Qianyi Aerospace's 300-ton-class SY-300FF Liquid Rocket Engine Passes Project Review, to Power Xuanniao-FR Heavy-Lift Launch Vehicle

On September 22, 2026, Qianyi Aerospace held a project initiation review meeting for the 300-ton-class full-flow staged combustion liquid oxygen methane rocket engine SY-300FF (Shiye). A review panel composed of leading domestic liquid rocket engine experts heard the 'SY-300FF Engine Project Initiation Report' and conducted questioning and discussion, ultimately approving the project and allowing subsequent development work to proceed. The SY-300FF is positioned as the primary propulsion system for the 'Xuanniao-FR' heavy-lift launch vehicle, targeting high thrust, high reliability, reusability, and multi-mission adaptability, while also accommodating diverse commercial space launch scenarios. The engine adopts a 300-ton-class full-flow staged combustion liquid oxygen methane scheme—one of the most complex cycle types in liquid rocket engines. Previously, the only publicly disclosed similar approach in China's commercial space sector was represented by Blue Arrow's 'Lanyan' at the 220-ton-class level. The oxygen-rich/fuel-rich preburners of a full-flow staged combustion cycle face extremely high heat flux and pressure conditions. Hot-end core components such as injectors and turbopumps generally rely on additive manufacturing of high-temperature alloys and copper alloys, with integrated 3D printing being a key path to solving the manufacturing challenges of complex internal flow channels. Next, Qianyi Aerospace will list the SY-300FF as a key engineering task, iteratively optimizing the overall design and technical scheme. Value for powder buyers: ① The initiation of a 300-ton-class engine will drive demand for spherical powders of high-temperature alloys (such as GH4169 nickel-based) and high-conductivity copper alloys (such as CuCrZr, GRCop series) for printing hot-end components; ② Commercial space engine development cycles are long, so powder suppliers should engage early in material certification and batch consistency verification; ③ Pay attention to Qianyi Aerospace's subsequent engine trial production and printing service provider bidding trends to seize early opportunities in the aerospace powder supply chain.