METHOD OF CHARGE GAS DYNAMIC CENTRING AND DEVICE TO THIS END Russian patent published in 2014 - IPC F41A21/02 F42B10/00 

FIELD: weapons and ammunition.

SUBSTANCE: proposed device comprises barrel with breech closed by dual striker mechanism body and internal sleeve with lengthwise channel. Live round consists of cartridge with fuse and powder charge and billet arranged in sleeve with clearance and connected with said channel via grooves and drags composed by small-diameter bores arrange din groups along said barrel, each making a row of bores equally spaced in circle. Axes of said bores can make an angle with barrel radius line. Extra pressure source (blank cartridge) is arranged in cartridge and communicated with said channel via the bores and makes the high pressure cylinder or compressor. Said sleeve consists of pipe lengths with end surfaces whereat at arranged are said drags. On combustion of powder charge in cartridge, billet starts displacing in barrel. At a time, powder combusts in cartridge to make powder gases surpass the billet to flow in bore, channels, grooves and openings into barrel Biller body stopping barrel bores cause bearing gas ply to be created to centre the billet.

EFFECT: higher efficiency of common rounds with smooth cylindrical parts.

11 cl, 6 dwg