Indian media are reporting that ISRO conducted a successful test firing of an indigenous cryogenic engine on Saturday, helping to pave the way for a test flight in September.
“The acceptance test of the indigenous cryogenic engine for the forthcoming GSLV-D5 flight was conducted successfully for 200 seconds at 5:10 pm….The performance of the engine was as predicted,” according to an ISRO statement quoted by Indian media.
The test comes more than two years after the first launch with an Indian-produced cryogenic upper stage failed. The engine failed to ignite and fell into the Bay of Bengal along with its payload.
Indian has been using Russian-provided cryogenic upper stages while developing its own version. The rocket technology is crucial for India’s goal of become self-sufficient in the launching of larger satellites aboard its GSLV rockets.



