Launch Vehicles
L&T has been a trusted partner to ISRO for the supply of launch vehicle hardware and sub-systems, starting with the SLV programme in 1975. These include:
- More than 300 rocket motor casings for PSLV, GSLV and LVM3 programmes. These motor casings for the solid stages of PSLV, GSLV, LVM3 and SSLV made of maraging steel and 15CDV6 are now in serial production
- Light alloy interstage structures for PSLV, GSLV, LVM3 & SSLV
- Metallic and composites payload fairings for PSLV, GSLV Mk-II and LVM3
- Metallic and composite honeycomb deck panels for PSLV, GSLV Mk-II, LVM3 and Gaganyaan
- More than 70% of the Crew Escape System in Gaganyaan
- Last mile activities at SDSC SHAR
- System integration for launch vehicles
Satellite Subsystems
L&T has manufactured and supplied mission-critical hardware for Satellite Sub-Systems for over two decades. These include:
- Solar Array Deployment Mechanism (SADM)
- Reflector Array Deployment Mechanism (RDM)
- Propellant Titanium Gas Bottles
- Satellite Bus Structure
- Solar Panel Substrates
Navigation and Exploration Systems
32 m wheel-and-track antenna: A state-of-the-art structure installed by L&T at the Indian Deep Space Network (IDSN) at Byalalu, near Bengaluru to track and send commands to ISRO’s deep space missions. The antenna is a 32 m parabolic-shaped reflector fashioned from 180 stretch-formed panels. It has been designed and assembled to an overall accuracy of 0.3 mm RMS.
Precision Monopulse Tracking Radars (PMTR): Installed at Satish Dhawan Space Centre, Sriharikota (SDSC SHAR) and ISRO, Bengaluru, for fast acquisition and tracking of satellite launch and re-entry vehicles. Available in both C and S-band versions, these radars have been operational since 2009.
SATCOMM Infrastructure
GSAT-11, GSAT-20 & GSAT-29 Ground Systems:
L&T has been entrusted with the installation and commissioning of the complete Ground System Network comprising all gateway stations and related equipment for GSAT-11, GSAT-20 and GSAT-29.
The project includes system engineering, associated design and development, supply of hardware and software, installation, integration, commissioning and testing of the gateways.
Ground Testing Stations and Facilities
The critical aerodynamic test facilities built by L&T include:
Hypersonic Wind Tunnel
We have designed, developed and commissioned a one-meter Hypersonic Wind Tunnel, at the Vikram Sarabhai Space Centre - one of the largest in the world.
The mach number ranges from 6 to 12 mach with a runtime of 40 seconds. The number of blowdowns is over 1000.
Hypersonic Shock Tunnel
As part of the Hypersonic Wind Tunnel Project, a one-meter Shock Tunnel was set up by L&T at VSSC. It simulates High Enthalpy and Mach Number environment that an orbiter would experience during re-entry phase.
A salient feature of this project is the development of large speciality forgings fabricated for shock tunnels.
Engine Test facility
This is a high altitude test facility for liquid propulsion engines, supersonic and hypersonic aero-engines.
Thirty Meter Telescope
The TMT is being built under an international partnership between India, Canada, China, Japan and institutes from the USA - it is one of the most advanced large telescopes in the world.
L&T is the sole supplier of the “segment support assembly” required to hold and actuate the reflecting mirrors precisely.
Liquid / Semi Cryo Engine Subsystems
L&T is the development partner for critical sub-assemblies like Main Turbo Pump and Mixing Head Assembly in Semi Cryo engine SCE-200.
Fabrication of these sub-assemblies involves Super Nickel alloy machining and fabrication, critical technologies like vacuum brazing, multistage forming, CNC contour milling and multiple qualification testing like water flow test, hydro and pneumatic strength test.