ISRO has now successfully tested the enhanced version of the third stage of their Small Satellite Launch Vehicle (SSLV) and has reached a major milestone in achieving more effective launches for their small satellites. This test took place on 30th December 2025 at Satish Dhawan Space Centre in Sriharikota.
The third stage is named SS3. It is an extremely crucial one as it imparts the satellite with high speed so that it enters space. While conducting the test, ISRO was testing the new form of this third stage that utilizes new materials that are stronger yet lighter. The new version will be able to increase the overall rocket payload capacity by 90kg.
The SSLV has three stages, all of which consist of solid fuel. It has been designed in such a way that it gets launched very fast, compared to any other bigger rocket, which makes it ideal for launching satellites. It is designed for quick, low-cost launches and can be built and launched faster than larger rockets. This makes it useful for launching small satellites.
The improved SS3 uses a new carbon-epoxy motor case, along with a better igniter and nozzle. These changes make the stage stronger and more efficient. During the 108-second test, about 233 measurements were taken, including pressure, thrust, and temperature. All results matched expected values.
With this success, the improved SS3 is now ready for use in future flights. The test also supports ISRO’s larger goal of increasing solid motor production and strengthening India’s growing space industry.
