ISRO Successfully Conducts First Hot Test Of System Demonstration Model Of Gaganyaan Service Module Propulsion System

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The Indian Space Research Organisation (ISRO) on Saturday (28 August) successfully conducted the first hot test of the System Demonstration Model (SDM) of the Gaganyaan Service Module Propulsion System for a duration of 450 second at the test facility of ISRO Propulsion Complex (IPRC), Mahendragiri, Tamil Nadu, the space agency said in a statement.

According to the ISRO's statement, the system performance met the test objectives and there was a close match with the pre-test predictions.

Further, a series of hot tests are planned to simulate various mission conditions as well as off-nominal conditions, the space agency said.

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 Module (SM) Propulsion System consists of a unified bipropellant system consisting of five 440 Newton (N) thrust engines and sixteen 100 N Reaction Control system (RCS) thrusters with MON-3 and MMH as Oxidizer and Fuel respectively.

The System Demonstration Model (SDM), consisting of five 440 N engines and eight 100 N thrusters, was realized to qualify the propulsion system performance in ground.

ISRO added that it has established a new test facility at IPRC, Mahendragiri for testing the SDM.

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