Patent ID: 6145440
Filing Date: 2000-11-14
Classification: F41A,F41F,F42B

Abstract:
A training weapon system for a portable recoilless anti-armor weapon comprising a practice cartridge, said weapon having a barrel with a rifled bore therein, said rifled bore containing spiralled ridges, with depressed lands therebetween;said practice cartridge comprising a casing with a rear surface, an elongated cylindrical portion (3) and a conical forward portion (4), and a chamber for containing a sub-caliber projectile,said elongated cylindrical portion of said practice cartridge having a uniform outside dimension throughout its length equal to an ammunition round for said weapon, and filling a chamber of the portable recoilless anti-armor weapon when it is inserted,said conical forward portion forming a uniformly inclined line in cross-section,said conical forward portion having an axial length of about 22% of the length of the elongated cylindrical portion,said practice cartridge having a sub-caliber insert barrel (1) with its axis congruent with the axis of the barrel of said weapon when said practice cartridge is inserted into the firing position inside of the weapon,said insert barrel (1) having a rifled bore to provide spin stabilization of the sub-caliber projectile,said practice cartridge having a forward aligning member (5) placed axially between and in contact with said elongated cylindrical portion and said forward conical portion, for aligning said insert barrel inside said weapon,said aligning member comprising an annular sleeve with a central aperture comprising an inner circumference, and an outer circumference,said inner circumference of said aligning member fitting around the forward portion of said insert barrel,said outer circumference having a contact surface (10) engaging said ridges of the rifled bore of said recoilless weapon,said contact surface having a longitudinal extension exceeding the axial width of a rifle groove,so that the aligning member bridges adjacent rifle grooves and is engaging only the projecting ridges of only the rifles of said recoilless weapon.