Flechette for direct fire weapons

Patent metadata

Field	Value
Publication number	US-9746298-B2
Application number	US-201414446370-A
Country	US
Kind code	B2
Filing date	Jul 30, 2014
Priority date	Jul 30, 2014
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

A flechette for use with a gun barrel having a tapered bore with a diameter at the initial bore section greater than the diameter at the emergent bore. The flechette includes a body constructed of a ductile material and having an elongated axis aligned with the axis of the tapered bore when positioned in the load end of the bore. The body also includes a cylindrical bulkhead as well as a bourrelet that are axially spaced from each other along the flechette and have an outside diameter substantially the same as the diameter at the initial bore section of the tapered bore. An elongated boom is attached at the tail end of the body while a penetrator is attached at the forward end of the body. Upon launch, both the bulkhead and bourrelet are compressed radially inward by the bore reduction so that the body is substantially cylindrical upon exit from the discharge end of the bore.

First claim

I claim:

1. A self-forming and self-supporting flechette that does not require discarding sabots for use with a gun barrel having a tapered bore in which a diameter at an initial bore located nearer a gun chamber is greater than a diameter at an emergent bore located nearer a gun muzzle, the flechette comprising:
a body constructed of a ductile material and having an axis aligned with an axis of a tapered bore when positioned in an initial bore section of a tapered gun bore, said body having a cylindrical bulkhead with a diameter substantially equal to the diameter at the initial bore section of said tapered bore and a cylindrical bourrelet with a diameter substantially equal to the diameter at an initial bore section of said tapered bore, said bourrelet being spaced axially forwardly of said cylindrical bulkhead in said tapered bore, having a forward facing end of said bourrlet that is concave in shape, a cone shaped penetrator axially aligned with and attached to a forward end of said body and having a diameter at one end the same as a bore diameter, a boom axially aligned with and attached to a rear end of said body, said body being substantially cylindrical in shape upon exit from a discharge end of said bore, and said boom tapers radially inwardly from said body and to a point adjacent a free end of said boom, said boom having a tail from said point and to said free end of said boom.

2. The flechette as defined in claim 1 wherein said tail comprises a fin, a flare, or a cone.

3. The flechette as defined in claim 1 , wherein said body comprises copper.

4. The flechette as defined in claim 1 , wherein said body comprises brass.

Assignees

• U S Army Res Laboratory Attn: Rdrl-Loc-I
• Us Army

Inventors

• Minnicino Ii Michael A

Classifications

• F41A21/16

  Barrels or gun tubes characterised by the shape of the bore · CPC title

• F42B14/02

  Driving bands; Rotating bands (F42B14/04 takes precedence) · CPC title

• F42B12/74

  of the core or solid body · CPC title

• F42B12/64 Primary

  the submissiles being of shot- or flechette-type · CPC title

• F42B12/06

  with hard or heavy core; Kinetic energy penetrators (F42B12/16, F42B12/74 take precedence) · CPC title