India’s Geosynchronous Satellite Launch Vehicle, GSLV-Mark III project aimed at carrying four-tonne payloads, including future manned missions, has got a boost with ISRO successfully test-firing the first indigenous high-thrust cryogenic rocket engine for more than its full duration. ISRO yesterday confirmed that the test was conducted at its Propulsion Complex at Mahendragiri in southern Tamil Nadu for 800 seconds, which is 25 per cent more than the burn duration of the engine during flight. India has so far used six of the seven cryogenic engines procured from Russia and needs indigenous engines to fly GSLVs to propel its future space missions.