Patent ID: 7779759

Claim:
A water-entry projectile capable of supercavitation and spin-stabilization comprising: a forward section having a plurality of forward stepped sections, each stepped section being symmetrical in rotation about an axis and having a diameter at an aft end that is different from a diameter of a front end of an adjacent rearwardly located stepped section; an aft section having a main body and an aft stepped section, said aft section being symmetrical in rotation about said axis, and said main body having a maximum diameter larger than a maximum diameter of said forward section, the aft stepped section connected between the main body and the forward section and having a front end connected to the aft end of the most rearwardly located forward stepped section, the diameter at the front end of the aft stepped section being equal to the diameter of the aft end of the most rearwardly located forward stepped section; and wherein said aft section is located substantially aft of a center of gravity of said projectile.