/startuppedia/media/media_files/2025/08/08/weeee-2025-08-08-18-33-44.png)
Agnikul Cosmos builds world’s largest single-piece 3D-printed rocket engine
Indian space startup Agnikul Cosmos has built the world’s largest single-piece 3D-printed rocket engine from Inconel, a high-performance superalloy known for its strength and heat resistance.
This breakthrough engine is about a meter long, entirely printed as one integrated component without any welds, joints, or fasteners from fuel entry to plume exit. Such an innovation hugely reduces manufacturing complexity, production time, and potential failure points.
Agnikul Cosmos shares 2 updates on social media
The startup shared two of its major updates on social media.
“Humbled to introduce the world’s biggest single-piece 3D-printed inconel engine, a global first in both scale & complexity,” read the first one.
The company’s second update read: “We have been granted a patent in the US for the design & manufacturing of single-piece rocket engines.”
“Means something to have a completely Indian-origin design patented in the US — a nation that has built some of the most complex engines in this industry,” the post read.
Two updates - A) Humbled to introduce the world’s biggest single-piece 3D-printed inconel engine, a global first in both scale & complexity. It is an meter long engine entirely printed as a single component in one shot. (No welds, no joints, no fasteners from fuel entry to plume… pic.twitter.com/V7o694coyK
— AgniKul Cosmos (@AgnikulCosmos) August 7, 2025
Anand Mahindra lauds Agnikul Cosmos
Mahindra Group Chairman Anand Mahindra, an investor in the startup, lauded the team, saying, “Bravo! And this makes me even prouder to be an investor.”
Notably, this comes with another major achievement - Agnikul’s successful test-firing of India’s first electric motor-driven semi-cryogenic rocket engine, which will power its forthcoming Agnibaan launch vehicle.
Liquid oxygen and refined kerosene are the propellants of the engine, replacing traditional gas generators and turbopumps with electric motors for precise thrust control, offering a cleaner, more controllable alternative.
Agnikul Cosmos is backed by bigshot Indian space agencies, including ISRO, IN-SPACe, the Department of Science and Technology (DST) and the Technology Development Board (TDB).