Jacket projectile

Abstract

A jacket projectile, in particular 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 guide shoe and the jacket may have a matching, in particular form-fitting interlocking, rib-recess structure.

1 . A jacket projectile for ammunition,
 a core;   a jacket surrounding the core; and   a guide shoe arranged between the core and the jacket,   wherein the guide shoe and the jacket have a matching rib-recess structure.   
     
     
         2 . The jacket projectile according to  claim 1 , wherein the guide shoe and the jacket are adapted to interlock radially based on the rib-recess structure to form-fit and axially secure against one another. 
     
     
         3 . The jacket projectile according to  claim 1 , wherein the guide shoe comprises at least one relief groove on its outer circumference, the at least one relief groove, forming a recess of the rib-recess structure and/or is arranged adjacent to a rib of the rib-recess structure. 
     
     
         4 . The jacket projectile according to  claim 1 , wherein the rib-recess structure comprises a plurality of alternately successive ribs and recesses in a longitudinal direction of the projectile, wherein:
 at least one rib and/or at least one recess has a different dimension in the longitudinal direction of the projectile compared one or more other ribs and/or recesses of the plurality of alternately successive ribs and recesses; and/or   a dimension of the ribs of the plurality of alternately successive ribs and recesses increases in the longitudinal direction of the projectile starting from front-sided, taper-proximal ribs in a direction of the projectile rear.   
     
     
         5 . The jacket projectile according to  claim 4 , wherein:
 50% to 70% of the front-sided, taper-proximal ribs have a dimension in the longitudinal direction of the projectile of 20% to 40% of a wall thickness of the jacket;   10% to 30% of centered ribs with respect to the longitudinal direction of the projectile have a dimension in the longitudinal direction of the projectile of 30% to 50% of the wall thickness of the jacket; and/or   10% to 30% of rear-sided ribs facing away from the taper have a dimension in the longitudinal direction of the projectile of 40% to 75% of the wall thickness of the jacket.   
     
     
         6 . The jacket projectile according to  claim 1 , wherein a recess of the rib-recess structure has a radial depth transversely to a longitudinal direction of the projectile, the radial depth being 5% of a wall thickness of the jacket plus 70% to 100% of half a difference between a field and rifling diameter. 
     
     
         7 . A jacket projectile for ammunition, comprising:
 a core;   a jacket surrounding the core; and   a guide shoe arranged between core and the jacket,   wherein a recess is provided rear-sided in the guide shoe on a bottom face oriented in an opposite direction to a direction of flight.   
     
     
         8 . The jacket projectile according to  claim 7 , wherein the recess is arranged centrally with respect to a center axis of the jacket projectile. 
     
     
         9 . The jacket projectile according to  claim 7 , wherein the recess is conical and/or V-shaped in cross-section, an opening angle of the recessing being 60° to 120°. 
     
     
         10 . The jacket projectile according to  claim 7 , wherein a depth of the recess in the longitudinal direction of the jacket projectile is 25% to 75% of a wall thickness of the bottom face. 
     
     
         11 . A jacket projectile for ammunition, comprising:
 a core;   a jacket surrounding the core; and   a guide shoe arranged between the core and the jacket,   wherein the guide shoe comprises an annular recess on its inner circumferential face facing the core, the annular recess being in a portion of which the core and the guide shoe are contactless.   
     
     
         12 . The jacket projectile according to  claim 11 , wherein the annular recess has a radial depth transversely to a longitudinal direction of the projectile of at most 50% of a wall thickness of the guide shoe adjacent to the annular recess. 
     
     
         13 . The jacket projectile according to  claim 11 , wherein the annular recess is arranged on a front-sided end section of the guide shoe facing a taper of the jacket. 
     
     
         14 . The jacket projectile according to  claim 11 , wherein a rear-sided end of the annular recess facing away from a taper of the jacket lies at most at an axial height of a center of gravity of the jacket projectile. 
     
     
         15 . The jacket projectile according to  claim 1 , wherein: the guide shoe and the jacket are made from one piece; or the core and the guide shoe are made from one piece. 
     
     
         16 . The jacket projectile according to  claim 1 , wherein the jacket is formed in two parts and/or has a hull-like rear part and a front part connected thereto. 
     
     
         17 . The jacket projectile according to  claim 1 , wherein the jacket has a tapering ogive-like shape, the matching rib-recess structure being form-fitting and interlocking. 
     
     
         18 . The jacket projectile according to  claim 1 , wherein the guide shoe comprises a plurality of relief grooves distributed on the outer circumference of the guide shoe in a longitudinal direction of the projectile. 
     
     
         19 . The jacket projectile according to  claim 7 , wherein the recess is a conical recess. 
     
     
         20 . The jacket projectile according to  claim 13 , wherein the annular recess is arranged such 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 90% to 110% of the wall thickness of the guide shoe.