Science & Technology

ISRO Clears CE20 Cryogenic Engine for the LVM3-M7 Mission After Flight Acceptance Test

By TestNeeti Editorial TeamPublished Friday, 10 July 2026 2 min readSource: GKTodayArticle 5 of 13

The Indian Space Research Organisation (ISRO) conducted a flight acceptance hot test of the CE20 cryogenic engine on 6 July 2026 at the ISRO Propulsion Complex in Mahendragiri, Tamil Nadu, clearing it for the upper stage of the LVM3-M7, the launch vehicle's seventh operational mission. During the test, the engine ran at 19.5 tonnes of thrust for 45 seconds and then at its maximum rated thrust of 22 tonnes for 25 seconds. ISRO used a newly developed Nozzle Protection System for the first time in a flight acceptance test to support testing under high-altitude conditions. The tested engine will be integrated with the C32 cryogenic stage for LVM3-M7 after refurbishment.

Key Facts & Details

9 points

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ISRO conducted a flight acceptance hot test of the CE20 cryogenic engine on 6 July 2026 at the ISRO Propulsion Complex, Mahendragiri, Tamil Nadu.
2
The engine powers the upper stage of the LVM3 launch vehicle for its seventh operational mission, LVM3-M7.
3
During the test, the engine ran at 19.5 tonnes of thrust for 45 seconds, then at its maximum rated 22 tonnes for 25 seconds.
4
A newly developed Nozzle Protection System was used for the first time in a flight acceptance test to enable high-altitude testing.
5
The tested engine will be integrated with the C32 cryogenic stage for LVM3-M7 after refurbishment.
6
The CE20 has already flown in eight consecutive LVM3 missions, including Chandrayaan-2 and Chandrayaan-3.

Deep Dive

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A cryogenic engine uses propellants stored at very low temperatures, forming part of India's heavy-lift launch system.
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The CE20 has met human-rating qualification requirements for India's Gaganyaan human spaceflight programme.
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The eight prior LVM3 flights of the CE20 include three commercial launches alongside the lunar missions.

Exam Focus

For which mission was ISRO's CE20 cryogenic engine cleared, and where was the flight acceptance test conducted?

Exam Relevance & Angle

ISRO launch-vehicle developments are high-frequency science and technology GA items. The CE20 engine, the LVM3-M7 mission, the Mahendragiri test facility and the engine's Gaganyaan human-rating are exactly the named tokens examiners build questions around.

Target Exams

SBI POIBPS POSSC CGLRRB NTPCUPSC CSEState PCS

Background & Context

The LVM3 (Launch Vehicle Mark-3) is ISRO's heavy-lift launch vehicle, used for major missions including Chandrayaan-2, Chandrayaan-3 and commercial satellite launches. Its cryogenic upper stage is powered by the indigenously developed CE20 engine, which burns propellants—liquid hydrogen and liquid oxygen—stored at extremely low (cryogenic) temperatures to deliver high efficiency for orbital insertion. Cryogenic technology is complex and mastered by only a handful of nations. Flight acceptance tests validate each engine before it is committed to a specific mission. The ISRO Propulsion Complex (IPRC) at Mahendragiri, Tamil Nadu, is the agency's principal facility for assembling and testing liquid and cryogenic propulsion systems, and the CE20's human-rating supports the crewed Gaganyaan programme.