Abstract: An improved small caliber armor piercing projectile (10) having a fin stabilized sub-caliber high density rod penetrator (11) and an adequately large tracer cavity (23). The tracer cavity does not degrade the armor penetrating capability of the projectile. The rod penetrator core is supported structurally during gun launch by a minimum weight segmented sabot (13) which engages the barrel rifling, followed by a segmented plastic obturator (15), followed by a solid plastic obturator ring (17) which provides an uninterrupted gas seal and which holds all segmented components together around the rod penetrator prior to launch. The solid obturator ring is blown apart upon muzzle exit by entrapped propellant gas pressure retained in an internal aft cavity (19). All plastic obturator components are located behind the structural sabot so that the propellant gas pressure will maintain the segmented obturator under hydrostatic compression while in the barrel to ensure projectile inbore stability.

Abstract: A subcaliber kinetic energy projectile (1) including a penetrator (2) and a segmented sabot (3) which is provided with a front support (4) and with a second support (5) that is disposed at an axial distance behind the first support, with the second support (5) including a rotationally symmetrical air pocket (6) that faces the first support (4) and the first support (4) is provided with air passage openings (43, 44, 45).In the sabot, the relationship of L/D.gtoreq.1.2 exists between the length L of the penetrator tip (8) ahead of the first support (4) and the caliber D. The relationship x.gtoreq.0.45 * .iota. further applies between the distances x and .iota., with x being the distance between the trailing edge (10) of the sabot and the base surface (11) of the air pocket (6) in the second support (5) and .iota. being the distance between the trailing edge (10) of the sabot (3) and the leading edge (12) of the sabot at the surface of the penetrator (2).

Abstract: A cartridge assembly for propelling a subcaliber penetrator through a gun tube which has a portion of the propellant charge contained in an annular cavity surrounding the sabot is disclosed. The annular cavity is defined by the scoop shaped front bourrelet, the aft bourrelet which has three radially extending support posts and bore riding shoes, and a combustible tubular case extension over the aft bourrelet extending forward to the front bourrelet. The assembly includes cartridge case having a multistrand ignition system having a plurality of flexible combustible ignition strand. The strands extend through the propellant charge in the case and extend between the posts of the aft bourrelet into the annular cavity to simultaneously ignite the propellant charge contained therein with the portion of the charge in the cartridge case.

Abstract: A sabot bullet is disclosed having a front conical part and a rear conical part converging towards each other and joined by an integral interconnecting part having a smooth outer surface joining with the adjacent ends of the conical front and rear parts. The front conical part has a forwardly open empty recess having flat side walls and a polygonal radial cross section in the front end thereof.

Abstract: A subcaliber projectile assembly includes a subcaliber projectile; a supporting member engaging the circumferential surface of the projectile; a guide band supported on the supporting member; and a propelling cage supported on the circumferential surface rearwardly of the guide band. The propelling cage is formed of a plurality of segments mounted in a circular array and each segment is a stamped sheet metal component. Each segment has a bottom portion shaped as a circular cylinder section having opposite longitudinal edges and an underside being in engagement with the circumferential surface of the projectile. Each segment further has two longitudinal ribs connected to the bottom portion along the longitudinal edges and rising radially from the bottom portion. Each segment also has a transverse wall portion extending transversely to the bottom portion and the ribs and interconnecting the ribs with one another at a front-side longitudinal end of the segment.

Abstract: A saboted projectile for ensuring gas tight sealing of a threaded penetrator with its sabot having a tapping. This sealing device is formed of an elastomer element applied on the rear portion of the sabot and comprises a lip in resilient abutment on the penetrator and is obtained by molding over the sabot having an insert engaged therein.

Abstract: A sabot for retaining therein a conventionally shaped tapered-nose bullet when the sabot is seated in place in a shotgun shell casing, so that the shotgun can be used to fire conventional lead or copper jacketed lead bullets in a shotgun.

Abstract: A subcaliber projectile including a segmented discardable propelling cage sabot which encloses at least a portion of the projectile body and has a common form-locking zone for the transfer of acceleration forces from the propelling cage to the projectile body. The form-locking zone has mating annular grooves and counter grooves on the exterior surface of the projectile body and on the interior surface of the propelling cage, and is subdivided into several form-locking zone regions in which the annular grooves have a different groove spacing that is adapted to the locally occurring shear stresses. These measures enhance simplification of the manufacturing process and result in an improvement of the release of the propelling cage sabot from the projectile body and in an increase in the target impact velocity of the projectile body.

Abstract: A projectile-sabot assembly includes a projectile rod enclosed by a pluray of sabot pieces and a plurality of heat sensitive shape memory alloy metal shims positioned so that when the assembly is fired, the shims heat up and expand to exert separating forces on the sabot pieces.

Abstract: The technical sector of the invention is that of sealing bands for arrow-type munitions.The sealing band (5) according to the invention is arranged in an annular groove (9) of a sabot (2) of an arrow-type projectile, and is characterized in that it comprises a substantially annular rear zone (8) on which, when the band (5) is positioned in the groove, comes into contact a seal (6) joined to the sabot, and in that it comprises means (12, 13, 17) ensuring its mechanical joining, due to similarity of shape, with the material forming the seal (6).Application to the field of large-caliber munitions.

Abstract: A cartridge assembly for propelling a subscaliber penetrator through a gun tube which has a portion of the propellant charge contained in an annular cavity surrounding the sabot is disclosed. The annular cavity is defined by the scoop shaped front bourrelet, the aft bourrelet which has three radially extending support posts and bore riding shoes, and a combustible tubular case extension over the aft bourrelet extending forward to the front bourrelet. The assemlby includes cartridge case having a multistrand ignition system having a plurality of flexible combustible ignition strand. The strands extend through the propellant charge in the case and extend between the posts of the aft bourrelet into the annular cavity to simultaneously ignite the propellant charge contained therein with the portion of the charge in the cartridge case.

Abstract: An improved sabot bullet for use primarily in connection with shotgun shells which includes a slug having a forward portion which radially converges towards the middle portion thereof, and an outer conforming sabot casing which includes a pair of sabot segments which substantially surround and conform to the outer configuration of the slug. Each sabot segment is constructed to be slightly radially spaced from the slug near the constricted middle portion thereof, and to converge and engage the radially diverging portion of the slug near the forward end thereof, so as to cause the slug to be guided mainly at a point adjacent the front end thereof. Each sabot segment is also constructed to extend rearwardly beyond the rear end of the slug to facilitate rearward movement of the slug relative to the sabot, and consequent outward radial wedging of the sabot segments against the inner walls of the gun barrel, upon firing the fireman.

Abstract: The technical field of the invention is that of slipping driving bands fitted to projectiles of any caliber fired from a rifled barrel. The slipping driving band according to the invention consists of a driving band boby 8 and a front ring 7 arranged in a circumferential groove 6 of the projectile 1 and separated by an axial gap 12, and is characterized by the fact that the bottom of the groove 6 has a tapered seat 9, the angle of which opens towards the rear of the projectile and that the driving band body 8 has an internal profile complementary with that of the tapered seat 9. The present invention is particularly suited to discarding sabot projectiles of medium caliber.

Abstract: A reinforced sub-caliber kinetic energy penetrator comprises an elongated solid cylindrical hard metal body having a plurality of circumferential channels in said surface of said body. A plurality of circumferential reinforcing bands are swaged into the channels in the body to mechanically interlock the bands and said body together. The reinforcing bands stiffen the penetrator during impact with a target at oblique angles and enhance the target penetration and after armor effects.

Abstract: A device for holding and guiding a sub-projectile in a cylindrical casing and in a weapon barrel, which includes a sabot having a sub-projectile within the sabot, a cylindrical casing within which is disposed a projectile, which comprises the sub-projectile and sabot, the sabot having a plurality of arms substantially in the aft section for providing stability and guidance to the projectile inside the weapon barrel, means within the casing for providing stability for the aft section of the projectile, and an annular bush within the fore section of the cylindrical casing cooperating with the fore section of the sabot for providing stability of the sub-projectile.

Abstract: A cartridge assembly is provided, in one embodiment, comprising a combustible casing with an open forward end and an open breach end, enclosed at the breech end by a thin metal stub casing, a projectile assembly mounted in the forward end, an igniter assembly, a resilient obturator pop riveted to the casing, and annular sabot, and a plurality of flexible combustible priming tubes immersed in a propellant charge and extending the length of the casing. In another embodiment, the combustible casing comprises two separate casings joined together with fasteners, each casing having a set of flexible combustible priming tubes, an interface portion defined between the two where respective ends of combustible priming tubes abut. In both embodiments, the priming tubes combust rapidly producing complete ignition of the propellant charge and resultant stable projectile flight.

Abstract: A unitary ammunition unit comprising a propellant charge. An explosive sub-caliber projectile having a pull-drive type of sabot is mounted on the propellant charge. The sub-caliber projectile is at least partially formed of a heavy-metal-sinter alloy of high density.

Abstract: The technical sector of the invention is that of devices for stopping rotation between a rifled bar and a sabot of an arrow-type projectile.The device according to the invention is characterized in that it comprises at least one obstacle (6) disposed in a housing (7) made radially in the sabot (1), immobilized in translation in its housing by a locking means and one end (8) of which comes into contact with the bar (2) at the level of a bearing surface arranged at a distance from the axis (4) of the bar which is at least equal to the maximum diameter of the rifling of the bar.Application to large-caliber arrow-type munitions.

Abstract: A subcaliber projectile including a penetrator preferably made of tungsten eavy metal, and having a penetrator tip section and a section following thereafter and extending over the major portion of the penetrator length which is provided with an external thread (helical groove) or circumferential annular grooves to provide a form-locking connection with a discardable propelling cage sabot. To realize improved piercing power for the penetrator, the form-locking region is composed of annular grooves without a pitch, or of a fine metric thread having a thread valley, with a width of approximately one to three times the base width of the groove defining wall or of a thread peak. Preferably a more brittle material is employed in the front penetrator region than in the tail region, and a further indentation structure is incorporated in the first frontal thread turns or grooves of the form-locking region.

Abstract: A sabot is provided which is composed of a plurality of sabot segments which engage and form a shell surrounding a bullet of improved configuration. The inner surface of each sabot segment matches and is complimentary to the adjacent outer surface portions of the bullet body. The bullet body has a pair of axially aligned conical parts adjacent to and spaced apart from each other, each conical part increasing in diameter as the conical part extends away from the other conical part. Between the conical parts, the bullet has an extended central portion serving to separate and interconnect the conical parts.

Abstract: An improved segmented doubled ramp sabot for launching a sub-caliber projile, comprising a plurality of longitudinal ribs disposed on the forward and aft ramp sections of the sabot, and a plurality of longitudinal ribs disposed between an obturating band seat and a conical borerider. The combined cross sectional area of the double ramp segments, together with the combined cross sectional area of the ribs, are such that the sum of these areas is approximately equal to the cross sectional area of a double ramp sabot representative of prior art. As a result, axial stiffness is unaffected, and uniform shear traction forces between the sabot and projectile are maintained. In addition, the transverse bending stiffness of the sabot is improved, thereby reducing in-bore vibration and shot dispersion while allowing maximum energy transfer to the projectile. Use of a stiffer material for the ribs further improves transverse bending stiffness and performance.

Abstract: A containment bag has two sections. A forward section with one end secured positively in the sabot-obturator interface region during the assembly of the sabot, obturator, projectile and casing adapter. The other end of the forward section has a circumferential securing band, for example a band of loops of the type marketed under the trademark Velcro. An aft bag section is secured to the cartridge casing at one end in a conventional manner and the other end has a circumferential securing band; Velcro hooks for example. The bands join the two sections of the bag together when the cartridge casing is brought into position to be bonded to the cartridge adapter.

Abstract: An impact projectile which comprises at least two impact bodies centered with respect to one another and disposed one axially behind the other with means for separating the two bodies axially upon approach to the target. The separation can be effected by thermal means controlled by a proximity switch and/or by flight duration. The projectile is especially designed for penetrating armored vehicles having multi-layer armored walls.

Abstract: A cased telescoped ammunition round 10 for a fin stabilized penetrator 32. A full caliber control tube 24 is positioned within casing 12, its forward end 28 being secured to front seal 22. The side walls 87 of control tube 24 are tapered, increasing in thickness from the free standing aft end 26 of control tube 24 to its forward end 28. Penetrator 32 and sabot 36 are positioned within control tube 24 with obturator band 46 and retaining groove 36 of aft bourrelet 36 positioned within control tube 24. Retaining groove 52 at the aft end of control tube 24 with split ring 50 and retaining groove 48 of aft bourrelet 36 retain sabot 34 and penetrator 32 within control tube 24 until round 10 is fired. Tapered side walls 87 minimize the volume of control tube 24 while assuring that side walls 87 are strong enough to withstand forces acting on control tube 24 forward of obturator band 46 when round 10 is fired.

Abstract: A projectile arrangement including a subcaliber projectile body and a segmented, discardable propelling cage sabot provided with a common form locking zone for the transmission of the acceleration forces. To reduce the notch effect on the projectile body, and thus the danger of breakage, due to the conventional thread grooves in the form locking zone, particularly in long, slender penetrators made of a breakage susceptible tungsten heavy metal, a novel form locking connection for the inner form locking region between the propelling cage and the projectile body is provided. This novel form locking connection is characterized in that in the region of the form locking zone beneath the exterior gas pressure receiving surface of the sabot, only the exterior surface of the projectile body is provided with preferably annular microgrooves and the surrounding inner surface of the sabot is smooth.

Abstract: A propulsion mechanism for a subcaliber projectile, wherein the propulsion mechanism possesses a close-fitted zone in common with the projectile for subjecting a gas pressure-receiving surface to a load caused by the propellent gases; for the utilization in a recessed surface, of an incident flow of air subsequent to exiting from a weapon barrel; and a tensioning device for the assumption of tensile stresses, with the device being connected with a central carrier component adjoining the projectile body.

Abstract: An apparatus is provided for the loading and automatic firing in a weapon of an ammunition unit provided with a sabot without consequential deterioration of the ballistics of the ammunition unit. The apparatus comprises a unit consisting of a number of prismatic or cuneiform elements which together form a rotationally symmetrical body with an external surface. This surface is truncated or curved and flares rearwardly from its leading portion. The apparatus also comprises an enclosing device for enclosing these elements at the trailing portions of the body, and unifying the elements on loading of the ammunition unit into the barrel of the weapon. The enclosing device also encloses the leading portions of the sabot. This device is arranged to burst on movement of the ammunition unit in the barrel.

Abstract: A segmented, discardable sabot for a slender sub-caliber kinetic energy projectile. At least two sabot segments are provided having adjacent plane parallel segment separating faces and presenting at least one caliber-sized gas sealing pressure flange member and a non-caliber sized partial region along the longitudinal extent of the sabot. The overall cross section of the sabot, at least in the partial region, has an essentially polygonal cross-sectional shape, and a tangent placed at any point of the periphery of the sabot does not pass through the cross-sectional area of the sabot, thereby providing increased bending stiffness in the non-caliber-sized region of the sabot.

Abstract: A projectile which is intended for firing from an electromagnetic projectile acceleration device equipped with parallel acceleration rails and forming a plasma arc cushion. To realize high speeds as well as uniform stress on the projectile during the acceleration phase, the projectile, when seen in the direction of flight, is composed of at least two spaced partial projectile sections which are arranged one behind the other and are separated from one another by intermediate projectile portions, and plasma forming substances are disposed at the rear ends of the respective partial projectile sections.

Abstract: A sabot-projectile arrangement adapted for being ejected from a gun barrel for the purpose of combatting actively and passively reacting armor. The arrangement comprises first and second projectiles, each having a different coefficient of air resistance (c.sub.w). A discarding sabot is comprised of segments which define a receptacle for accommodating the first and second projectiles with their longitudinal axes flush behind one another in order to follow one another in a spaced relationship on a common trajectory when the sabot-projectile arrangement is fired from a gun. Form locking means defines a form locking connection between the receptacle and each of the projectiles. The form locking connection existing between the leading first projectile disposed in the receptacle and the segments of the sabot are released earlier than when the segments are separated from the second projectile after the sabot-projectile arrangement leaves the gun barrel.

Abstract: A projectile has a main body having a smooth end region, an intermediate sleeve over the smooth end region, a guide mechanism sleeve and guide fins. In one embodiment, the intermediate sleeve has an internal surface and an external thread, the intermediate sleeve being soldered at the internal surface to the smooth end region of the main body. The guide mechanism sleeve has an internal thread screwed with the internal thread onto the external thread of the intermediate sleeve at a tail region of the projectile. The guide fins are fixed to the guide mechanism sleeve. In a second embodiment, the projectile includes a longitudinally extending main body having an end region conically tapered toward a front end of the projectile, and a conically tapered intermediate sleeve having longitudinally extending slots, regions of the intermediate sleeve between the slots being radially elastic. The intermediate sleeve is fitted over the tapered end region of the main body so as to clamp the tapered end region.

Abstract: An article of ammunition with propulsion mechanism, incorporating a fin-stabilized projectile, the propulsion mechanism, a casing for a propellant, and a propellent charge, and wherein the propulsion mechanism includes an empty volume or open void intermediate front and rear guidance segments thereof.

Abstract: A propulsion mechanism or sabot for a subcaliber projectile, in which the mechanism is constructed segmented, and which includes a carrier component defining a form-fitted zone between itself and the projectile, a front part which is connected with the carrier component which is constructed with an air pocket, a rearward positioning or adjusting part defining the projectile caliber which is connected to the carrier component, and an outer part which is arranged intermediate the front part and the rearward positioning part.

Abstract: A propulsion cage usually constructed from three segments, intended for a subcaliber projectile is designed so that a surface exposed to the propellant gases is extended preferably in the shape of a truncated cone with the apex toward the rear up to the end of the subcaliber projectile. Force derived from the propellant gases can be transmitted in uniform distribution practically over the entire surface of the subcaliber projectile. At the same time, transmission between the propulsion cage and the subcaliber projectile is enhanced so that the entire propulsion cage can be manufactured from a fiber-reinforced synthetic resin, so that there is no absolute need for providing additional shape-mating transitions between the propulsion cage and the subcaliber projectile, and so that yet a very high propellant gas pressure can be utilized. Preferably, each segment exhibits wedge-shaped cavities open in the firing direction which are filled with cores.

Abstract: A method of producing a discarding propelling cage sabot projectile, and to a discarding propelling cage sabot projectile produced according to this method, in which, in a vulcanizing tool including an injection mold, a uniformly thin layer of rubber is applied to the rear gas pressure receiving surface of the sabot so as to secure and seal the individual sabot segments against one another. In such a method, when the liquid sealing material is injected into the injection mold, there exists the danger that, due to the high pressure existing at that time, sealing material may enter, in an uncontrolling manner, into the cylindrical inner annular gap or annulus between the sabot and the projectile body. This may considerably adversely influence the release behavior of the discarding sabot segments and lead to a reduction of hit accuracy.

Abstract: A saboted projectile having an elongated sub-projectile having a double-r sabot mounted thereon. The sabot includes a main body portion having a radially extending forward scoop and a central bulkhead between which a toroidal-shaped cavity is formed. A self-sealing container extending between the scoop and the bulkhead encloses the cavity in which a solid propellant is contained. A through-hole, formed in the bulkhead, extends from the cavity to the rear surface of the bulkhead. The through-hole has an opening at the rear of the bulkhead for housing a blow-out plug. An igniter is mounted in the plug for igniting the solid propellant contained in the cavity after a predetermined delay. Ignition may also be achieved via pores or openings in the container which may contain a deterred propellant.

Abstract: A fin stabilized, subcaliber propelling cage sabot projectile including a projectile body having a high length to diameter ratio, i.e., an arrow projectile, and a discardable propelling cage sabot composed of a plurality of segments which coaxially surround a portion of the length of the projectile body and define an annular air pockect in the front surface of the sabot.To improve the process of releasing the propelling cage sabot segments from the projectile body once the projectile has left the gun barrel, a desired break location is provided in the propelling cage segments behind the frontal air pocket. This desired break location leads to separation of the outer front portion of the propelling cage sabot segments from the remainder of the sabot segments and thus, in the final effect, to an increase in hit accuracy.

Abstract: The invention relates to hunting ammunitions each comprising a projectile actuated by the combustion of a propellant charge and characterized in that it comprises an annular chamber separated from the propellant charge by a partition comprising one or several brittle areas.

Abstract: An improved inertial projectile arrangement including a subcaliber projectile penetrator which is composed of a prepenetrator portion with a nose point and a main penetrator portion. The penetrator has a large length/diameter ratio and a high density. A sabot, composed of at least two segments, encompasses a part of the prepenetrator portion. The periphery of the encompassed prepenetrator and the sabot being joined to each other by form-locking means. The sabot segments separate from the penetrator upon exiting from the muzzle of the gun barrel from which the projectile is fired. The form-locking means are at least partially formed of irregularities or unevenesses on the periphery of the encompassed prepenetrator portion and the interior periphery of the sabot. A plurality of fracture zones and a transfer frusto-conical portion are disposed on the prepenetrator. The fracture zones achieve an intended breakup of the prepenetrator upon impact.

Abstract: The invention concerns a fin-stabilized discarding sabot projectile for employment from a rifled barrel and is particularly suitable for automatic cannons having calibers from 12.7 to 70 millimeters. The full rate of spin commensurate with the rifling twist of a specific barrel and the muzzle velocity is imparted to the projectile during launch using a rotating band which is fixed and an integral component of the discarding sabot. The discarding sabot design involves the in-place injection molding of the sabot body, including a seal with obturator, onto the fin-stabilized projectile. The absence of slipping rotating band provides for a rugged sabot configuration which is particularly important for ammunition employed from automatic cannons. Launching at full rate of spin results in large centrifugal forces acting on the components of the sabot which provides for instantaneous and precise sabot separation upon projectile exit from the muzzle.

Abstract: The invention relates to a propelling cage sabot for a subcaliber, armor piercing kinetic energy projectile having a high length to diameter ratio which will be placed in a tube of a weapon and lauched by propelling charge gases. The sabot has a support member and fixing means. The sabot further having a gas pressure receiving surface to be charged with the propelling charge gases, a longitudinal axis and an air pocket for positively utilizing air flowing in the pocket once the projectile leaves the tube of the weapon. The sabot is segmented for separation from the projectile and includes a joint form-locking zone for attachment with the projectile; and a fiber component connected by the fixing means with the support member for absorbing tensile stresses. The fiber component is made up of more than one oriented individual member. Each individual member is oriented such that the individual member extends along the longitudinal axis between a frontal fixing region and a rear fixing region.

Abstract: A cased telescoped ammunition round 40 for a fin stabilized penetrator projectile 50. A cylindrical core tube 48 is positioned within the casing 42. Projectile 50 and its sabot 52 are positioned within core tube 48. The space between core tube 48 and casing is filled with the main charge 66. An igniter 62 is located in the rear seal 46 of casing 42 and when initiated, ignites booster charge 64 located within core tube 48 between sabot 52 and rear seal 46. Ignition ports 70 in core tube 48 permit the ignition products of booster charge 64 to ignite main charge 66 when sabot 52 moves a predetermined distance through core tube 48.

Abstract: A subcaliber projectile has a small-diameter projectile body extending along and centered on an axis, having a radially outwardly directed outer surface, and adapted to move in a predetermined axial back-to-front direction, and a sabot formed of a plurality of similar segments annularly surrounding at least a portion of the body, the segments forming an inner surface generally on the outer surface of the body and having an extreme front end and an extreme rear end. This projectile is formed on one of these surfaces at the extreme rear end of the sabot with a radially projecting ridge of generally semicircular shape having a center of curvature. The other of the surfaces is formed at the extreme rear end of each segment of the sabot with a radially open recess complementary to and receiving the ridge.

Abstract: A fin-stabilized projectile for weapons selectively possessing either a smooth, and in particular, a rifled weapon barrel, which possesses a discardable thrust ring constituted of segments arranged on the central form-fitted component, and of a through-sliding guide band, and which is provided at the tail end of the projectile with a multi-finned stabilizing guidance mechanism which is rotatable about the longitudinal axis of the projectile.

Abstract: The present invention relates to an armor penetrating projectile having a substantial length-to-diameter ratio with a penetrating sabot surrounding the projectile and utilizing a conventional sabot for lauching the projectile. The penetrator of the projectile is provided with means for receiving a material higher in density and having a lower melting point than the material of the penetrated armor for providing lubrication for the penetrator upon impact.

Abstract: A back-actuated forward ignition cartridge having a case, a puller sabot and rod penetrator projectile in the forward mouth end of the case, and a combination compacted propellant solid mass and loose propellant charge ignitable by back ignition through actuation of a rear primer and guided flame propagation through a guide tube extending through the compacted propellant mass and to the vicinity of the loose propellant charge, while preventing ignition of the compacted propellant mass as the flame passes along the tube therethrough. The guide tube has a booster ignition charge therein to assist in forward flame propagation and ignition of the loose propellant. Burning of the loose propellant charge effects pressurized constriction of the sabot about the projectile and drives the sabot/projectile from the case and along a barrel bore, thereby increasing the effective burning volume prior to ignition of the compacted propellant solid mass.

Abstract: The invention concerns a fin-stabilized projectile for employment from a rifled barrel and is particularly suitable for automatic cannons having calibers from 12.7 to 70 millimeters. The full rate of spin commensurate with the rifling twist of a specific barrel and the muzzle velocity is imparted to the projectile during launch using a rotating band which is fixed and an integral component of the discarding sabot. Subsequent to exit from the muzzle of the gun the rate of spin of the projectile is decelerated rapidly by aerodynamic damping to avoid potential adverse effects due to Magnus moments. The aerodynamic design of the fins is such that the projectile spin reaches a steady state rate of spin which is at least 50 percent larger than the nutation frequency of the projectile. By means of this spin tuning resonance instability and roll lock-in are avoided over the operational range of the projectile.

Abstract: A telescoped ammunition round comprises:a propellant charge having an axial cavity for supplying firing power to the ammunition round;a control tube means housed within the aft end of the axial cavity;a booster charge within the axial bore of the control tube, fireable in response to a primer means of the ammunition round in communication therewith; anda sabot/projectile assembly mounted within the axial cavity, its aft end extending into the control tube, wherein the sabot comprises an integral piston at its aft end to receive propulsive forces upon firing of the booster charge of the ammunition round.

Abstract: The invention relates in particular to hunting ammunition for a fire-arm of the kind having a subcaliber bullet fitted with a feathering, the subcaliber bullet allowing for destabilization on its trajectory beyond a distance travelled outside of the fire-arm.

Abstract: To increase the penetration effectiveness, a tip area of the sub-caliber projectile body of a kinetic energy projectile, which immediately follows the possible tip has a greater diameter D over its length L than the diameter d in the following areas of the projectile body.