Indian Human Spaceflight Program (HSP)

gslv markIII

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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
1630169863536.png

Test Firing
 

sorcerer

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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

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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.
 

Indx TechStyle

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Gaganyaan: Isro readies for Crew Escape System test vehicle flights
Representative photo: PTI
The Indian Space Research Organisation (Isro) is preparing for multiple flights of the specially designed test vehicle that will be used to test the Crew Escape System (CES), which will be a crucial element of India’s first human space flight mission (Gaganyaan).
Being built at the Vikram Sarabhai Space Centre (VSSC), the vehicle is expected to be ready by the end of this year and Isro is planning at least one flight before the proposed uncrewed mission now scheduled for mid-2022.
VSSC director S. Somnath told TOI: “...The design work on CES is done and all the reviews have been completed. Most of the systems of the Test vehicle have been realised and the vehicle is in the integration phase and should be ready by the end of this year. The whole CES has to be tested a few times before we put it in the unmanned flight.”

Isro chairman K Sivan said the new vehicle will be used to ensure that there’s a flawless mechanism for crew escape, which is a very important aspect of Gaganyaan as it helps deal with any exigency during travel or stay of the astronauts.
As reported first by TOI last year, the vehicle is built for the in-flight escape of the crew. The propulsion will be on top of the crew module so that it is able to pull the crew away by lifting the module and take them to a safe place.
“We’re looking at at least one test vehicle mission before the uncrewed mission. The vehicle is meant for testing an abort. During the flight, we may need to abort at different stages, like high dynamic pressure, critical flight events, etc. The test vehicle will be used to test abortions up to the first stage of the flight. It won’t go to orbit,” Sivan explained.
Crew Module & GSLV-Mk3
Aside from the CES and the test vehicle, VSSC is responsible for the GSLV-Mk3 — the launch vehicle to be used for Gaganyaan — and some elements of the crew module.
“All design work on the launch vehicle is complete and we have begun testing. The L110 and C25 engines have completed first-level testing and further testing will continue. The S-200 solid booster is being prepared for static tests and we should be ready for that soon. Overall qualification work is going on. There’s a lot of activity: The entire electronics is being revised, we are adding higher levels of redundancies. Health management of the vehicle system design is complete. Prototyping and testing will begin soon,” Somnath said.
Sivan, while pointing out that VSSC is also responsible for the structural design of the crew module, said all the systems inside the module — avionics, control systems, computers, sensors, etc — and the service module will be built by the UR Rao Satellite Centre (URSAC), while multiple centers will contribute to the Environmental Control and Life Support System (ECLSS).
“For the ECLSS, which is a very important part of the crew module, LPSC (Liquid Propulsion Systems Centre) will have a major responsibility. They will build the pressure control system, while VSSC will build the thermal control system and SAC (Space Applications Centre) will develop the crew display, instrumentation etc,” Sivan said.
He added that the design phase of the crew module has been completed and that various centers have already begun fabrication of the systems.
 
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mokoman

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this is similar to one onboard international space station.

i dont think these are actually useful. they dont do any useful work.

still ,i guess these are future of space exploration , makes no sense to send people when u can send a bunch of these , no life support system needed , no food , water , and if ship crashes/explodes no worries.

 
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THESIS THORON

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kab hoga gaganyaan ??

and can we expect permanent (small space station like mir) by 2030 ??
 

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still ,i guess these are future of space exploration , makes no sense to send people when u can send a bunch of these , no life support system needed , no food , water , and if ship crashes/explodes no worries.
Sending humans is an actual show of technological capability than robots. Humans do need extensive care unlike machine.

After all in future, they will have to taken humans to settle.
 

pipebomb

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Does anyone know what is the maximum sustained acceleration of human rated gslv mkiii given that gslv mkiii first stage is solid, hence can't be modulated ? (Nasa has a requirement of max 3g limit on sustained acceleration)
 

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