ISRO completes key test, CE20 cryogenic engine is now human-rated for Gaganyaan missions

The Gaganyaan project envisages demonstration of human spaceflight capability by launching crew of three members to an orbit of 400 km for a 3-day mission, and bring them back safely to earth, by landing in Indian sea waters.

Indian Space Research Organisation (ISRO) has accomplished a major milestone in the human rating of its CE20 cryogenic engine, that powers the cryogenic stage of the human-rated LVM3 launch vehicle for Gaganyaan missions, with completion of the final round of ground qualification tests.

ISRO posted on X: “Mission Gaganyaan: ISRO’s CE20 cryogenic engine is now human-rated for Gaganyaan missions. Rigorous testing demonstrates the engine’s mettle. The CE20 engine identified for the first uncrewed flight LVM3 G1 also went through acceptance tests.”

Human-rating refers to rating a system that is capable of safely transporting humans.

The final test was carried out on February 13. It was the seventh in a series of vacuum ignition tests carried out at the High Altitude Test Facility at ISRO Propulsion Complex, Mahendragiri, to simulate flight conditions.

According to ISRO, the ground qualification tests for the human rating of the CE20 engine involved life demonstration tests, endurance tests, and performance assessment under nominal operating conditions as well as off-nominal conditions w.r.t thrust, mixture ratio, and propellant tank pressure. All the ground qualification tests of the CE20 engine for the Gaganyaan programme have been successfully completed.

In order to qualify the CE20 engine for human rating standards, four engines have undergone 39 hot firing tests under different operating conditions for a cumulative duration of 8,810 seconds against the minimum human rating qualification standard requirement of 6,350 seconds.

ISRO has also successfully completed the acceptance tests of the flight engine identified for the first unmanned Gaganyaan (G1) mission, tentatively scheduled for Q2 of 2024.