Patent ID: 7603951

Claim:
A projectile comprising: a housing having a cavity defined therein, the cavity being open at one end of the housing and having a surface feature including at least one discontinuity in an interior surface of the housing that defines, at least in part, the cavity; a reactive material disposed within the cavity, the reactive material being arranged within the cavity to cooperatively interact with the at least one discontinuity so as to resist a change in an angular velocity of the reactive material relative to an angular velocity of the housing; and a tip coupled with the housing and substantially closing the cavity at the one end of the housing; wherein the reactive material and the tip are cooperatively positioned and configured to define a selected void space between a surface of the tip and a surface of the reactive material, and wherein the void space is sized and configured to substantially provide an intended time of ignition of the reactive material subsequent to impact of the tip with an intended target.