ISRO Propulsion Complex
ISRO Propulsion Complex
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ISRO Propulsion Complex

The ISRO Propulsion Complex (IPRC), located at Mahendragiri in Tamil Nadu, is an ISRO centre involved in testing, assembling, and integrating propulsion systems and stages that are developed at ISRO's Liquid Propulsion Systems Centres (LPSC). Formerly, IPRC was known as LPSC, Mahendragiri, functioning under LPSC. It was elevated as an independent centre and renamed as IPRC with effect from 1 February 2014.

The complex is situated near Panagudi in Tirunelveli District, Tamil Nadu.

It is one of the ISRO centres that could be called as the "Jet Propulsion Laboratory of India" as all liquid, cryogenic and semicryogenic stage and engine related tests of ISRO's launch vehicles and satellites are carried out here.

Following activities are currently carried out at IPRC:

The Principle Test Stand is the oldest facility at IPRC Mahendragiri and was designed to test the Vikas Engine and other hypergolic engines. It consists of two sections, one for engine testing and the other for full stage integrated tests, ensuring accurate evaluation of various performance characteristics and seamless integration of critical components.

The CMEST was set up for testing ISRO's cryogenic engines, specifically the CE-7.5 and CE-20.

The Semi-cryogenic Integrated Engine Test Complex (SIET) is a facility handling large flow of propellants. It is 51 metres tall and has 30 metres flame deflector depth. It was originally designed for testing the SCE-200 Semi-Cryogenic kerolox engine. This engine is a crucial component of the LVM3 launch vehicle future upgrade, replacing the pair of Vikas engines on its first stage. The SIET was constructed with the aim of conducting tests on the SCE-200 engine, and it was completed by the end of 2022. As part of three space infrastructure projects totaling 1,800 crore, Prime Minister Narendra Modi formally inaugurated SIET from the Vikram Sarabhai Space Centre (VSSC) on 27 February 2024. Tests of locally produced engines and its essential subsystems, such as gas generators and turbo pumps, will be conducted at the new testing facility.

The facility consists of a visitors center, which is connected to the Test Control Center (TCC), allowing visitors to observe and learn about the testing procedures. The TCC is a critical element of the complex as it enables engineers and technicians to monitor the tests and make real-time adjustments to ensure their success. This facility has in-house control and data collecting systems and is capable of testing engines with thrusts up to 2,600 kN.

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