Hybrid shaped-charge/kinetic/energy penetrator

• US 4,463,678 A
• Filed: 04/01/1980
• Issued: 08/07/1984
• Est. Priority Date: 04/01/1980
• Status: Expired due to Term

• Current Assignee: the united states of america as represented by the secretary of the navy
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: Kim, Chulho, Weimer, Raymond J.
• Primary Examiner(s): Nelson, Peter A.
• Application Number:
  US06/132,463
• Time in Patent Office: 1,589 Days
• Field of Search: 102/24 HC, 102/56 SC, 102/307, 102/308, 102/309, 102/306, 102/476
• US Class Current: 102/307
• CPC Class Codes: F42B 12/16 in combination with an additional projectile or charge, acting successively on the target see also F42B12/625

Abstract

This invention is directed to the construction of armor-piercing projecti which combine the enhanced kinetic energy penetration due to metal matrix composite materials with that of a shaped-charge jet to defeat armor not vulnerable to either weapon alone.

Claims

1. A hybrid projectile which comprises:

a nose section of high density composite material;

a cylindrical middle section in axial alignment with said nose section and joined thereto in end-to-end relationship;

said cylindrical middle section formed of a metal composite unidirectionally reinforced with continuous fibers selected from the group consisting of boron or silicon carbide;

an aft section in axial alignment with said middle section, said aft section including a solid end portion and a cylindrical portion, said cylindrical portion joined in end-to-end relationship with said cylindrical middle section;

a shaped charge confined within said cylindrical portion of said aft section;

shaped-charge liner means enclosed by said shaped charge within said cylindrical portion of said aft section; and

inertial fuse means confined within said solid portion of said aft section.

2. A hybrid projectile as claimed in claim 1 in which:

said shaped-charge liner means is located a distance of from 11/2 to 2 times the diameter of the shaped charge from the aft end of said nose section.

3. A hybrid projectile as claimed in claim 1 in which:

said nose section is made of a high density metal matrix composite material comprised of a tungsten-fiber-reinforced matrix material selected from the group consisting of aluminum, copper, steel, or depleted uranium.

4. The invention according to claim 1 wherein the nose section is formed of a high density composite metal material of which one component is selected from the group consisting of aluminum, copper, steel or depleted uranium and is reinforced with tungsten fibers for defining a kinetic energy penetrator adapted to penetrate into armor substantially without diametral expansion.

5. The invention according to claims 1 or 4 wherein the cylindrical middle section is in the form of a tube of composite material including aluminum.

6. A hybrid projectile for use against heavy armor which is protected by light armor spaced outwardly therefrom for intercepting incoming projectiles and causing their premature detonation at an ineffective distance from the heavy armor, comprising:

a nose section adapted for penetrating armor;

an aft section carrying a forward facing shaped charge;

a middle section connecting the nose section and aft section resistant to collapse for maintaining the shaped charge face at a desired stand off distance from the rear of the nose section upon penetration of the nose section into heavy armor; and

an inertial fuse in the aft section connected with the shaped charge and adapted to activate only upon coming to rest;

whereby the projectile is adapted to pass completely through outwardly spaced light armor without ignition and have its shaped charge ignited only after the nose section has penetrated into the heavy armor and come to rest.

7. The invention according to claim 6 wherein the middle section maintains the face of the shaped charge at a stand-off distance from the aft end of the nose section which is around 11/2 to 2 times the diameter of the shaped charge.

8. The invention according to claim 6 or 7 wherein the middle section comprises a cylindrical tubular member axially aligned between the nose section and aft section.

9. The invention according to claim 8 wherein the tubular member is a metal composite including aluminum reinforced with continuous fibers selected from the group consisting of boron or silicon fibers.

10. The invention according to claim 6 wherein the nose section is formed of a high density metal composite.

11. The invention according to claim 6 or 10 wherein the high density metal composite nose section is a tungsten fiber reinforced material selected from the group consisting of aluminum, copper, steel or depleted uranium.