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Advanced / Transformational Technology

New Frontier Aerospace Hot Fires 3D-Printed Rocket Engine

By Cal Biesecker

Monday, June 23rd, 2025

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New Frontier Aerospace Hot Fires 3D-Printed Rocket Engine

New Frontier Aerospace's Mjolnir 3D-printed, full-flow staged combustion engine. Photo: NFA

New Frontier Aerospace (NFA) on Monday said it has completed a series of successful hot fire tests of its additively manufactured Mjolnir liquid rocket engine the startup is developing for reusable rockets, hypersonic vehicles, and orbital transfer spacecraft. The liquid natural gas engine will power NFA’s Pathfinder hypersonic vertical takeoff and landing unmanned aircraft system that is slated for its first hovering flight-test in early 2026, the Kent, Wash.-based company said. Mjolnir will also be used to power the company’s…

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