency and greater thrust, making them ideal for launching heavy payloads into orbit. The CE20 engine forms the backbone of India’s heavy-lift space missions and plays a crucial role in advanced satellite launches and deep-space exploration.
Successful Hot Test with New Nozzle Protection System
A major highlight of the test was the first-ever use of ISRO’s newly developed Nozzle Protection System during a flight acceptance test. The system enables safe engine testing under simulated high-altitude conditions, enhancing reliability and operational safety.
During the test, the engine generated 19.5 tonnes of thrust for 45 seconds, followed by its maximum rated thrust of 22 tonnes for 25 seconds. The successful performance validated the engine’s readiness for the upcoming LVM3-M7 mission. The tested engine will now undergo refurbishment before being integrated with the C32 cryogenic stage of the launch vehicle.
CE20’s Role in LVM3 and Gaganyaan
The CE20 engine has already demonstrated its reliability by successfully powering the upper stage in eight consecutive LVM3 missions, including the historic Chandrayaan-2, Chandrayaan-3, and three commercial satellite launches. Significantly, the engine has also met the human-rating qualification requirements for India’s Gaganyaan Human Spaceflight Programme, confirming its suitability for carrying astronauts safely into space.
Important Facts for Exams
- CE20 is the indigenous cryogenic engine used in the upper stage of LVM3.
- ISRO Propulsion Complex (IPRC) is located at Mahendragiri, Tamil Nadu.
- The engine successfully completed a flight acceptance hot test on 6 July 2026.
- During testing, it produced 19.5 tonnes of thrust for 45 seconds and 22 tonnes for 25 seconds.
- The Nozzle Protection System was used for the first time in a flight acceptance test.
- The tested engine will power the LVM3-M7 mission after integration with the C32 cryogenic stage.
- CE20 has successfully flown in eight consecutive LVM3 missions, including Chandrayaan-2 and Chandrayaan-3.
- The engine has achieved human-rating qualification for India’s Gaganyaan Mission.
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