  The design requirement for flight visual simulation system is studied and the
overall structure and development process are proposed in this paper. Through
the construction of 3D scene model library and aircraft model, the rendering
and interaction of visual scene are implemented. The changes of aircraft flight
attitude in visual system are controlled by real-time calculation of aircraft
aerodynamic and dynamic equations and flight simulation effect is enhanced by
this kind of control. Several key techniques for optimizing 3D model and
relative methods for large terrain modeling are explored for improving loading
ability and rendering speed of the system. Experiment shows that, with specific
function and performance guaranteed as a premise, the system achieves expected
results, that is, precise real-time calculation of flight attitude and smooth
realistic screen effect.
