Indian Human Spaceflight Program (HSP)

gslv markIII

Regular Member
Jan 17, 2016
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Successful hot Test of Gaganyaan Service Module Propulsion System – System Demonstration Model (SDM)

On August 28, 2021, ISRO successfully conducted the first hot test of the System Demonstration Model (SDM) of the Gaganyaan Service Module Propulsion System for a duration of 450 s at the test facility of ISRO Propulsion Complex (IPRC), Mahendragiri, Tamil Nadu. 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 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 5 nos. of 440 N thrust engines and 16 nos. of 100 N Reaction Control system (RCS) thrusters with MON-3 and MMH as Oxidizer and Fuel respectively. The System Demonstration Model (SDM), consisting of 5 nos. of 440 N engines and 8 nos. of 100 N thrusters, was realized to qualify the propulsion system performance in ground. A new test facility is established at IPRC, Mahendragiri for testing the SDM.

System Demonstration Model (SDM)

System Demonstration Model (SDM) at test bed

Test Firing


Senior Member
Apr 13, 2013
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Indian pilots to return to Russia soon for customised space suits
Dinakar Peri

5-6 minutes

In March this year, four Indian Air Force (IAF) officers who completed a year-long training in the Russian Space Academy as part of India’s Gaganyaan human space flight programme. They will soon return to Russia for getting their space suits made as per individual specifications.
“Having completed their training, they returned home… We also expect our astronauts to return to Russia for very specific tasks. The space suits are being stitched in Russia and they will be coming here to Moscow to undertake tailoring measurements,” Ambassador of India to Russia D.B. Venkatesh Varma told The Hindu. So this will be a happy occasion when we will see our astronauts back in Moscow though for a brief time, he stated.


Indx TechStyle

Kitty mod
Apr 29, 2015
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Thought we are making our own space suits
None of Indian private companies' suits were selected because of experience issue. Russians are most experienced in world in all aspects of human spaceflight; crew modules, space stations and life support systems etc..

Indian space suits will remain under R&D stage for a while.

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