An arrangement of a series of combustible and explosive elements consisting of a primer, a detonator, a delay, a relay, a lead and booster charge, one or more of which may be either combined with another element or omitted.

The function of the explosive train is to accomplish the controlled augmentation of a relatively small impulse into one of sufficient energy to cause the main charge of the munition to function. A train of combustible and explosive elements arranged in order of decreasing sensitivity.

The explosive train accomplishes the controlled augmentation of small impulse into one of suitable energy to actuate the main charge. For instance within a hand-lit shell the train is Delay fuse ^_> shell leader ^_> lifting charge ^_> shell delay ^_> bursting charg e ^_> star prime ^_> star.