ISRO aborted semi-cryogenic engine test midway


Bengaluru: The Indian Space Research Organization (ISRO) has aborted the first ‘hot test’ on the ‘intermediate configuration’ of the semi-cryogenic engine after an unexpected increase in turbine pressure and subsequently reduced speed. A semi-cryogenic engine’s ‘intermediate configuration’ is also called the ‘power head test particle’ (PHTA).

The ISRO Propulsion Complex (IPRC) at Mahendragiri in Tamil Nadu has been awarded July 1 to develop a 2,000 kN (kilonewton) thrust semi-cryogenic engine to power the booster stages of future launch vehicles, the space agency said in a statement on Monday. The trial run was carried out on

According to ISRO, the objective of the test was to assess the integrated performance of critical sub-systems such as the gas generator, turbo pump, pre-burner, and control components through ‘hot-firing’ for a short duration of 4.5 seconds. It said the focus was on the ignition and generation of hot gas within the pre-burner chamber driving the main turbine, related to the operation of the fuel and oxidizer pumps.


“The test ran as expected until 1.9 seconds, with successful ignition and subsequent PHTA (Power Head Test Article) performance, but at 2.0 seconds, an unexpected increase in turbine pressure and subsequent turbine speed There was a shortage. The test was terminated as a precautionary measure. Its analysis will help provide more understanding before further ‘hot tests’ for the long term.