ISRO successfully conducted a sea-level hot test of its CE20 cryogenic engine at 22-tonne thrust on March 10, 2026, at Mahendragiri. This test validates higher thrust capability for the LVM3 launch vehicle, helping increase payload capacity for future space missions, including Gaganyaan. The test also demonstrated advanced technologies like nozzle protection and multi-element ignition, ensuring reliable engine performance under challenging sea-level conditions.
ISRO conducted a successful sea-level hot test of the CE20 cryogenic engine on March 10, 2026, at Mahendragiri, Tamil Nadu. The engine achieved a higher thrust level of 22 tonnes. This is an improvement from earlier tests conducted at 19 tonnes.
The CE20 engine is used in the upper stage of the LVM3 launch vehicle. This rocket is India’s heavy-lift launcher used for missions like Gaganyaan. The test lasted 165 seconds and used a Nozzle Protection System and multi-element igniter.
Sea-level testing of cryogenic engines is difficult because these engines are designed for vacuum conditions. At sea level, problems like flow separation can cause vibrations and heat damage. ISRO solved this using advanced technologies.
The CE20 engine has already undergone around 20 hot tests. It also demonstrated technologies like restart capability and indigenous components.
1.CE20 cryogenic engine is used in which launch vehicle?
A) PSLV
B) GSLV Mk II
C) LVM3
D) SSLV
Answer: C
2.CE20 engine uses which fuels?
A) Solid fuel
B) Liquid hydrogen and oxygen
C) Kerosene
D) Methane
Answer: B
3.The sea-level test of CE20 was conducted in:
A) Sriharikota
B) Mahendragiri
C) Bengaluru
D) Thiruvananthapuram
Answer: B
4.Main purpose of increasing thrust to 22 tonnes:
A) Reduce cost
B) Increase payload capacity
C) Improve satellite communication
D) Reduce fuel use
Answer: B
5.Nozzle Protection System is used to:
A) Increase speed
B) Avoid thermal damage
C) Reduce fuel
D) Improve communication
Answer: B
1. Cryogenic engines are mainly used in which stage of rockets?
Answer: Upper stage
2. Which Indian mission uses LVM3 rocket?
Answer: Gaganyaan
Students often confuse PSLV with LVM3.
PSLV is for lighter payloads, while LVM3 is heavy-lift with cryogenic engine.