详细研究了模型飞机放宽静稳定性飞控系统设计方法，针对Ｋ８自由飞模型进行了设计并通过半物理仿真和试飞验证。表明该系统的设计方案可行，结果十分满意． The design method of the flight control system to relax the static stability of model aircraft is studied in detail. The K8 free-flying model is designed and verified by semi-physical simulation and flight test. It shows that the system design is feasible and the result is very satisfactory.