Published: 30 March 2026ISRO / Department of SpaceScience & Technology
ISRO Conducts Successful 165-Second Full-Power Test of CE20 Cryogenic Rocket Engine
AQuick answer
ISRO successfully conducted a 165-second full-power test of the CE20 cryogenic engine at Mahendragiri on March 10, 2026, a key milestone for the Gaganyaan crewed spaceflight programme.
Key facts
ISRO conducted a 165-second sea-level hot test of the CE20 cryogenic engine on March 10, 2026
Test held at ISRO Propulsion Complex (IPRC), Mahendragiri, Tamil Nadu
CE20 is the cryogenic upper stage engine for LVM3 (Launch Vehicle Mark-3) rocket
CE20 engine powers the C32 stage that will carry Gaganyaan astronauts to space
Gaganyaan mission aims to send 3-member crew to 400 km orbit for a 3-day mission
India will become the 4th nation after Russia, USA, and China to independently send humans to space
ISRO Conducts Landmark Test of CE20 Cryogenic Engine
The Indian Space Research Organisation (ISRO) successfully conducted a landmark 165-second full-power test of its powerful CE20 cryogenic rocket engine at sea level on March 10, 2026, at the ISRO Propulsion Complex in Mahendragiri, Tamil Nadu. This test is a major milestone in India's human spaceflight programme, particularly for the Gaganyaan mission.
Background
The CE20 engine is India's most powerful cryogenic upper stage engine, designed for the LVM3 (Launch Vehicle Mark-3) rocket
Cryogenic engines use liquid hydrogen and liquid oxygen as propellants, stored at extremely low temperatures
The CE20 engine powers the C32 cryogenic stage — the upper stage of LVM3
LVM3 is India's heaviest launch vehicle and the rocket that will carry Gaganyaan astronauts to space
Test Details
Duration: 165 seconds — a full-power test simulating actual flight conditions
Location: ISRO Propulsion Complex (IPRC), Mahendragiri, Tamil Nadu
Type: Sea-level test — verifying engine performance at atmospheric pressure before actual flight
The engine achieved full thrust throughout the test duration, demonstrating reliability and readiness
Significance
The successful test validates the CE20 engine's readiness for crewed spaceflight missions under the Gaganyaan programme
Cryogenic engine technology was historically denied to India, but ISRO developed it indigenously — a landmark achievement in self-reliance
This test directly supports the Gaganyaan uncrewed and crewed mission timelines
ISRO also signed an agreement with AIIMS New Delhi for Space Medicine and Research cooperation — highlighting the multidisciplinary nature of space preparation
About Gaganyaan
India's Gaganyaan programme aims to send a 3-member crew to orbit at 400 km altitude for a 3-day mission
It will make India the 4th nation after Russia, USA, and China to independently send humans to space
PYQPrelims/PYQ angle
RAS 2024 Critically evaluate the strategic and technological importance of indigenization in defence production, especially in missile and space technologies of India.
Mains angle
Q: Discuss the significance of the successful 165-second full-power test of ISRO's CE20 cryogenic engine for India's Gaganyaan human spaceflight programme.
Answer (50 words): On March 10, 2026, ISRO successfully tested the CE20 cryogenic engine for 165 seconds at full power at Mahendragiri, Tamil Nadu. Powering the LVM3 upper stage, this milestone validates engine reliability for the Gaganyaan human spaceflight programme, advances indigenous cryogenic capability once denied to India, and supports crewed mission readiness timelines.
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Linked questionMedium
Where did ISRO conduct the successful 165-second full-power test of the CE20 cryogenic engine on March 10, 2026?
Explanation · Correct answer B
ISRO conducted the 165-second sea-level hot test of the CE20 cryogenic engine at 22-tonne thrust at the ISRO Propulsion Complex, Mahendragiri. Mahendragiri is in Tamil Nadu, so option B is correct.
What was the ISRO CE20 cryogenic engine test conducted in March 2026?
**ISRO** successfully conducted a **165-second full-power hot test** of the **CE20 cryogenic engine** on **March 10, 2026**, at the **ISRO Propulsion Complex (IPRC) in Mahendragiri, Tamil Nadu**. This test validated the engine performance at full thrust, which is critical for the upcoming **Gaganyaan human spaceflight mission**.
What rocket does the CE20 cryogenic engine power?
The **CE20 cryogenic engine** powers the **C32 upper stage** of the **LVM3 (Launch Vehicle Mark-3)** rocket, formerly known as GSLV Mk III. This cryogenic upper stage will carry India **Gaganyaan mission crew** of three astronauts to a **400 km orbit** for a three-day mission, making it India first crewed spaceflight.
What is the Gaganyaan mission and what is its target orbit?
**Gaganyaan** is India first human spaceflight mission, aiming to send a **3-member crew** to a **400 km low-Earth orbit** for a **3-day mission** before returning safely. It is being developed by **ISRO** and upon success will make India the **4th country in the world** after **Russia, USA, and China** to independently send humans to space.
Where is the ISRO Propulsion Complex IPRC and what is its role?
The **ISRO Propulsion Complex (IPRC)** is located at **Mahendragiri, Tamil Nadu**. It serves as ISRO primary facility for **testing and qualification of rocket engines and propulsion systems**. The 165-second CE20 engine test conducted there on **March 13, 2026**, was a crucial milestone in the Gaganyaan programme engine qualification process.
Which countries have independently achieved human spaceflight before India Gaganyaan?
Only **three countries** — **Russia (Soviet Union), the United States, and China** — have independently sent humans to space. India **Gaganyaan mission**, once successful, will make India the **4th nation** to achieve this milestone independently. The CE20 engine successful full-power test in March 2026 is a key step toward this goal.
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