High velocity ammunition round
First Claim
1. A sub-caliber bullet having long-range accuracy, comprising:
- a forward portion, a mid-portion and an aft portion;
said forward portion being a first material having a first density that is in excess of 10 g/cm3 and said mid-portion being a second material having a second density that is less than said first density;
said sub-caliber bullet havinga length, L, to maximum diameter, D, aspect ratio, L;
D, of at least 5;
1;
a diameter, d, of said forward portion and of said mid-portion satisfying an aerodynamic Power Law equation;
d=D*(x/L)n where x is a distance rearward from a nose of said sub-caliber bullet and n is a Power Law exponent that is between 0.5 and 0.75;
a center of pressure;
a center of gravity forward of the center of pressure;
a blind bore extending into said mid-portion from said aft portion and containing a sustainer propellant; and
a plurality of nozzles communicating the blind bore with an exterior surface of the bullet.
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Accused Products
Abstract
A sub-caliber bullet with an aerodynamic shape has long-range accuracy due to a high muzzle velocity and reduced time of flight to a target. The bullet has forward and aft portions and a mid-portion. The forward portion has a density in excess of 10/cm3 while the mid-portion has a lower density. The bullet has an aspect ratio of at least 5:1 and a diameter, d, that satisfies a Power Law equation:
d=D*(x/L)n
where D is a maximum bullet diameter, L is the length, x is a distance rearward from a nose of the bullet and n is a Power Law exponent that is between 0.5 and 0.75. In some embodiments, a blind bore extends into the mid-portion from the aft portion and a sustainer propellant within the bore ignites as the bullet exits a gun muzzle to provide a velocity boost and to overcome aerodynamic drag.
51 Citations
20 Claims
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1. A sub-caliber bullet having long-range accuracy, comprising:
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a forward portion, a mid-portion and an aft portion; said forward portion being a first material having a first density that is in excess of 10 g/cm3 and said mid-portion being a second material having a second density that is less than said first density; said sub-caliber bullet having a length, L, to maximum diameter, D, aspect ratio, L;
D, of at least 5;
1;a diameter, d, of said forward portion and of said mid-portion satisfying an aerodynamic Power Law equation;
d=D*(x/L)nwhere x is a distance rearward from a nose of said sub-caliber bullet and n is a Power Law exponent that is between 0.5 and 0.75; a center of pressure; a center of gravity forward of the center of pressure; a blind bore extending into said mid-portion from said aft portion and containing a sustainer propellant; and a plurality of nozzles communicating the blind bore with an exterior surface of the bullet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An ammunition round including a sub-caliber bullet having long range accuracy, comprising:
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a cartridge case filled with a cartridge propellant and having a bullet/sabot assembly partially inserted into an open end thereof; said sabot having a full caliber forward portion with a length effective to support said bullet; and said sub-caliber bullet having a length, L, to maximum diameter, D, aspect ratio, L;
D, of at least 5;
1;a diameter, d, of said forward portion and of said mid-portion satisfying an aerodynamic Power Law equation;
d=D*(x/L)nwhere x is a distance rearward from a nose of said sub-caliber bullet and n is a Power Law exponent that is between 0.5 and 0.75; a center of pressure; a center of gravity forward of the center of pressure; a blind bore extending into said mid-portion from said aft portion and containing a sustainer propellant; and a plurality of nozzles communicating the blind bore with an exterior surface of the bullet. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification