Hot test to the SDM successfully tested
GS Paper - 3 (Space Technology)
As part of its preparations for the ambitious India’s first human spaceflight mission (Gaganyaan), the Indian Space Research Organisation (Isro) on 28 August 2021 said it successfully conducted a hot test of the system demonstration model (SDM) of the service module propulsion system.
- The first hot test of the SDM of the Gaganyaan Service Module Propulsion System (SMPS) was for duration of 450 seconds at Isro Propulsion Complex (IPRC) in Mahendragiri, Tamil Nadu.
- The system performance met the test objectives and there was a close match with the pre-test predictions.
- A series of hot tests are planned to simulate various mission conditions as well as off-nominal conditions in the coming months.
- The service module is part of the Gaganyaan Orbital module and is located below the crew module and remains connected to it until re-entry.
- The service propulsion system consists of a unified bi-propellant system consisting of five 440-N thrust engines and 16 100-N reaction control system (RCS) thrusters with MON-3 and MMH as Oxidizer and Fuel respectively.
- The SDM, consisting of five 440-N engines and eight 100-N thrusters, was realised (designed) to qualify the propulsion system performance in ground. A new test facility was established at IPRC, for testing the SDM.