Agnikul Tests Agnite — The Rocket Engine That Can Be 3D Printed in Just 7 Days

Indian spacetech startup Agnikul Cosmos has achieved a significant breakthrough in rocket engine manufacturing by successfully testing Agnite — a booster engine that can be fully 3D printed in just seven days at one-tenth the cost of conventional manufacturing.

A Single Piece, Fully 3D Printed Engine

The 1-metre long Agnite engine is 3D printed from Inconel as a single piece, eliminating the need for welds, joints, or fasteners that typically complicate rocket engine manufacturing. Built at Agnikul's facility at IIT Madras Research Park in Chennai, it represents India's largest single-piece Inconel rocket engine and the first of its scale to be tested with an electric pump architecture.

Because the engine prints as one continuous piece, it bypasses the machining, welding, and multi-component assembly that makes conventional engine manufacturing so time-consuming, explained the company.

Electric Pump Architecture

Agnikul chose electric motor-driven pumps over traditional gas generators. This decision brings practical benefits: fewer moving parts mean less refurbishment between flights, aligning with the company's reusability roadmap. The electric pump system also simplifies maintenance and reduces the complexity of each flight cycle.

The company holds a US patent for this integrated engine design, which runs from fuel inlet to exhaust without any traditional assembly points.

Building on Recent Successes

This test follows two other propulsion milestones in quick succession. Last month, Agnikul successfully fired three semi-cryogenic engines simultaneously in synchronisation — the first such test conducted in India. Both builds on the foundation laid by the Agnibaan SOrTeD mission in 2024, India's first controlled flight from a private launch pad at Sriharikota.

Growing Recognition

According to Business Standard, Agnikul is valued at over $500 million, drawing investment from HDFC Bank, Advenza Global Limited, and the Artha Select Fund. The Tamil Nadu government's industrial development arm (TIDCO) also invested Rs 25 crore under the TIDCO Startup Investment Policy 2025.

Beyond propulsion, Agnikul operates its own mission control, ground stations, and manufacturing facility, with patents in Europe and India covering propulsion systems, convertible upper-stage architecture, and orbital platform technologies.