Amit Paranjape’s Blog

ISRO’s GSLV D3 Mission – A Failure? Or A Stepping Stone?

Posted in Science & Technology by Amit Paranjape on April 15, 2010


Lift-Off of GSLV-F04 (image credit: Wikipedia)

It’s a sad coincidence that today’s failure of ISRO’s GSLV D3 Mission happened virtually on the exact day, 40 years on, since Apollo 13! Post the safe splash-down return of Jim Lovell and crew in the Pacific Ocean, many dubbed Apollo 13 as NASA’s most successful failure. How will this first test flight of the ISRO’s indigenously developed cryogenic engine be viewed? Only time will tell.

Space missions are fraught with risks and failures. ISRO has had a reasonably good track record, especially if you compare it with the early days of the USA and USSR Space Programs. And ISRO has been able to achieve success on a literal shoe-string budget as compared to what the other space leaders have spent.

What is the big deal with the Cryogenic Engine? A Cryogenic Engine uses a liquid propellant (typically liquid hydrogen) that is stored at a very low temperature (below –200 C). The other engines that have been used in ISRO’s rockets (including the first two stages of today’s mission) are solid fuel propellant based. Cryogenic Engines deliver a longer duration and more powerful thrust, per unit weight of propellant. They can also be controlled more effectively as compared to solid fuel propellant engines. Hence Cryogenic Engines are critical, as the range and weight capabilities of space missions increase. GSLV rocket has been designed to put heavy payloads (communication satellites, etc.) into a ‘Geo-Synchronous’ orbit (36,000 km orbit around the from earth). It will also provide a basis for future ISRO Missions to the Moon and beyond.

A little after 4:30pm, Indian Standard Time, a huge cloud of gloom descended upon ISRO. The first two stages had performed per expectations. However the 3rd stage powered by the cryogenic engine failed and the flight deviated from its desired path. One look at the scientists faces on TV, said it all. The emotions were there to be seen. It is these emotions that highlight the passion of these scientists, in their quest for building a great space program. In the present age of every-hyped entertainment and sports heroes, it it these real heroes that we all need to be proud of.

I am confident that ISRO will bounce back successfully from today’s failure, with the 2nd test flight due later this year. The data and results will be analyzed and corrective actions taken. Let’s not forget the spectacular success of the recent Chandrayaan Mission!


GSLV Mission / ISRO – Some Useful Links

ISRO (Indian Space Research Organization)


Official Press Release from ISRO about the GSLV D3 Mission

Cryogenic  Rocket Engine

ISRO Wikipedia Entry

ISRO Chandrayaan Mission


%d bloggers like this: