Abstract: A method of calculating dynamic response of the aileron balance weight during landing impact is presented in this paper. Because the main landing gear of the investigated airplane is a type of pure rocker arm, as well as airframe elasticity is considered, airplane motion and main landing gear motion are simultaneously solved, and the accelerations are implicit in the motion equations, Gill method can not be used directly. fortunately, the motion equations are linear equations about the accelerations. The linear equations for the accelerations can be solved by Gauss main element deletion method and the accelerations will be obtained. The differential equation will be solved by Gill method.

Key words: dynamic response, landing impact, rocker arm type