Mid-body marking projectile
A cartridge incorporating a projectile assembly, the projectile assembly having a base, mid body component housing a marking powder and lighter metallic nose cap. The projectile's mid-body component undergoes wall failure at impact, the wall failure is induced as forward momentum of the base and other residual forces act to expel the marking powder from the projectile, the manner of ejection suspending a low density material with contrast dye, in the vicinity of the impact, providing a gunner with visual cue in regard to a projectile's impact location.
1. An ammunition cartridge, incorporating a spin stabilized projectile, said projectile fabricated from three principle components (1) a non-frangible metallic nose having a conical shape including a curved surface and a closed base, (2) a mid-body cylinder fabricated from a frangible material, and (3) substantially solid metallic projectile base with a driving band, wherein the nose, the mid-body cylinder, and the projectile base form a void aft the base of the nose and within the mid-body cylinder, said void housing (4) a marking material, the combination of the nose, the mid-body cylinder, the projectile base, and the marking material forming a complete projectile assembly; wherein the projectile assembly, at impact, encounters shear, compressive and torsion loads causing failure of the frangible mid-body cylinder, whereby wall failure of the mid-body cylinder, coupled with residual forward momentum of the projectile base and residual rotational energy of the projectile base in combination, release, throw and eject said marking material from said void.
2. The ammunition cartridge of claim 1 , wherein the mid-body cylinder is fabricated from a polymer.
3. The ammunition cartridge of claim 1 , wherein the projectile assembly comprises a structural strength to undergo handling, weapon feeding, set-back and spin-up.
4. The ammunition cartridge of claim 1 , wherein the frangible walls of the mid-body cylinder fail when undergoing shear, torsion and compression caused by projectile impact.
5. The ammunition cartridge of claim 1 , wherein the marking material is released when the frangible walls fail, the released marking material being ejected into the atmosphere.
6. The ammunition cartridge of claim 5 , wherein the marking material uses materials selected to provide an optical signature, detectable by the human eye and electro-optic instruments.
7. The ammunition cartridge of claim 5 , wherein the ejected marking material quickly decelerates, becoming momentarily suspended in the atmosphere.
8. The ammunition cartridge of claim 7 , wherein the ejected marking material includes a low density marking powder.
9. The ammunition cartridge of claim 8 , wherein the ejected marking powder is momentarily suspended in the atmosphere, in the vicinity of the impact.
10. The ammunition cartridge of claim 7 , wherein the ejected marking material includes a chemiluminescent compound.
11. The ammunition cartridge of claim 7 , wherein the ejected marking material includes a pyrophoric material.
12. The ammunition cartridge of claim 7 , wherein the ejected marking material incorporates dyes or pigments that provide a visual contrast to the ambient environment.
13. The ammunition cartridge of claim 1 , wherein the nose is fabricated from a solid, inelastic non-frangible material.
14. The ammunition cartridge of claim 1 , wherein the frangible, mid body cylinder has a structure configured to shatter on impact.
15. The ammunition cartridge of claim 14 , wherein the structure has grooves inducing failure in compression forces, imparted at impact.
16. The ammunition cartridge of claim 14 , wherein the structure has grooves inducing failure by torsional forces, imparted at impact.