Cavitating core

Details Cavitating core Cavitating core

2007-02-12

2011-12-27

Johnson, Stephen M (Department: 3641)

Ammunition and explosives

Projectiles

Composite

C102S518000

Reexamination Certificate

active

08082851

ABSTRACT:
The invention relates to ammunition for missile weapon and firearm. The cavitating core of the invention comprises a head part conjugated with a secant nose surface along the cavitating edge, a central part, and an aft part with a gliding surface, wherein the caliber of the core is defined by the maximum diameter of the circle describing the core cross-section. The contour line enveloping the cross-sections from the cavitating edge to the core caliber in the plane of the core axial longitudinal section is limited by the dependence:in-line-formulae description="In-line Formulae" end="lead"?Dx=d×[1+(1x/d)×(2×sin φ/π)1/N]N, wherein-line-formulae description="In-line Formulae" end="tail"?Dx—is the current diameter of the core enveloping contour R, mm;d—is the cavitating edge diameter, mm;Lx—is the current distance from the cavitating edge to the core caliber, mm;φ=60° . . . 270°— is the apex angle of the tangents to the secant nose surface at the points of its conjugation with the cavitating edge measured from the side of the head part;N=(2π/φ)0.4. . . (2π/φ)0.2— is the core volume factor, wherein the core caliber is equal to the current diameter of the core enveloping contour Dx.As a result the invention makes it possible to increase the effective distance for hitting underwater targets when shooting from the air to the water and/or during underwater shooting using arbalests, harpoon guns, artillery, small and sporting-and-hunting weapons.

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Ardachev & Fedoseev pp. 160-177.
Chikin pp. 272-275.
Gurevich pp. 160-168.
Gurevich pp. 410-460.
Ivanov pp. 38-39.
Yakimov pp. 67-70.
PCT/RU2007/000068 International Search Report (Jul. 19, 2007), 1 page.

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