Isro completes key propulsion system development for Gaganyaan

BENGALURU: Isro has efficiently accomplished the development of the Service Module Propulsion System (SMPS) for the Gaganyaan human spaceflight mission, marking a milestone within the programme’s progress. The qualification check programme concluded with a full-duration sizzling check of the SMPS that lasted 350 seconds. “The test, conducted on July 11, validated the propulsion system’s integrated performance for an off-nominal mission profile involving a service module-based mission abort. The system performed normally, as predicted,” Isro mentioned.The service module of Gaganyaan is a regulated bi-propellant propulsion system. It permits orbit circularisation, on-orbit management, de-boost manoeuvres, and offers abort functionality throughout ascent. “The main propulsive force comes from the Liquid Apogee Motor (LAM) engines, while Reaction Control System (RCS) thrusters ensure accurate attitude control,” Isro mentioned.To help testing, Isro developed a System Demonstration Model (SDM) replicating the fluid circuit of the SMPS, together with propellant feed, helium pressurisation, flight-qualified thrusters, and management parts. This testbed underwent 25 checks underneath each regular and off-nominal situations, totalling 14,331 seconds, to satisfy numerous mission and human-rating necessities.The SMPS was developed by the Liquid Propulsion Systems Centre (LPSC), and all checks have been carried out on the Isro Propulsion Complex in Mahendragiri.