Isro cryogenic engine ground test: 5 reasons why this matters

The Indian Space Research Organisation (Isro) on Monday successfully conducted the Flight Acceptance Test of the CE20 Cryogenic Engine for the next LVM3 mission. The test took place at the Isro Propulsion Complex, Mahendragiri, Tamil Nadu, according to a press release.

LVM3, formerly known as GSLV MkIII, is Isro's heaviest rocket and uses the indigenously made CE20 cryogenic engine to power its upper stage. The engine, which has successfully powered eight missions including Chandrayaan-2 and Chandrayaan-3, was tested at a thrust of 22 tonnes using a Nozzle Protection System (NPS) for the first time.

Here are five reasons why this test matters and is a major milestone in Indian space research:

1. Clears the engine for the next mission

The flight acceptance hot test of the CE20 engine was carried out with a thrust level of 22 tonnes using NPS in Mahendragiri. The engine operated with a thrust level of 19.5 tonnes for 45 seconds and 22 tonnes for 25 seconds.

More from India

The test results confirmed the satisfactory performance of the engine systems and NPS, clearing the engine to be further refurbished and assembled to the C32 flight stage before it is integrated into the LVM3-M7.

2. Strengthens India’s commercial launch capabilities

According to Isro, the CE20 engine has already powered three commercial missions before. After the successful test at 22-tonne thrust, Isro has enhanced the payload capacity of the LVM3, making it more competitive in the global commercial launch market.

This test would help attract more international clients looking for reliable and cost-effective launch services.

3. It Proves the Success of the Nozzle Protection System

This was the first time the CE20 engine was tested using NPS. It was developed and validated on a qualification engine with multiple tests. Implementation of NPS simplifies the complex activities associated with testing under High Altitude Test (HAT) conditions, requires fewer resources, and allows for longer test durations.

“Test results confirm the satisfactory performance of the engine systems & NPS,” the press release said.

4. Major step in the Indian Human Spaceflight Programme

Human-rating qualification requirements were accomplished on the CE20 engine for the Gaganyaan mission, which will be the first spacecraft of the Indian Human Spaceflight Programme.

This test confirms the engine’s ability to carry astronauts to space.

5. India’s Mastery over Elite Technology

The CE20 engine has now performed successfully in 8 successive LVM3 missions, including Chandrayaan-2, Chandrayaan-3, and three commercial missions. Cryogenic engines are among the most complex technologies in rocketry, and the United States once denied India access to them. As a result, Isro had to develop it independently, using indigenous technologies.

The success of these tests demonstrates India’s self-reliance and mastery of elite technology, access to which it was once denied.

The test has had a crucial impact on Indian space research. It clears the way for the next mission, highlighting the success of indigenously developed technologies such as NPS, and paves the way for India’s Gaganyaan mission. Most importantly, it reaffirms the country’s self-reliance through the success of indigenous technologies, despite having once been denied access to them.