METHOD IMPARTING ROTATION TO BULLET OR OTHER PROJECTILE AND FIREARM COMPLEX FOR ITS IMPLEMENTATION Russian patent published in 2004 - IPC

FIELD: smooth-bore shells and small-arm projectiles, specifically, hunting complexes " weaponammunition ". SUBSTANCE: in compliance with invention jets of gunpowder gases formed by burning of propelling charge act from behind on projectile provided with at least one turbine with inclined blades that is mounted in rear part of projectile and oriented with inlet towards space behind projectile. Jets are generated mainly by transformation of static pressure in space occupied by projectile to essentially dynamic pressure. Jets interact with turbine and projectile bottom causing simultaneous translatory and rotary motion of projectile in bore starting from breech chamber. Proposed firearm complex includes small-arm or artillery weapon, propelling charge, projectile and partition separating projectile from charge. Partition is perforated with assemblage of through holes oriented longitudinally which diameter is smaller than partition thickness by factor of four as minimum and is installed without any possibility of axial movement under action of gunpowder gases beyond limits of breech chamber and turbine is oriented with its inlet towards space behind projectile. EFFECT: enhanced efficiency of imparting rotation to projectile in smooth bore thanks to kinetic energy of gunpowder gases and growth of efficiency in proportion to growth of caliber of weapon. 7 cl, 5 dwg