GE Aerospace wins Air Force contract for GE426 ACP drone engine

GE Aerospace (NYSE:GE) has been awarded a contract by the U.S. Air Force to conduct the preliminary design review (PDR) for its newly developed GE426 turbine engine, marking a significant step forward in the military's development of uncrewed autonomous combat aircraft.

The Cincinnati, Ohio-based propulsion giant engineered the GE426 to serve as a purpose-built power plant for the Air Force's medium-thrust class Autonomous Collaborative Platform (ACP) initiative.

Developed by the Air Force Research Laboratory, the ACP program focuses on fielding low-cost, high-performance uncrewed systems capable of operating as coordinated teams alongside traditional crewed fighter jets.

The new phase of the contract will mature the GE426 from a conceptual design into a physical prototype architecture.

Engineering teams will focus on refining the engine's core performance capabilities, scaling manufacturing blueprint options, and optimizing production economics to align with the military's strict budgetary and quantity requirements for its future autonomous drone fleets.

The contract framework builds directly upon a preceding milestone completed in August 2025, during which GE Aerospace successfully completed the engine's concept design review, validating its baseline architecture.

The agreement expands GE Aerospace's rapidly growing footprint in the defense sector's shift toward "affordable mass"—mass-producible, small-scale engines for expendable and autonomous aerial systems.

The company's small-engine military portfolio already features the GEK800 and GEK1500 propulsion systems, which are currently being co-developed in partnership with Kratos Defense & Security Solutions.

The specialized contract was formally executed via an Other Transaction Authority (OTA) Project Agreement managed by SOSSEC, under the Propulsion Consortium Initiative 2.0 framework, established between the Air Force Life Cycle Management Center and industry participants.