ISRO completes three key tests of Gaganyaan crew module systems

The second test focused on the separation of the umbilical mechanism linking the crew module—where astronauts are accommodated—to the service module, which supplies power and propulsion.

This mechanism comprises two components: CSU-1 located on the crew module side and CSU-2 positioned on the service module side. As the crew module re-enters Earth’s atmosphere, the service module detaches after CSU-1 separates. Shortly before re-entry, CSU-2 is also disengaged.

ISRO conducted the separation test of CSU-2 using a simulated crew module. The results confirmed the clean detachment of CSU-2 and demonstrated the structural stability of the crew module panel and its interface connections.

The third test assessed the structural strength of the crew module during the separation of the apex cover. The apex cover shields the parachutes and related systems throughout the mission and is released prior to parachute deployment to ensure the crew module can descend safely.