Abstract: The designs of the airborne weapons, vehicle mounted weapons and ship-borne weapons are different from those of the weapons used on the ground. Their key point is that shooting action must be ensured on their carrying platforms under changing acceleration in various directions. A systematic research on the overload characteristics of machine guns is carried out using the dynamics theory of automatic weapons and the experiment methods. A dynamical model of the machine guns is established. The motions of automatic mechanism and gun-body are analyzed in detail under all kinds of overload conditions. The kinetic parameters corresponding to every phase are calculated by taking an airborne machine gun for example, and the movement reliabilities of mechanism movement are also deduced from these facts. The results show that the analytical and experimental results are consistent with each other approximately, proving the correctness of the model and the analytical method.

Key words: ordnance science and technoogy, machine gun, automatic mechanism, dynamical analysis, overload characteristic, experimentation