The RTX business announced the milestone ahead of the Farnborough International Airshow, saying nearly 60% of the engine by volume now consists of 3D-printed parts. Faster engine production Unlike reusable aircraft engines that must remain in service for years, the TJ150 powers expendable systems that typically operate for only minutes or hours. Pratt & Whitney is also applying lessons from the TJ150 program to future propulsion projects, including its Valox engine family. The team also successfully tested a 3D-printed rotating turbine wheel before integrating it into the latest engine configuration. The engine already supports several missile applications, with Pratt & Whitney delivering more than 2,700 units to customers worldwide.