Overview
- ISRO conducted the static firing on December 30 at the Solid Motor Static Test Facility at SDSC Sriharikota.
- A new carbon‑epoxy monolithic motor case cuts stage mass and raises SSLV payload capacity by about 90 kg.
- The upgraded SS3 adds an improved igniter and nozzle and uses fault‑tolerant electro‑mechanical nozzle actuation with low‑power control electronics.
- Around 233 measurements of pressure, thrust, temperature, vibration and actuator performance were recorded during the test and aligned with predicted values.
- India expanded solid‑motor capabilities in 2025 with a Sriharikota production line, a second ammonium perchlorate line at Alwaye and a 10‑tonne vertical mixer, and the SDSC facilities also built and tested a motor for a private orbital launcher.