India's Space Research Organization has managed to develop a world class space program and a series of launch vehicles that have multiplied their payload capabilities by hundreds of times between the SLV-3 able to place 40kg into orbit to the GSLV MKIII which can place 10 tons into orbit.

Starting with the SLV in the late 1970's a and all the way up to the modern GSLV India has been heavily reliant on solid rocket motors to deliver their payloads, they've developed their own 200ton solid rocket motors, comparable to those used by the US and Arianespace.

India's main liquid fueled engine is the Vikas, derived from Europe's Viking, but evolved with greater capabilities. India also developed hydrolox engine technology on their own and have high performance upper stages on their GSLV rockets.

ISRO's Web site
https://www.isro.gov.in/

Lots of important information and imagery were compiled by Norbert Brugge's and you can find much more on his excellent site:
http://www.b14643.de/Spacerockets_1/I...

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