India's Astrobase Unveils Full-Flow Methane Rocket Engine Built With 3D Printing

A Private Indian Startup Just Revealed a SpaceX-Class Rocket Engine

Astrobase Space Technologies, a Chennai-based space startup, has publicly unveiled Everest: an 80-tonne-thrust full-flow staged-combustion (FFSC) liquid methane engine. Every core component of the engine is manufactured using large-scale metal 3D printing. That puts Astrobase in rarefied company. Only SpaceX has flown an FFSC engine commercially.

The unveiling came on August 7, 2026, alongside news that the company has established a 21.5-acre test site near Anantapur, Andhra Pradesh, designed to handle high-thrust cryogenic engine testing. The facility gives Astrobase its own dedicated hardware validation path rather than relying on government ranges.

Why Full-Flow Staged Combustion Matters

An FFSC engine sends propellant through both the main combustion chamber and the turbine driving the fuel pumps. The result is higher efficiency than open-cycle engines and better reusability characteristics. SpaceX's Raptor engine uses this cycle. So does Blue Origin's BE-4, though that engine has faced its own delays.

Everest targets 800 kilonewtons of thrust, roughly in the same class as Raptor's early iterations. The engine is designed for multiple flights: Astrobase says a single unit should be capable of more than 50 missions before requiring major refurbishment. That reusability target is central to the company's business model.

3D Printing Is the Enabler

Traditional rocket engine manufacturing requires hundreds of precision-machined parts, long lead times, and expensive tooling. Astrobase is producing complex cooling channels, injector heads, and combustion chamber liners using large-format metal 3D printing. The company received India's largest industrial 3D printer in March 2026, a machine so large it required four trucks to transport.

The 3D printing approach is not just about speed. Complex internal geometries, like the regenerative cooling channels that keep a rocket chamber from melting, are easier to produce as a single printed assembly than as a stack of machined parts. Fewer welds and joints means fewer potential failure points.

The Bigger Picture for India's Space Sector

India's government space agency ISRO has its own reusable launch vehicle ambitions, but the private sector is moving faster. AgniKul Cosmos, another Chennai startup, already launched a suborbital vehicle with a 3D-printed engine in 2024. Astrobase is now attempting something harder: a reusable first stage with an FFSC engine, a design challenge that has taken established aerospace companies years to solve.

The August 7 unveiling was a milestone, not a finish line. Hot-fire tests and flight qualification still lie ahead. But the technical ambition is clear. India's private space companies are no longer testing simple pressure-fed engines. They are building hardware that competes with the most advanced propulsion systems in the world.