"We’ve proven we can rapidly move from concept to engine demonstration with the GEK800," said Steve Russell, vice president and general manager of Edison Works at GE, as the company described its next step: completing a preliminary design review for a new powerplant labeled the GE426.
Two engine makers tapped for "Medium Thrust" autonomous platforms
The Air Force has selected GE Aerospace and Rolls‑Royce to advance engine designs intended for drones the service calls Medium Thrust Class Autonomous Collaborative Platforms, a service spokesperson told Breaking Defense. The awards were described by the Air Force as part of efforts to widen propulsion options for unmanned systems. The spokesperson said drones are the initial focus, though "other platforms with similar propulsion characteristics may benefit" from the resulting powerplants.
GE's contract: GE426, GEK800 pedigree, and contract structure
GE Aerospace said its contract will complete the preliminary design review for the GE426. GE framed the work as a continuation of a rapid-development approach it demonstrated with the GEK800 — "a smaller, lower‑thrust engine GE developed with Kratos for drone and cruise missile applications." According to the Air Force spokesperson, the GE426 award was issued as a firm‑fixed‑price deal using Other Transaction Authority under the service’s Propulsion Consortium Initiative 2.0 to "explore solutions beyond traditional manned aircraft standards." The Air Force did not disclose the dollar value of the GE award.
Rolls‑Royce: AE engine family, an unannounced award, and a Navy tie
Rolls‑Royce also was selected, but the company’s award "has not been publicly announced," the reporting notes. Candice Bineyard, director of business development and future programs for defense at Rolls‑Royce, told Breaking Defense the firm would leverage its "AE engine family" without specifying the exact powerplant under the new contract. The story cites the AE 3007N as an example from that family: it is "currently used on the Navy’s MQ‑25 Stingray, which made its first flight in April." The Air Force spokesperson did not immediately clarify whether Rolls‑Royce’s award used the same contracting approach as GE, and the service did not provide a dollar figure for the Rolls‑Royce work.
Where the engines might be used: drones, wingmen, and weapons
The Air Force framed the work as applicable to multiple unmanned concepts. Beyond drone applications, the service has issued a range of contracts for engines that could power unmanned platforms including drone wingmen — described in other program materials as Collaborative Combat Aircraft — as well as "other unmanned systems and weapons like cruise missiles." The second round of the Air Force’s Collaborative Combat Aircraft program is evaluating a broad spectrum of designs "spanning from cheaper to more exquisite concepts," the reporting states, indicating the service is balancing cost and capability in parallel development tracks.
What this means for the Air Force, GE/Rolls‑Royce, and House authorizers
- The Air Force and warfighters: The service is explicitly exploring propulsion options "beyond traditional manned aircraft standards" and is positioning medium‑thrust engines as enablers for persistent, distributed unmanned operations. The Air Force’s immediate aim is drones, but it is keeping other platform applications on the table.
- GE Aerospace and Rolls‑Royce: GE has committed to a defined preliminary design milestone for the GE426 and tied that work to prior rapid‑development experience with the GEK800. Rolls‑Royce is pitching established AE family attributes — performance, electrical power, and reliability — while the precise engine and contract structure remain undisclosed.
- House authorizers and policymakers: The reporting cites House authorizers who recently warned that future needs may include drones "with sufficient range, speed, and electrical power to potentially self‑deploy from the continental United States and conduct varied missions for geographic combatant commanders." Those requirements, the authorizers noted, would "likely entail more expensive, higher‑performance designs," signaling a potential shift in procurement expectations if such demands are adopted.
Concrete lines in the record are slim but specific: GE's contract will conclude a preliminary design review for the GE426 under an Other Transaction Authority instrument; Rolls‑Royce was selected and praised its AE engine family, but the firm’s award had not been publicly announced and the Air Force did not disclose dollar amounts or whether both awards share identical contract structures. The program context — multiple propulsion contracts, a second round of Collaborative Combat Aircraft evaluations, and congressional notes about future range and power requirements — frames the engine picks as early moves in a broader push to diversify and harden propulsion options for unmanned and expendable systems.
