On Sept. 22, Qianyi Aerospace held a project review for the SY (Shiye)-300FF, a 300‑ton‑class LOx‑methane full‑flow staged‑combustion rocket engine. A panel of domestic liquid‑rocket experts vetted the engine’s technical specifications, development schedule, feasibility, manpower and equipment plans, and core technologies, and agreed to approve the project to proceed to follow‑on development.

2026-09-22

On Sept. 22, Qianyi Aerospace held a project review for the SY (Shiye)-300FF, a 300‑ton‑class LOx‑methane full‑flow staged‑combustion rocket engine. A panel of domestic liquid‑rocket experts vetted the engine’s technical specifications, development schedule, feasibility, manpower and equipment plans, and core technologies, and agreed to approve the project to proceed to follow‑on development.