Pratt Whitney Completes 3D-Printed TJ150 Turbojet Demo Test

Pratt & Whitney has successfully completed demonstration testing of an additively manufactured TJ150 turbojet engine, a process that consolidated more than 50 individual hot section components into a small number of 3D-printed parts.

The RTX Corporation subsidiary announced the milestone on July 20, 2026, during the Farnborough International Airshow in London. The test results validate the manufacturer’s strategy to use additive manufacturing to simplify design and accelerate production for expendable military propulsion systems.

Consolidating hot section components

According to the press release, nearly 60 percent of the TJ150 engine’s volume was produced using additive manufacturing. This volume includes major static and rotating hardware. By utilizing 3D printing technologies, engineers reduced the complexity of the engine’s hot section and replaced over 50 traditional parts with a handful of consolidated components.

The TJ150 is a 150-pound thrust class turbojet designed for single-use applications.

“For expendable engines like the TJ150, where missions can last minutes or hours, simplifying the design and scaling production quickly is essential to meeting rising demand,” said Jill Albertelli, President of Military Engines at Pratt & Whitney.

Integration with cruise missiles and decoys

The successful demonstration of the 3D-printed TJ150 follows recent contract awards and integration announcements for the engine platform. On March 10, 2026, Pratt & Whitney secured a follow-on contract from Leidos Dynetics to supply TJ150 engines for the AGM-190A small cruise missile.

In a separate announcement on July 15, 2026, Raytheon confirmed plans to prioritize the TJ150 engine for the initial production of the Miniature Air-Launched Decoy (MALD). Raytheon noted that utilizing the existing engine platform keeps restart timelines short while the company explores additively manufactured engines for longer-term opportunities.

Expanding additive manufacturing applications

Pratt & Whitney plans to apply the manufacturing techniques validated during the TJ150 demonstration to other propulsion programs. Albertelli stated that additive manufacturing helps the company move designs from concept to capability faster. She confirmed that the manufacturer is leveraging the TJ150 learnings to benefit other systems, including the Pratt & Whitney Valox engine family.

AirPro News analysis

The successful test of a heavily 3D-printed TJ150 highlights a critical shift in defense aerospace manufacturing. As military operators demand higher volumes of autonomous systems, decoys, and tactical missiles, traditional supply chains for small turbine engines face significant bottlenecks. Casting and machining conventional hot-section components requires extensive tooling and long lead times. By consolidating dozens of parts into a few additively manufactured pieces, we see manufacturers directly addressing the need for rapid scalability.

Expendable engines operate for very short durations, meaning they do not require the same long-term durability as commercial or manned military turbofans. This specific operational profile makes them ideal candidates for additive manufacturing, allowing producers to prioritize production speed and cost reduction over thousands of hours of time-on-wing reliability.

Sources: RTX / Pratt & Whitney (July 20, 2026)