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Cryogenic stage: ISRO achieves significant milestone

BANGALORE: The Indian Space Research Organisation (ISRO) has achieved a significant milestone by successfully testing the indigenously developed cryogenic stage that will be employed as the upper stage of the Geosynchronous Satellite Launch Vehicle (GSLV).

An ISRO release said the test was conducted for its full flight duration of 720 seconds on Thursday at the liquid propulsion test facility at Mahendragiri in Tamil Nadu. With this test, the indigenous cryogenic upper stage has been fully qualified on the ground. The flight stage is getting ready for use in the next mission of GSLV (GSLV-D3) in 2008.

The ground test for 480 seconds of the complete stage was conducted on August 4, 2007. The release said the cryogenic upper stage was powered by a regeneratively cooled cryogenic engine, which works on staged combustion cycle, developing a thrust of 69.5 kN in vacuum.

It is a fantastic achievement. It has boosted the confidence of the ISRO,” said its Chairman G. Madhavan Nair in Thiruvananthapuram reacting to the ‘completely successful’ test of the indigenously developed cryogenic stage.

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