Solid propulsion plays an important role in launch vehicle technology. The reliability, simplicity, easy scalability and high thrust capability of a solid propulsion system makes it a preferred solution for a launch vehicle.
For developing expertise in large Solid Rocket Motors, SPROB was established at Sriharikota and commissioned in 1977 with the realisation of a 1-metre diameter monolithic motor for SLV-3.
In the 1980s, the requirement of the operational Polar Satellite Launch Vehicle (PSLV) called for a major expansion of the scope and capacity of the facilities at SPROB. This necessitated a quantum shift in propellant formulation technology using the indigenously developed HTPB binder and vertical propellant mixers. Self-reliance in solid propellant production was achieved by the indigenous development and realisation of several specialised equipments.
For manufacturing the massive S200 solid rocket motors of GSLV MkIII vehicle, a new plant was built at SPROB. Decades of experience gained in the processing and operation of SPROB was utilised in the design and realisation of this world-class plant. Successful commissioning of this vast state-of-the-art facility in 2008 boosted the Indian space programme's complex missions such as Chandrayaan 2 and Gaganyaan-- India's human space programme.