PROPELLANT BODY AND WAD (VERSIONS) Russian patent published in 2013 - IPC F42B10/34 F42B7/08 

FIELD: weapons and ammunition.

SUBSTANCE: propellant body represents a cylindrical- or barrel-like-shape case with through Laval-nozzle-shape orifice consisting of confuser and diffuser. In compliance with second version, said through orifice accommodates central body extending or not extending beyond the body cylindrical part and secured at pylons. In compliance with third version, through hole is made inside the body to accommodate central body secured at pylons to make together with cylindrical inner surface an annular Laval nozzle. In compliance with fourth version, folding or fixed fins are arranged at body rear. In compliance with first version, wad for said propellant represents a flat or a bulged center washer. In compliance with second version, said wad is composed of a washer with centering bead. In compliance with third version, said wad is barrel-shaped it outer surface following the diffuser inner shape. Note here that diffuser angle is smaller than self-braking angle at given factor of between diffuser and wad. In compliance with fourth version, said wad has lead ledges to center propellant.

EFFECT: higher initial velocity.

13 cl, 6 dwg