Ground static test of PSLV third stage

Why in News?

The Indian Space Research Organisation (ISRO) successfully conducted a ground static test of the Polar Satellite Launch Vehicle’s (PSLV) third stage (PS3) at Sriharikota.

Key Highlights

• The test was carried out following comprehensive configuration revisions prompted by anomalies observed in the third stage during previous missions (PSLV-C61/EOS-09 and PSLV-C62/EOS-N1).
• ISRO thoroughly revisited the PS3 solid motor’s configuration, focusing on design margins, raw material acceptance criteria, and assembly procedures.
• Key Technical Upgrades
  • Nozzle & Interfaces - Upgrades to the nozzle configuration to boost design margins.
  • Sealing Redundancy - Mechanical interfaces were strengthened with added redundancy in sealing systems.
  • Quality Controls - Updated non-destructive tests (NDT) and manufacturing procedures implemented throughout integration and transportation.
• Next Steps - ISRO will conduct detailed analysis and reviews of the test data collected from the static firing before clearing the vehicle variants for upcoming operational flights.

• Anatomy of the PSLV (Four-Stage Architecture)
  • Stage 1 (PS1) - Solid propellant motor (S139) with strap-on boosters.
  • Stage 2 (PS2)- Earth-storable liquid rocket engine (Vikas engine).
  • Stage 3 (PS3)- Solid propellant motor (the stage recently re-tested and modified).
  • Stage 4 (PS4)-Dual Earth-storable liquid engines.

Reference

The Hindu | PSLV third stage