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China has flight-tested a hybrid propulsion system designed to make small battlefield drones quieter, harder to detect, and capable of flying longer distances, according to a report broadcast on Friday by CCTV-7, China's military television channel.
The 60-kilowatt system, which was tested in December, combines fuel-powered and electric propulsion to address a longstanding tradeoff in drone design. Fuel-powered systems used in larger uncrewed aircraft deliver strong performance and long endurance but produce considerable noise and heat. Smaller battery-powered drones are quieter and less visible on infrared sensors but suffer from limited flight time
How the System Works
The hybrid unit generates electricity from fuel during flight, then allows the drone to switch to a quiet electric mode when stealth is required, according to the South China Morning Post, which first reported the CCTV-7 broadcast. This dual-mode capability would enable small drones to cover longer distances while maintaining low noise levels and reduced thermal signatures — qualities that could make them harder to detect and intercept on the battlefield.
The system was developed by Sichuan Tianfu Light Power Technology, a state-backed firm that also unveiled the hybrid power unit alongside two turbofan engines at a low-altitude economy industry conference in late 2024. The company, which operates under the umbrella of China's Aero Engine Corporation, has been working to bring both the hybrid system and a larger 600-kilogram-force turbofan engine to commercialization.
A Broader Drone Buildup
The hybrid propulsion test is one element in a sweeping Chinese effort to expand unmanned aerial capabilities. In February, China flew the CH-YH1000S, described as the world's first hybrid cargo drone, in Chongqing — a project that drew on a partnership between the aerospace sector and the country's electric vehicle industry. In December, the CH-7 stealth endurance drone completed its maiden flight. And in late March, state media broadcast a live demonstration of the Atlas drone swarm system, which allows a single operator to command up to 96 coordinated drones through an AI-driven kill chain.
Meanwhile, a Mitchell Institute report published this week revealed that China has stationed more than 200 obsolete J-6 fighter jets, converted into attack drones, at six air bases near the Taiwan Strait. Analysts said the converted jets would function like cruise missiles in the opening phase of any Taiwan conflict, designed to overwhelm air defenses by forcing expensive interceptors to be spent on cheap, expendable targets.
The Stealth Advantage
The hybrid propulsion breakthrough addresses a specific gap: giving small tactical drones the range of fuel-powered aircraft without sacrificing the stealth advantages of electric flight. As drone warfare shifts toward autonomous swarms and attrition-based strategies, the ability to operate quietly and evade infrared detection could prove decisive in contested airspace.
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