Astrobase signs ₹800 crore deal to expand Andhra Pradesh rocket test facility

In a major milestone for India's privatized space sector, Bengaluru-headquartered aerospace startup Astrobase Space Technologies signed a Memorandum of Understanding (MoU) with the Andhra Pradesh Economic Development Board (APEDB) on November 12, 2026, to execute an ₹800 crore expansion of its rocket testing facility at Thimmasamudram in the Sri Sathya Sai district of Andhra Pradesh. Executed during the 31st Confederation of Indian Industry (CII) Partnership Summit in Visakhapatnam, the agreement clears the path to add 339 acres of dedicated land to the company's existing 22-acre site, expanding the total footprint to approximately 360 acres.

Founded in 2024 by former Indian Space Research Organisation (ISRO) scientist Devakumar Thammisetty and technology entrepreneur Neeraj Khandelwal, Astrobase is building integrated propulsion and launch vehicle infrastructure aimed at low-cost, high-frequency orbital access. The expanded Sri Sathya Sai facility will serve as the primary testbed for static hot-fire engine runs, multi-engine stage qualification, stage-level hop tests, and reusable launch vehicle (RLV) recovery validation. According to company executives, the project is projected to generate roughly 500 direct technical jobs and nearly 1,000 indirect employment opportunities across regional supply chains.

Technical Architecture of High-Thrust Propulsion Test Infrastructure

Static hot-fire testing represents one of the most demanding engineering challenges in rocket development. During full-duration engine burns, propulsion test stands must manage extreme thermal fluxes exceeding 3,000°C alongside massive structural acoustic vibratory loads and dynamic mechanical thrust forces measuring hundreds of metric tons. To accommodate these operational conditions, the physical test infrastructure requires specialized civil, mechanical, and fluid handling engineering.

The core structural design of a high-thrust rocket test stand relies on heavy reinforced concrete foundations anchored into deep bedrock to withstand vertical up-thrust and horizontal shear force vectors. Embedded within these concrete structures are high-capacity load cell arrays capable of measuring multi-axis forces and moments with sub-percent accuracy. To protect structural integrity during prolonged engine firings, flame deflectors lined with heat-resistant materials and forced-water deluge cooling systems are deployed to dissipate acoustic energy and direct supersonic high-temperature exhaust plumes away from critical monitoring equipment.

Beyond structural anchorage, fluid handling architectures form the lifeblood of hot-fire test operations. Liquid propulsion systems require ultra-clean, high-flow rate fuel and oxidizer supply lines operating under high pressure. Fluid systems must incorporate rapid-acting, zero-leak cryogenic and hypergolic isolation valves, automated pressure-regulating manifolds, and inert gas purge channels to prevent premature propellant mixing or backfire contamination. Test benches must also maintain tight closed-loop feedback controls for propellant conditioning, chill-down cycles, and precise mass flow rate measurements prior to ignition.

The expansion at Thimmasamudram will support full-scale qualification of Astrobase's proprietary Everest engine, an advanced liquid rocket engine designed to power the company's planned AB220 medium-lift launch vehicle. Conducting full-duration static firings on home ground allows engine developers to capture high-frequency sensor data spanning thousands of parameters—including turbopump vibration signatures, combustion chamber pressure stability, thermal stress gradients, and injector faceplate dynamics—without incurring the logistical constraints and scheduling friction associated with shared public facilities.

Capabilities for Reusable Launch Vehicle and Hop-Test Validation

A central objective of the 360-acre facility expansion is enabling stage-level "hop" tests, a critical milestone in mastering vertical takeoff and vertical landing (VTVL) architectures for reusable rockets. Hop tests involve launching an uncrewed rocket stage to low altitudes before executing controlled deceleration, hover maneuvers, and precise vertical touchdown on a designated landing pad. This regime validates retro-propulsion reignition, real-time aerodynamic control, dynamic throttling, and touchdown shock absorption mechanisms.

Executing VTVL testing demands an extensive spatial buffer and specialized ground support systems. A 360-acre footprint provides the physical separation required to ensure safe operational zones, accommodating emergency propellant dump systems, blast protection barriers, and multi-angle optical and telemetry tracking stations. The facility will feature reinforced landing pads fitted with grid-fin capture hardware, laser altimetry alignment markers, and automated fire suppression apparatus to handle landing events under varied wind and environmental conditions.

From an electronics and control perspective, hop tests validate the guidance, navigation, and control (GNC) software algorithms under actual atmospheric turbulence and real-world sensor noise. Engineers must verify that high-speed actuators controlling thrust vector control (TVC) gimbals can respond within milliseconds to dynamic mass shifts as propellant is consumed during flight. By conducting iterative hop tests on a dedicated private range, developers can rapidly mature control loops and fail-safe safety protocols required for suborbital and orbital stage recovery.

Integration with End-to-End Aerospace Manufacturing Ecosystems

The Andhra Pradesh test site expansion forms part of a broader dual-state manufacturing and testing strategy. Astrobase previously unveiled plans for a ₹500 crore manufacturing and assembly facility spanning 10 acres in Bengaluru, Karnataka. This sister facility will house advanced metal additive manufacturing (3D printing) equipment, precision computer numerical control (CNC) machining centers, automated cleanroom integration bays, and non-destructive testing (NDT) suites including industrial X-ray computed tomography and ultrasonic inspection units.

Under this integrated production matrix, sub-assemblies such as additive-manufactured combustion chambers, regenerative cooling jackets, and high-pressure turbopump impellers will be fabricated and non-destructively inspected in Bengaluru before being transported to the Thimmasamudram site for hydrostatic pressure proofing, cold-flow calibration, and hot-fire qualification testing. This closed-loop pipeline minimizes transport latency and streamlines failure analysis when engineering modifications are required.

The establishment of large-scale rocket testing infrastructure in Sri Sathya Sai district also accelerates local aerospace component indigenization. Private space transportation relies heavily on a tier-two and tier-three vendor base capable of supplying high-specification hardware, including stainless steel and titanium pressure vessels, cryogenic flexible hoses, high-pressure tubing, custom hydraulic power packs, and specialized sensor harnesses. Establishing a dedicated propulsion hub encourages local precision engineering firms to upgrade quality management systems to international aerospace standards such as AS9100.

Strategic Imperatives for India's Expanding Commercial Space Sector

The expansion of private rocket testing infrastructure directly reflects the ongoing transformation of India's space ecosystem. Following policy reforms introduced under the Indian National Space Promotion and Authorisation Centre (IN-SPACe) framework, private launch service providers are transitioning from initial design studies and sub-scale prototype demonstrations to full-scale commercial system development. Access to dedicated, high-capacity test sites is essential if private entities are to achieve high launch cadences and compete effectively in the global small and medium satellite launch market.

Globally, commercial launch economics are increasingly dictated by reusability and rapid launch turnaround times. Achieving these operational goals requires ground test facilities that can perform rapid automated system flushes, structural integrity inspections, and multi-engine static firings between test cycles. Developing private test ranges capable of handling high-thrust engines and vertical landing validation positions India as a comprehensive space transportation hub, offering end-to-end capabilities from component fabrication to orbital delivery.

Furthermore, building robust ground-based test infrastructure serves as the primary safeguard against flight failures. In liquid propulsion systems, minor fluid instabilities, seal leakages, or structural resonance can lead to catastrophic hardware loss in flight. Comprehensive ground testing on instrumented test benches allows engineers to expose components to extreme pressure spikes, thermal shocks, and mechanical vibrations, ensuring all system anomalies are identified and resolved before flight hardware leaves the launch pad.

As private aerospace ventures scale up high-pressure fluid testing, cryogenic fuel handling, and automated propulsion diagnostics, robust ground test infrastructure remains the foundation of flight readiness. Neometrix Defence Limited designs and manufactures advanced automated test benches, high-pressure gas distribution systems, cryogenic test rigs, and custom hydraulic power packs that empower India's aerospace, defence, and high-technology sectors to validate mission-critical equipment with absolute precision and safety.