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Publication numberUS3902424 A
Publication typeGrant
Publication dateSep 2, 1975
Filing dateDec 7, 1973
Priority dateDec 7, 1973
Publication numberUS 3902424 A, US 3902424A, US-A-3902424, US3902424 A, US3902424A
InventorsFrancis W Dietsch, Ronald D Digirolamo
Original AssigneeUs Army
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Projectile
US 3902424 A
Abstract
A flechette small caliber projectile providing tracer visibility capability during flight while ballistically trajectory matching a small caliber ball flechette and retaining a high velocity low drag profile. Tracer material is located in a rearwardly opening internal cavity provided in the flechette projectile cylindrical body portion. Fin stabilizers surround or extend radially outward of the tracer cavity.
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Description  (OCR text may contain errors)

United States Patent Dietsch et al.

Assignee:

Filed:

PROJECTILE Inventors: Francis W. Dietsch, Levittown;

Ronald D. DiGirolamo, Philadelphia, both of Pa.

The United States of America as Dec. 7, 1973 App]. No.: 423,048

[52] US. Cl. 102/87; lO2/93; lOZ/DIG. 7 [51] Int. Cl. F42B 11/16 [58] Field of Search lO2/DIG. 7, 38, 93, 87

[56] References Cited UNITED STATES PATENTS 219,881 9/l879 Streeter 244/323 2,115,047 4/1938 Stevenson... 102/87 2.4()9,427 lO/l946 Fonberg 1 244/323 2,4l2,266 l2/l946 Hoagland 244/323 3,033.1 l6 5/1962 Critcher et al.. lO2/DlG. 7 X 3.l48,472 9/1964 Heggc et al lOZ/DlG. 7 X 3,401,636 9/1968 Ciccone et al l02/DlG. 7 X

OTHER PUBLICATIONS Fin Stabilization or Spin Major Hobart Ordnance Weapons Technology Jan-Feb. 1973.

Primary ExaminerStephen C. Bentley Assistant ExaminerHarold Tudor Attorney, Agent, or Firm-Nathan Edelberg; Robert P. Gibson [5 7} ABSTRACT A flechette small caliber projectile providing tracer visibility capability during flight while ballistically trajectory matching a small caliber ball flechette and retaining a high velocity low drag profile. Tracer material is located in a rearwardly opening internal cavity provided in the flechette projectile cylindrical body mporltion. Fin stabilizers surround or extend radially outward of the tracer cavity.

' 1 Claim, 2 Drawing Figures PROJEC'IILE The invention described herein may be manufactured. used and licensed by or for the Government for governmental purposes without the payment to us of any royalty thereon.

This invention relates to projectiles, and more particularly to a small caliber flechette-type projectile.

It is an object of the invention to provide a small caliber flechette projectile having tracer visibility capability during its flight.

Another object of the invention is to provide such a projectile that will have ballistic trajectory equivalent to that of a small caliber ball flechette projectile.

A further object of the invention is to provide such a projectile that retains a high velocity low drag profile.

These and other objects. features and advantages will become more apparent from the following description and accompanying drawings in which:

FIG. 1 is an elevational view. paratially broken away in section. ofa preferred projectile embodying the principles of the invention. J

FIG. 2 is a sectional view taken along lines 2-2 of FIG. 1.

The small caliber flechette projectile. shown generally at (FlG.l has a forward nose portion I] and a substantially cylindrical rearward portion l2 (FIGS. 1, 2 carrying a plurality of fin stabilizers 13 at the rearmost end of the projectile. Surrounding the forward portion of the projectile. particularly at the tapered nose I1. is a plurality of segmental sabot portions l4 held in pre-flight position by an appropriate rubber sealing ring [5. The sabot has its own tapered nose and. after the projectile is fired from a suitable gun muzzle. its multiple segmental portions 14 are released and rapidly fall away from the projectile due to the operative expanding and rupturing of sealing ring 15.

Preferably. the fin stabilizers 13. which extend substantially radially outward from the rearward end ofcylindrical portion 12. are each formed to incline at a slight angle (approximately 1.5") to the longitudinal axis of the projectile to facilitate imparting spin to the launched projectile.

The projectile cylindrical portion 12 is provided with a rcarwardly opening. longitudinally extending. drilled internal tracer cavity 16 in which is located, preferably.

an elongated tube 17 of tracer material 18 and a somewhat shorter length of tubing 19 containing igniter material 20 (FIG. 2). The igniter tube I9 is located at the rearward end of the cavity 16 and held in position thcrebetween by an appropriate deforming action provided on the rearmost end of the then filled hollow cylindrical portion 12. The preferred means of deforming the rearward end of cylindrical portion 12 is by crimping with an appropriate crimping tool positioned at predetermined peripheral locations between rearmost portions of adjacent ones of the outwardly extending fins l3. Preferably. the projectile cylindrical portion 12 has an external diameter of 0.l inches. its cavity 16 has a recessed or drilled surface diameter of 0.06 inches. and the span across a pair of substantially diametrically opposed fins IB is 0.2 inches.

Various modifications. changes or alterations may be resorted to without departing from the scope of the invention as defined in the appended claims.

We claim:

1. In a flechette projectile arrangement having a substantially pointed forward nose portionQa substantially cylindrical rearwardmost portion. and 'an intermediate substantially cylindrical portion.

said rearmos portion having a diameter greater than that of said inttgrmediate portion. I said cylindrical rearwardmost portion having a pluarlity of fin stabilizers extending radially outward l therefrom and a rearwaidly opening longitudinally extending internal tracer cavity. said cavity having a forward wall located rearward of said intermediate cylindrical portion.

a tube of tracer material in said cavity. y a multiple segmented sabot surrounding said nose portion.

tube. for retaining said tracer tube in said cavity.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US219881 *Aug 13, 1879Sep 23, 1879 Improvement in arrows
US2115047 *Nov 30, 1936Apr 26, 1938Stevenson ThomasTracer ammunition and to an igniter mixture for tracer compositions
US2409427 *Jul 1, 1943Oct 15, 1946Zygmunt FonbergEquilibrated rocket shell
US2412266 *Feb 22, 1944Dec 10, 1946Hoagland Reginald WReaction propelled device
US3033116 *May 20, 1958May 8, 1962John L CritcherAmmunition
US3148472 *Jun 11, 1962Sep 15, 1964Edward N HeggeSubcaliber projectile and sabot for high velocity firearms
US3401636 *Nov 30, 1966Sep 17, 1968Army UsaClad pyrotechnics
US3430570 *May 25, 1967Mar 4, 1969Aai CorpSabot with internal radial slots
US3476048 *Jun 30, 1967Nov 4, 1969Aai CorpUnderwater ammunition
US3515072 *May 2, 1968Jun 2, 1970Us ArmyTracer projectile
US3834314 *Dec 29, 1972Sep 10, 1974Aai CorpPuller sabot ammunition with slip seal
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4123975 *Aug 3, 1977Nov 7, 1978Mohaupt Henry HPenetrating projectile system and apparatus
US4536928 *Nov 17, 1983Aug 27, 1985Honeywell Inc.Manufacture of projectiles
US4706569 *Nov 9, 1984Nov 17, 1987Rheinmetall GmbhArmor breaking projectile
US4714024 *Jun 13, 1986Dec 22, 1987Rheinmetall GmbhNose for an inertial projectile
US4754704 *Mar 25, 1986Jul 5, 1988Nico-Pyrotechnik Hanns-Jurgen Diederichs Gmbh & Co. KgPropellant charge for the reduction of base eddying
US4858533 *May 6, 1988Aug 22, 1989Honeywell Inc.Cased telescoped ammunition round for a fin stabilized projectile
US5097766 *Jun 5, 1990Mar 24, 1992Olin CorporationKinetic energy projectile with pyrotechnic payload
US6655293Mar 12, 2001Dec 2, 2003General Dynamics Ordnance And Tactical Systems, Inc.Fin-stabilized ammunition
US6854394Aug 15, 2003Feb 15, 2005General Dynamics Ordnance And Tactical Systems, Inc.Fin-stabilized ammunition
US6920827Oct 31, 2003Jul 26, 2005Raytheon CompanyVehicle-borne system and method for countering an incoming threat
US6931994Nov 21, 2002Aug 23, 2005Raytheon CompanyTandem warhead
US6973878Jun 5, 2003Dec 13, 2005Raytheon CompanyWarhead with aligned projectiles
US7017496Mar 10, 2003Mar 28, 2006Raytheon CompanyKinetic energy rod warhead with imploding charge for isotropic firing of the penetrators
US7143698May 13, 2005Dec 5, 2006Raytheon CompanyTandem warhead
US7412916Jan 18, 2006Aug 19, 2008Raytheon CompanyFixed deployed net for hit-to-kill vehicle
US7415917Mar 10, 2003Aug 26, 2008Raytheon CompanyFixed deployed net for hit-to-kill vehicle
US7621222Feb 17, 2005Nov 24, 2009Raytheon CompanyKinetic energy rod warhead with lower deployment angles
US7624682Feb 17, 2005Dec 1, 2009Raytheon CompanyKinetic energy rod warhead with lower deployment angles
US7624683Jul 20, 2005Dec 1, 2009Raytheon CompanyKinetic energy rod warhead with projectile spacing
US7717042Jan 6, 2005May 18, 2010Raytheon CompanyWide area dispersal warhead
US7726244Jul 20, 2007Jun 1, 2010Raytheon CompanyMine counter measure system
US8127686Jul 20, 2005Mar 6, 2012Raytheon CompanyKinetic energy rod warhead with aiming mechanism
US8418623Apr 2, 2010Apr 16, 2013Raytheon CompanyMulti-point time spacing kinetic energy rod warhead and system
WO1991019160A1 *Mar 11, 1991Dec 12, 1991Olin CorpKinetic energy projectile with pyrotechnic payload
Classifications
U.S. Classification102/513, 102/703
International ClassificationF42B12/38, F42B10/08, F42B14/06
Cooperative ClassificationY10S102/703, F42B10/08, F42B12/38, F42B14/061
European ClassificationF42B10/08, F42B12/38, F42B14/06B