ISRO successfully tests indigenously developed Cryogenic Upper Stage engine for GSLV Mark III
स्रोत: News Bharati English      तारीख: 18-Feb-2017

Chennai, Saturday 18: Indian Space Research Organisation (ISRO) has successfully ground tested its indigenously developed Cryogenic Upper Stage engine for GSLV Mark III at its Liquid Propulsion Complex at Mahendragiri in Tirunelveli district of Tamil Nadu on Friday.
The C25 stage is the most powerful upper stage developed by ISRO and uses Liquid Oxygen and Liquid Hydrogen propellant combination. The development of C25 cryogenic stage will provide ISRO capability to launch four-ton class satellites four-tonynchronous Transfer Orbit.

ISRO Chairman AS Kiran Kumar said the full duration flight test of the cryogenic upper stage for GSLV Mark III was successful. He said that the test was last in the series before going for an actual rocket launch. The engine will be put into use in April.

Notably, the Geosynchronous Satellite Launch Vehicle was primarily developed to launch INSAT class of satellites into Geosynchronous Transfer Orbits. GSLV is being used for launching GSAT series of satellites. GSLV is a three-stage launcher that uses one solid rocket motor stage, one Earth-storable liquid stage and one cryogenic stage.

The most recent flight of GSLV, the GSLV-D5, placed GSAT-14 into its planned orbit and marked the first successful flight of the indigenous cryogenic stage. Earlier, GSLV had launched various communication satellites among which EDUSAT is notable, being India's first satellite built exclusively to serve the educational sector through satellite based distance education.