Jacket projectile

Abstract

A jacket projectile, such as an armour-piercing projectile, for ammunition, such as with a caliber of less than 13 mm, may include a core, a jacket, in particular tapering ogive-like and surrounding the core, and a guide shoe arranged between the core and the jacket. The core may be provided rear-sided with a profiling on its outer circumference, according to which the guide shoe is adapted in a shape-complementary manner in such a way that an anti-twist securing is formed between the guide shoe and the core.

1 . A jacket projectile, in particular an armor-piercing projectile, for ammunition, in particular with a caliber of less than 13 mm, comprising:
 a core;   a jacket, in particular tapering ogive-like and surrounding the core; and   a guide shoe arranged between said core and said jacket;   characterized in that the core is provided rear-sided with a profiling on its outer circumference, according to which the guide shoe is adapted in a shape-complementary manner in such a way that an anti-twist securing is formed between the guide shoe and the core.   
     
     
         2 . The jacket projectile according to  claim 1 , characterized in that the profiling is provided circumferentially and/or has a cross, star or polygonal shape in cross-section, in particular a fully circumferential wave-like contour. 
     
     
         3 . The jacket projectile according to  any of the preceding claims , characterized in that the profiling defines a profiling section on the core which is provided with at least one flattening, in particular a plurality of flattenings distributed at a particularly uniform distance in the circumferential direction, which has a different radial curvature with respect to a projectile center axis (M) compared to a core section adjacent to the profiling section, wherein in particular the profiling section is inclined at an angle of 10° to 30° relative to the projectile center axis (M). 
     
     
         4 . The jacket projectile, in particular according to  any of the preceding claims , in particular an armor-piercing projectile, for ammunition, in particular with a caliber of less than 13 mm, comprising:
 a core;   a jacket, in particular tapering ogive-like and surrounding the core; and   a guide shoe arranged between said core and said jacket;   characterized in that bottom faces of the core, jacket and guide shoe which lie on top of one another and are oriented transversely, in particular perpendicularly, to the longitudinal direction of the projectile are pressed against one another.   
     
     
         5 . The jacket projectile, in particular according to  any of the preceding claims , in particular an armor-piercing projectile, for ammunition, in particular with a caliber of less than 13 mm, comprising:
 a core;   a jacket, in particular tapering ogive-like and surrounding the core; and   a guide shoe arranged between said core and said jacket;   characterized in that the guide shoe is provided in particular rear-sided with a barb-like structuring on its outer circumference, which is adapted to hook onto the jacket when the projectile is fired.   
     
     
         6 . The jacket projectile according to  claim 5 , characterized in that the structuring is formed fully circumferentially, in particular in a thread-like manner, wherein in particular the thread-like structuring is adapted to the direction of twist of the barrel of the firearm. 
     
     
         7 . The jacket projectile according to  claim 5 or 6 , characterized in that the structuring is formed by a sawtooth-like indentation and/or a sawtooth-like protrusion in relation to the outer circumference of the guide shoe, wherein in particular the sawtooth-like indentation and/or the sawtooth-like protrusion has a hooking flank oriented essentially perpendicular to the longitudinal axis of the projectile and a further flank arranged at an acute angle to it. 
     
     
         8 . The jacket projectile according to any of  claims 5 to 7 , characterized in that the structuring, in particular the sawtooth-like indentation and/or the sawtooth-like protrusion, has a radial depth of less than 5%, in particular less than 4%, 3%, 2%, 1.5% or less than 1.25%, of an outer diameter of the guide shoe. 
     
     
         9 . The jacket projectile, in particular according to  any of the preceding claims , in particular an armor-piercing projectile, for ammunition, in particular with a caliber of less than 13 mm, comprising:
 a core;   a jacket, in particular tapering ogive-like and surrounding the core; and   a guide shoe arranged between said core and said jacket;   characterized in that an outer dimension of the guide shoe is oversized in relation to an inner dimension of the jacket and/or the jacket and the guide shoe are shape-matched to each other in such a way that an in particular force-fitting and/or form-fitting axial securing is formed.   
     
     
         10 . The jacket projectile according to  claim 9 , characterized in that the guide shoe has an oversize in the range of 0.01 mm to 0.06 mm in relation to the jacket and/or in the range of 2% to 7% of the jacket wall thickness. 
     
     
         11 . The jacket projectile according to  claim 9 or 10 , characterized in that the guide shoe and the jacket have a shape-matched protrusion/groove arrangement, according to which the guide shoe and the jacket interlock radially into one another for form-fitting axial securing against one another. 
     
     
         12 . The jacket projectile according to  claim 11 , characterized in that the guide shoe has on its outer circumference, in particular on a cylindrical section, at least one relief groove, in particular a plurality of relief grooves distributed at an in particular uniform distance in the longitudinal direction of the projectile, which forms a groove of the protrusion/groove arrangement and/or is arranged adjacent to the protrusion of the protrusion/groove arrangement. 
     
     
         13 . The jacket projectile according to any of  claims 9 to 12 , characterized in that the jacket has an axial stop on its inner circumference for a front of the guide shoe oriented in the projectile flight direction wherein in particular the axial stop is realized by an indentation formed by means of a profile recess, with which the front of the guide shoe comes into stop contact. 
     
     
         14 . The jacket projectile according to  any of the preceding claims , characterized in that the guide shoe and the jacket or the core and the guide shoe are made from one piece. 
     
     
         15 . The jacket projectile according to  one of the preceding claims , wherein the jacket is formed in two parts and/or has a hull-like, in particular essentially cylindrical, rear part and a front part connected thereto, wherein in particular the core is completely encapsulated by the front part and the rear part. 
     
     
         16 . The jacket projectile, in particular according to  any of the preceding claims , in particular an armor-piercing projectile, for ammunition, in particular with a caliber of less than 13 mm, comprising:
 a core;   a jacket, in particular tapering ogive-like and surrounding the core; and   a guide shoe arranged between said core and said jacket;   characterized in that the core has a rear-sided rear section which tapers in particular conically against the direction of flight, according to which an inner circumferential face of the guide shoe facing the rear section is shaped, which is arranged at a particularly constant distance from the rear section.   
     
     
         17 . The jacket projectile according to  claim 16 , characterized in that the distance is in the range of 0.01 mm to 0.6 mm or to 0.5 mm, in particular in the range of 0.025 mm to 0.6 mm, in the range of 0.05 mm to 0.5 mm, in the range of 0.075 mm to 0.4 mm or in the range of 0.1 mm to 0.3 mm. 
     
     
         18 . The jacket projectile according to  claim 16 or 17 , characterized in that the core and the guide shoe lie flat on each other, in particular on both sides, in particular are pressed against each other, adjacent to the rear section. 
     
     
         19 . The jacket projectile, in particular according to  any of the preceding claims , in particular an armor-piercing projectile, for ammunition, in particular with a caliber of less than 13 mm, comprising:
 a core;   a jacket, in particular tapering ogive-like and surrounding the core; and   a guide shoe arranged between said core and said jacket;   characterized in that a length of the core in the longitudinal direction of the projectile is in the range of 50% to 95%, in particular in the range of 55% to 90% or in the range of 60% to 85%, of a total projectile length and/or a length/diameter ratio of the core is in the range of 3 to 7, in particular in the range of 4 to 6.   
     
     
         20 . The jacket projectile, in particular according to  any of the preceding claims , in particular an armor-piercing projectile, for ammunition, in particular with a caliber of less than 13 mm, comprising:
 a core;   a jacket, in particular tapering ogive-like and surrounding the core; and   a guide shoe arranged between said core and said jacket;   characterized in that that the guide shoe is provided on its inner circumferential face facing the core with an annular recess, in the portion of which the core and the guide shoe are contactless.   
     
     
         21 . The jacket projectile according to  claim 20 , characterized in that in that the annular recess has a radial depth transversely to the longitudinal direction of the projectile of at most 50% of the wall thickness of the guide shoe adjacent to the annular recess. 
     
     
         22 . The jacket projectile according to  claim 20 or 21 , characterized in that the annular recess is arranged on a front-sided end section of the guide shoe facing the taper, in particular is arranged in such a way that a dimension in the longitudinal direction of the projectile of a front end of the guide shoe delimiting the annular recess in the longitudinal direction of the projectile is in the range of 90% to 110% of the wall thickness of the guide shoe. 
     
     
         23 . The jacket projectile according to one of  claims 20 to 22 , characterized in that a rear-sided end of the annular recess facing away from the taper lies at most at the axial height of the center of gravity of the jacket projectile. 
     
     
         24 . The jacket projectile according to  one of the preceding claims , characterized in that the core is dimensioned in such a way that there is a front-sided cavity, wherein in particular an insert is arranged in the cavity. 
     
     
         25 . The jacket projectile according to  claim 24 , characterized in that the insert is dimensioned and/or made of a material in such a way that the center of gravity of the jacket projectile is shifted to the rear compared to a jacket projectile without cavity. 
     
     
         26 . The jacket projectile according to  claim 24 or 25 , characterized in that the insert is made of a material which has a lower density than the material of the jacket and/or the core, in particular is made of aluminum, magnesium, brass, steel or plastic.