According to the requirements of basic shape fuze and the standards of fuze safety design

an effective way to realize the delay arming of small-caliber fuze was researched. By putting forward a new delay arming mechanism of runaway escapement and establishing the mathematic models of mechanical motion

the dynamic simulation of mechanism was performed by using the method of advanced computer simulation. The simulation results indicate that the mechanism operates well and meets the requirement of GJB373A-97 about the delay arming distance of the small-caliber fuze.The delay arming mechanism of runaway escapement is a potential way to resolve the difficult problem about small-caliber fuze.