WO2008142457A2 - Abramyan's method for imparting a rotary motion to a bullet in a firearm barrel channel and a bullet for a smooth-bore hunting arm - Google Patents
Abramyan's method for imparting a rotary motion to a bullet in a firearm barrel channel and a bullet for a smooth-bore hunting arm Download PDFInfo
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- WO2008142457A2 WO2008142457A2 PCT/GE2008/000004 GE2008000004W WO2008142457A2 WO 2008142457 A2 WO2008142457 A2 WO 2008142457A2 GE 2008000004 W GE2008000004 W GE 2008000004W WO 2008142457 A2 WO2008142457 A2 WO 2008142457A2
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- bullet
- small turbine
- working medium
- conical
- head portion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
- F42B10/02—Stabilising arrangements
- F42B10/26—Stabilising arrangements using spin
- F42B10/28—Stabilising arrangements using spin induced by gas action
Definitions
- the present invention relates to an improvement of quality of hunting munitions, particularly to the bullet of a smooth-bore hunting arm, though it can also find application in process of imparting a rotary motion to a bullet of a small-arm and an artillery projectile as well.
- the method is characterized with a drawback in that it cannot be realized at supersonic velocity of a bullet upon which the pressure of compressed air in the exit area of gunpowder gasses, immediately beyond the obturating section of a bullet, exceeds the pressure of gunpowder gasses in.the space behind the projectile.
- the most relevant to one of the subject matters of the present invention is a method for imparting a rotary motion to a bullet in a firearm barrel channel, wherein the bullet is made with a small turbine that modifies the direction of the jet of the working medium passing therethrough, the air existing in the barrel channel ahead of the bullet being utilized as the working medium, the air being directed into a compression chamber by means of the bullet top, being compressed up to the pressure exceeding that of the gunpowder gasses in the space behind the projectile and, upon gaining the supersonic velocity by the bullet, it being passed through the small turbine to the space behind the projectile, thereby developing the reaction forces of the jet and producing the torque applied to the bullet (2) WO 2006/123192 F42B
- the method is characterized with a drawback in that it can be accomplished only after gaining the supersonic velocity by the bullet and can be used in a short barrel arm with a bullet having subsonic initial velocity.
- a bullet for a smooth-bore hunting arm comprising a mushroom like body consisting of a sub-caliber head portion with a lateral cylindrical surface and butt; a wad- stabilizer made with a groove on the front end under the butt of the body, having axial gap and placed therein; an obturator and small turbine made in the form of protrusions on the lateral surface of the wad-stabilizer, wherein the head portion is provided with an annular groove wherein the protrusion of the wad-stabilizer with a collar is partially entered (3)
- the bullet is characterized with a drawback in that the sub-caliber nature of its head portion, insufficient mass and expansivity as well as absence of gyr
- a bullet of a smooth-bore hunting arm comprising a mushroom like body consisting of a lead head portion with a lateral cylindrical surface, with an annular groove on the back end and a butt; a plastic wad - stabilizer made with an obturator, with a protrusion provided at the front end and a groove therein under the body butt partially fixed therein; a support washer in the lead head portion, abutted on the body butt, and a semi covering in the from of a truncated hollow cone resting on the support washer with its smaller base, which, together with the semi covering and the butt, is made as unified member forming a bullet bar.
- the head portion is of a caliber type, provided with a centering girdle and leading ribs on the lateral surface; the annular groove is made up to the support washer and is of conical shape; the wad-stabilizer is provided with a butt consisting of a cylindrical portion extended from the obturator, and a sharpened end; the obturator and the protrusion have conical lateral surface with a constriction toward the back end, and the groove enters in the cylindrical portion of the butt and is provided with longitudinal ribs on the walls, the ribs being increased in height toward the back end of the wad-stabilizer.
- the bullet comprises an aerodynamic needle disposed in an axial through hole of the body and the groove of the wad-stabilizer (4) GE3906, F42B 30/02, 2006.
- the aforementioned bullet is characterized with a drawback in that there is lack of gyroscopic stability after separating the bullet from the muzzle section and, consequently, lower closely-grouping of shots can be obtained as compared with that of the rifle arm.
- Technical result of the present invention is imparting a rotary motion to a bullet in a firearm barrel channel providing gyroscopic stability of the bullet across the flying trajectory; increase in the closely-grouping of shots up to the level of closely-grouping of shots characteristic to a rifle arm, and also, increase in the muzzle velocity of a bullet and reducing of the recoiling and loudness of shooting.
- the essence of the present invention is a method of imparting a rotary motion to a bullet in a firearm barrel channel comprising the steps of:
- the direction of the jet of the working medium being modified by means of a structural member in the form of a channel within the bullet and/or in the form of a curved section of the channel, ribs, channels disposed at an angle to the jet of the working medium, and other kind of a structural member disposed within or on the surface of the bullet; - increasing the velocity of the working medium by making the inlet and outlet channels of the small turbine with different cross section areas, or increasing the velocity of the working medium before modifying its jet, by passing the working medium to the structural member of the small turbine through the channel having variable cross section, and/or through a nozzle.
- the comprises the step of increasing the torque by making the structural member of the small turbine in the form of inclined ribs on the lateral surface of the lead head portion, designed for safe passage of the bullet having cap like head portion through a choke like constriction, and also for imparting a rotary motion to the bullet after leaving the barrel channel.
- a bullet for a smooth-bore hunting arm comprising a mushroom like body consisting of a lead caliber head portion with a flat or convex top; a centering girdle and leading straight or inclined ribs provided on the lateral cylindrical or conical surface; or ribs provided on the cylindrical surface; and rifling grooves; a conical narrowing groove provided on the back end;
- an aerodynamic needle in the form of a cylindrical bar with an annular protrusion at the base, and conical transition region to the cylindrical tip, inserted in a through axial hole of the head portion with a conical constriction at the outlet from the lead body against the stop of the conical transition region to the cylindrical tip; a plastic wad-stabilizer with an obturator, made with a conical lateral surface; annular groove at the back end; a cylindrical butt with a sharpened end extended to the skirt of the obturator; a conical protrusion at the frontal end, mating to the conical groove of the head portion, a groove in the protrusion with an annular protrusion inserted therein with the aerodynamic needle; or a groove in the protrusion, made with longitudinal ribs on the walls, the ribs being increased in height towards the back end of the wad-stabilizer, wherein the cylindrical butt of the body is partially disposed;
- -said conical groove of the head portion and said conical protrusion of the wad-stabilizer are made with a ledge;
- the protrusion up the ledge is made as mating to the conical groove of the head portion up to the ledge, and the protrusion after the ledge belongs to the conical groove;
- diameter of the cylindrical butt is less than that of the bigger base of the truncated cone abutted thereon;
- the truncated cone with its smaller base is inserted in the conical groove after the ledge and fixed to the head portion by means of the lead centre-pops made along the ledge circumference;
- the aerodynamic needle is made with a cylindrical butt abutted to its base, which is made an interference fit in the blind-hole provided in the centre of the groove bottom in the protrusion of the wad-stabilizer; in the conical groove after the ledge, a plastic sleeve is disposed wherein the tip of the aerodynamic needle is inserted against the stop of the conical transition region
- the bullet can be provided with a cap fixed to the tip of the aerodynamic needle.
- the cap is fixed to the tip of the aerodynamic needle after disposing the tip into the axial through hole of the head portion in such a manner as to partially extend from the bullet flat top.
- the obturating section of the bullet lateral surface prevents breaking of the gunpowder gasses through the space between the barrel channel wall and the bullet, and enables to create pressure difference between the front and end parts of the bullet.
- the bullet top by pressing by its surface the compressed air existing in the firearm channel ahead of the bullet to the compression chamber, forces it up to the pressure exceeding that of the gunpowder gasses in the space behind the projectile after gaining the supersonic velocity by the bullet.
- the compression chamber formed between the inner surface of the firearm barrel channel and lateral surface of the bullet, having relatively small volume, is designed for increasing the pressure of the compressed air forced thereinto by the bullet top.
- the compressed air is passed therefrom to the barrel channel zone abutted on the bullet wherein the pressure is less than that in the compression chamber, and/or after gaining the supersonic velocity by the bullet in the space behind the projectile.
- the compression chamber can be made as common for several small turbines, or it can be consisted of individual chambers for each small turbine.
- the nozzles are intended for increasing the velocity of the working medium passing through them to the small turbine channels, and for decreasing the velocity of the other type of the working medium in backward direction in the absence of the fixture which obstructs the back stream of the working medium through a nozzle.
- the shape of the nozzle hole provides increase in the velocity of the jet of the working medium passing through it to the small turbine channels by supersonic or subsonic velocity, and decrease of the velocity of the jet of other type working medium in opposite direction.
- the structural member of the small turbine which is made in the form of channels, grooves, ribs, or other type structural members, arranged at an angle to the jet of the working medium, is designed for changing the jet direction and producing its reaction.
- the bullet small turbine is designed for producing a torque applied to the bullet, and can be consisted of a solely structural member, e.g. ribs, grooves, etc, or of a structural member and auxiliary members supplying thereto and withdrawing therefrom the working medium, e.g. an annular cavity with inlet and outlet channels.
- the bullet can be made with a single or several small turbines.
- the small turbine channels can have common sections designed for entering and emerging the working medium therefrom in a united manner.
- the small turbine channel with variable cross section is used for increasing the velocity of the jet of the working medium.
- the jet velocity is increased and the pressure is decreased at subsonic velocities of the working medium by decreasing the channel cross section, and the same is achieved at supersonic velocities by increasing the channel cross section.
- Passages of the air or moisture through the small turbine channels can be closed both before and after the structural.
- the fixtures which prevent creation of inequilateral torque, play the role of a valve to obstruct breaking of the gunpowder gasses from the space behind the projectile through the barrel channel ahead of the bullet, and the compressed air is passed to the space behind the projectile after going the pressure of the compressed air in the compression chamber over the pressure of the gunpowder gasses.
- the initial velocity of the bullet is considered to be the velocity of it in the moment of leaving the barrel.
- Diagram Ns 2 use of compressed air as a working medium of the small turbine, outwardly moving towards the space behind the projectile;
- Diagram Xe 1 In the instance where gunpowder gasses are used as a working medium of the small turbine, passages 2 are opened during shooting process by use of gunpowder gasses 1 pressure to allow passing of the working medium through the channels 8 of the small turbines, the gunpowder gasses 4 are passed from the space behind the projectile 3 to the small turbine of the bullet through a nozzle 5 or through the small turbine with variable cross section 6, to increase the velocity of gunpowder gasses jet 7.
- Changing of the jet 10 direction is conditioned by a structural member 9 of the small turbine, which is disposed at an angle to the jet or curved channel of the small turbine, or by other type of a structural member, thereby favoring production of reaction forces of the jet 11 and torque 12 applied to the bullet.
- the gunpowder gasses are discharged from the small turbine outlet channel into the airspace of the barrel channel 15 ahead of the bullet, or the gunpowder gasses are discharged into the airspace of the barrel channel at the lateral surface of the bullet.
- the gunpowder gasses are discharged into the airspace of the barrel channel fitting against the bullet, with the exception of the compression chamber 16.
- Diagram j ⁇ ° 2 In the instance where a compressed air 4 is used as a working medium of the small turbine for imparting a rotary motion to a bullet having supersonic initial velocity, the passages 2 are opened during the shooting process by use of the pressure of the gunpowder gasses or compressed air 1, to allow passing of the working medium through the small turbine channels.
- the compressed air 4 is let to the structural member of the small turbine 14 through the nozzle or through the small turbine channel having variable cross section, to increase, thereby, in the velocity of the jet.
- the jet 15 direction is changed, the jet 16 reaction forces and a torque 17 applied to the bullet are produced.
- the compressed air 4 is passed to the space behind the projectile 20 through the outlet channel of the small turbine.
- the method depicted in the diagram N° 2 can be accomplished by: increasing of the torque by changing the jet direction at the small turbine outlet by means of an additional structural member; preventing production of inequilateral torque 19 by making the bullet with fixtures 18 that prevent backward motion of the gunpowder gasses through the channels designed for passing the compressed air 4; and passing the compressed air into the space behind the projectile 20 after gaining the supersonic velocity by the bullet.
- the bullet for a smooth-bore hunting arm can be seen referring to 5 figures, wherein
- Fig. 1 - shows longitudinal section of the bullet with a convex top
- Fig. 2 - shows longitudinal section of the bullet having an aerodynamic needle
- Fig. 3 - shows cross section in A-A of the bullet shown in fig. 1;
- Fig. 4 - shows cross section in B-B of the bullet shown in fig. 1;
- Fig. 5 - shows cross section in A-A of the bullet shown in fig. 2;
- Fig. 6 - shows the longitudinal section of the bullet in the process of being shot.
- the bullet has a mushroom like body consisting of a lead caliber head portion 1 with a flat 2 or convex top 3 having a centering girdle 4 and straight or inclined leading ribs 5 on the lateral cylindrical 6 or conical surface 7, or ribs 5 on the cylindrical surface 6 and rifling grooves 8, with conical constricting groove 9 on the back end changing to conical groove 11 after a ledge
- the bullet having a convex top 3 it comprises a bar 12 which is a cylindrical butt of the body 13; a truncated cone 14 abutted on said bar with greater base and greater diameter, the truncated cone being disposed in the conical groove 11 with its smaller base and fastened to the head portion 1 with a centre-pop of lead about the circumference of a shoulder 10.
- the bullet having flat top 2 it comprises an aerodynamic needle 15 in the form of a cylindrical bar 16 having annual protrusion 17 at the base 18, with cylindrical butt 19 abutted on the base 18, with conical transition region 20 to a cylindrical tip
- a plastic wad-stabilizer 25 having an obturator 26, made with a conical lateral surface 27, an annular groove 28 at the back end, and a cylindrical butt 30 with a sharpened end 31 extended to a skirt 29 of the obturator 26; conical protrusion 32 transformed after a ledge 33 into a conical protrusion at the front end; a groove 35 in the protrusion 34; a blind hole 36 in the centre of the groove 35 bottom, a butt 19 of the aerodynamic needle 15 made an interference fit in the blind hole 36, and in the groove 35 - by its annular protrusion
- a plastic sleeve 39 is made an interference fit in the conical groove 11, wherein a tip 21 of the aerodynamic needle 15 is made an interference fit against the stop of the conical transition region 20; between the centering girdle 4 and at least the part of the ribs 5 on the head portion 1, a break 40 is provided; the bullet is provided with a small turbine consisting of inlet through holes (channels) 42 arranged on the break 40 at the base of the centering girdle 4; a structural member 43 in the form of a section of the interior surface of the groove 9 with holes arranged thereon 42; and outlet through holes (channels) 44 in the wad-stabilizer 25 from the ledge 33 up to the annular groove 28; diameter of the hole 44 exceeds that of the hole 42; a ringlet
- the bullet acts in the following manner: In the beginning of discharging the wad-stabilizer 25 is displaced forward under the action of gunpowder gasses, fits on the butt of the body 13 against the stop to increase the volume of the combustion chamber and, thereby, to reduce the maximum pressure of the gunpowder gasses in the cartridge. This time the bullet body and wad-stabilizer 25 are centered with respect to the bullet longitudinal axis.
- the longitudinal ribs 38 provided on the walls of the wad-stabilizer 25 groove 37 counteract fitting of the wad-stabilizer onto the butt body 13 so as to create shock- absorption.
- the ribs 38 being strongly contracted, tightly retain the wad-stabilizer 25 on the butt 13.
- the bullet In the instance where the bullet is provided with the aerodynamic needle 15, it is displaced in forward direction together with the wad-stabilizer 25, presses the sleeve 39, and conical constriction 23 of the lead head portion 1 by means of the conical transition region 20, partially pressing it out. This time the cylindrical tip 21 of the aerodynamic needle 15 extends from of flat top 2 of the bullet.
- the lead body 24 of the bullet with a gap passes through the muzzle constriction. This time the centering girdle 4 and inclined ribs 5 on the bullet head portion partially crush so that the head portion diameter is decreased. This time, diameter of the wad-stabilizer 25 cross section goes over the diameter of the lead head portion 1 to increase the bullet stability across the flying trajectory.
- the inclined ribs 5 on the head portion 1 impart additional rotary motion to the bullet from the opposite stream of the air, while the rifling grooves 8 and the groove with an inclined bottom on the head portion enhance the bullet rotation.
- the tip 21 of the aerodynamic needle significantly decreases the frontal resistance of the air during the flying with supersonic velocity, while the butt 30 of the wad-stabilizer 25 performs the same function at subsonic velocities.
- This kind of aerodynamic shape of the bullet allows to inhibit the process of decreasing the bullet velocity across the flying trajectory.
- the bullet diameter increases, which is favored by the cap like shape of the head portion.
- the rifling grooves provided on the lateral surface enhance expansiveness.
- the wad-stabilizer is not removable from the bar butt and is capable of penetrating into the animal's body, significantly increasing the diameter of the wound channel.
- Gaining of the rotary motion in the barrel channel and gyroscopic stability across the flying trajectory by the bullet was established by experiments. Comparative shooting of bullet cartridge was performed by the smooth- bore hunting arm IZH -18.
- the lead bullets had similar aerodynamic shapes while differed by presence and absence of the small turbines.
- the closely- grouping character of the battle was 14 cm. without the small turbine, and - 8 cm. in the presence of the small turbine, at the distance of 100 m.
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Abstract
The present invention aims at improving the quality of hunting ammunition and particularly the bullets for a smooth-bore arm, while it can find application for imparting a rotary motion to a bullet of a shooting arm and artillery projectile as well. A method for imparting a rotary motion to a bullet in a firearm barrel channel, wherein, in the discharging process, a gaseous working medium is passed through the bullet provided with a small turbine; direction of the jet of the working medium is modified by means of a structural member of the small turbine so that the jet reaction forces and a torque applied to the bullet are produced. Before discharging, tightness of the gunpowder gasses is provided in the bullet cartridge. As a working medium of the small turbine, gunpowder gasses passing from the space behind the projectile to the barrel channel ahead of the bullet through the small turbine are used, and/or the air compressed by the bullet in the barrel channel is directed to a compression chamber created in the discharging process ahead of the obturating section between the lateral surface of the reduced diameter section of the bullet and the wall of the barrel channel. Next, it is forced and after gaining the supersonic velocity by the bullet and compressing up to the pressure exceeding that of the gunpowder gasses, it is passed to the space behind the projectile through the small turbine, and/or the compressed air, despite the bullet velocity, is passed from the compression chamber to the barrel channel ahead of the bullet through the small turbine. The present invention provides rotary motion of a bullet in the barrel channel and its gyroscopic stability immediately after leaving the barrel, closely-grouping of shots up to the level characteristic to a rifle as well as increase in the bullet initial velocity, decrease of recoiling and loudness of shooting. The present method of imparting a rotary motion to a bullet in a firearm barrel channel providing passage of the compressed air to the space behind the projectile through a small turbine is performed in a bullet for a smooth-bore hunting arm made as caliber with the lead head portion, inclined leading ribs provided on the head portion, with a convex or flat top and an aerodynamic needle in the embodiment with the flat top, a wad stabilizer and a small turbine. Closely-grouping does not exceed 8 cm. at the distance of 100 m.
Description
Abramyan's Method for Imparting a Rotary Motion to a Bullet in a Firearm Barrel Channel and a Bullet for a Smooth-bore Hunting Arm
The present invention relates to an improvement of quality of hunting munitions, particularly to the bullet of a smooth-bore hunting arm, though it can also find application in process of imparting a rotary motion to a bullet of a small-arm and an artillery projectile as well. Known in the art is a method for imparting a rotary motion to a bullet in a smooth-bore arm channel, wherein the bullet having an obturator is made with inlet holes at the bottom portion, and outlet holes on the lateral surface ahead of the obturating section, the inlet and outlet holes being connected to each other by means of channels made in the bullet in such a manner as to form a small turbine through which jet of the gunpowder gasses changes direction so that torque is developed (1) French application FR2487083, 1981.
The method is characterized with a drawback in that it cannot be realized at supersonic velocity of a bullet upon which the pressure of compressed air in the exit area of gunpowder gasses, immediately beyond the obturating section of a bullet, exceeds the pressure of gunpowder gasses in.the space behind the projectile.
The most relevant to one of the subject matters of the present invention (method) is a method for imparting a rotary motion to a bullet in a firearm barrel channel, wherein the bullet is made with a small turbine that modifies the direction of the jet of the working medium passing therethrough, the air existing in the barrel channel ahead of the bullet being utilized as the working medium, the air being directed into a compression chamber by means of the bullet top, being compressed up to the pressure exceeding that of the gunpowder gasses in the space behind the projectile and, upon gaining the supersonic velocity by the bullet, it being passed through the small turbine to the space behind the projectile, thereby developing the reaction forces of the jet and producing the torque applied to the bullet (2) WO 2006/123192 F42B
7/10, 2006.
The method is characterized with a drawback in that it can be accomplished only after gaining the supersonic velocity by the bullet and can be used in a short barrel arm with a bullet having subsonic initial velocity. Still, known in the art is a bullet for a smooth-bore hunting arm, comprising a mushroom like body consisting of a sub-caliber head portion with a lateral cylindrical surface and butt; a wad- stabilizer made with a groove on the front end under the butt of the body, having axial gap and placed therein; an obturator and small turbine made in the form of protrusions on the lateral surface of the wad-stabilizer, wherein the head portion is provided with an annular groove wherein the protrusion of the wad-stabilizer with a collar is partially entered (3) Author's certificate of USSR SUl 141293, F42B 11/02, 1983.
The bullet is characterized with a drawback in that the sub-caliber nature of its head portion, insufficient mass and expansivity as well as absence of gyroscopic stability in the moment of separation from the muzzle cut decreases the closely-grouping of shots.
The most relevant to the one of the subject matters of the present invention (device) is a bullet of a smooth-bore hunting arm, comprising a mushroom like body consisting of a lead head portion with a lateral cylindrical surface, with an annular groove on the back end and a butt; a plastic wad - stabilizer made with an obturator, with a protrusion provided at the front end and a groove therein under the body butt partially fixed therein; a support washer in the lead head portion, abutted on the body butt, and a semi covering in the from of a truncated hollow cone resting on the support washer with its smaller base, which, together with the semi covering and the butt, is made as unified member forming a bullet bar. The head portion is of a caliber type, provided with a centering girdle and leading ribs on the lateral surface; the annular groove is made up to the support washer and is of conical shape; the wad-stabilizer is provided with a butt consisting of a cylindrical portion extended from the obturator, and a sharpened end; the obturator and the protrusion have conical lateral surface with a constriction toward the back end, and the groove enters in the cylindrical portion of the butt and is provided with longitudinal ribs on the walls, the ribs being increased in height toward the back end of the wad-stabilizer. In the embodiment with the flat top, the bullet comprises an aerodynamic needle disposed in an axial through hole of the body and the groove of the wad-stabilizer (4) GE3906, F42B 30/02, 2006.
The aforementioned bullet is characterized with a drawback in that there is lack of gyroscopic stability after separating the bullet from the muzzle section and, consequently, lower closely-grouping of shots can be obtained as compared with that of the rifle arm. Technical result of the present invention is imparting a rotary motion to a bullet in a firearm barrel channel providing gyroscopic stability of the bullet across the flying trajectory; increase in the closely-grouping of shots up to the level of closely-grouping of shots characteristic to a rifle arm, and also, increase in the muzzle velocity of a bullet and reducing of the recoiling and loudness of shooting.
The essence of the present invention is a method of imparting a rotary motion to a bullet in a firearm barrel channel comprising the steps of:
- In the discharging process, passing gaseous working medium, for example, compressed air, through the bullet provided with small turbines comprising a structural member that modifies the direction of the jet of the working medium, from a zone of higher pressure to the zone of lower pressure, i.e. from the barrel channel region ahead of the bullet to the space behind the projectile, to modify the direction of the jet of the working medium;
- providing creation of the reaction forces of the jet and production of torque applied to the bullet, for the purpose of which the air is forced into a cavity created between the lateral surface of the bullet ahead of the obturating section and the wall of firearm barrel channel by means of the bullet top, the cavity being utilized as a compression chamber; - upon gaining the supersonic velocity by the bullet and its compressing up to the pressure exceeding that of the gunpowder gasses in the space behind the projectile, passing the compressed air to the space behind the projectile through a small turbine provided with a structural member in the form of a channel and disposed within the bullet at an angle to the jet of the working medium; - increasing the velocity of the working medium by making the inlet and outlet channels in the small turbine with different cross sections, the direction of the jet of the working medium being modified after entering into the small turbine and/or emerging therefrom, or production of inequilateral torque is prevented by providing the ballet with a gadget preventing breaking of the gunpowder gasses from the space behind the projectile to the compression chamber through the small turbine and passing the compressed air to the space behind the projectile after gaining the supersonic velocity by the bullet;
- before the discharging moment, providing tightness of the gunpowder charge in the bullet cartridge by closing the passage of the air or moisture to the space behind the projectile through the small turbine channels; - in the process of discharging, by means of the pressure of gunpowder gasses and compressed air, passing the working medium through the small turbine channels, compressed air and/or gunpowder gasses being utilized as the working medium before and after gaining the supersonic velocity by the bullet;
- at the supersonic initial velocity of the bullet, passing the compressed air to the space behind the projectile and/or passing the compressed air and/or gunpowder gasses to the barrel channel zone abutted on the bullet with the exception of the compression chamber region through an additional small turbine and outlet channels in the bullet head portion;
- at the subsonic initial velocity of the bullet, passing the compressed air to the zone of the barrel channel with the aforementioned limitation, and passing the gunpowder gasses without the aforementioned limitation, wherein the direction of the jet of the working medium being modified by means of a structural member in the form of a channel within the bullet and/or in the form of a curved section of the channel, ribs, channels disposed at an angle to the jet of the working medium, and other kind of a structural member disposed within or on the surface of the bullet;
- increasing the velocity of the working medium by making the inlet and outlet channels of the small turbine with different cross section areas, or increasing the velocity of the working medium before modifying its jet, by passing the working medium to the structural member of the small turbine through the channel having variable cross section, and/or through a nozzle. In utilizing the compressed air as the working medium for the small turbine, the comprises the step of increasing the torque by making the structural member of the small turbine in the form of inclined ribs on the lateral surface of the lead head portion, designed for safe passage of the bullet having cap like head portion through a choke like constriction, and also for imparting a rotary motion to the bullet after leaving the barrel channel. A bullet for a smooth-bore hunting arm, comprising a mushroom like body consisting of a lead caliber head portion with a flat or convex top; a centering girdle and leading straight or inclined ribs provided on the lateral cylindrical or conical surface; or ribs provided on the cylindrical surface; and rifling grooves; a conical narrowing groove provided on the back end;
- in the embodiment of the bullet having a convex top, a bar in the form of a cylindrical butt of the body with a truncated cone abutted thereon; or
- in the embodiment of the bullet having a flat top, an aerodynamic needle in the form of a cylindrical bar with an annular protrusion at the base, and conical transition region to the cylindrical tip, inserted in a through axial hole of the head portion with a conical constriction at the outlet from the lead body against the stop of the conical transition region to the cylindrical tip; a plastic wad-stabilizer with an obturator, made with a conical lateral surface; annular groove at the back end; a cylindrical butt with a sharpened end extended to the skirt of the obturator; a conical protrusion at the frontal end, mating to the conical groove of the head portion, a groove in the protrusion with an annular protrusion inserted therein with the aerodynamic needle; or a groove in the protrusion, made with longitudinal ribs on the walls, the ribs being increased in height towards the back end of the wad-stabilizer, wherein the cylindrical butt of the body is partially disposed;
-said conical groove of the head portion and said conical protrusion of the wad-stabilizer are made with a ledge; the protrusion up the ledge is made as mating to the conical groove of the head portion up to the ledge, and the protrusion after the ledge belongs to the conical groove; diameter of the cylindrical butt is less than that of the bigger base of the truncated cone abutted thereon; the truncated cone with its smaller base is inserted in the conical groove after the ledge and fixed to the head portion by means of the lead centre-pops made along the ledge circumference; the aerodynamic needle is made with a cylindrical butt abutted to its base, which is made an interference fit in the blind-hole provided in the centre of the groove bottom in the protrusion of the wad-stabilizer; in the conical groove after the ledge, a plastic sleeve is
disposed wherein the tip of the aerodynamic needle is inserted against the stop of the conical transition region; between the centering girdle and at least part of the ribs on the head portion, a break is provided; the bullet is provided with a small turbine consisting of a structural member in the form of a section of an internal surface of the groove up to the ledge with holes arranged thereon, and outlet through holes (channels) in the wad-stabilizer from the ledge to the annular groove disposed at the base of the centering girdle at the break of the inlet through holes (channels) contacting the conical surface of the groove; diameter of the outlet through holes exceeding that of the inlet holes; a ringlet fit on the cylindrical portion of the bar or the aerodynamic needle is made an interference fit in the conical groove up to the ledge, which covers the inlet holes of the small turbine by its lateral surface.
The bullet can be provided with a cap fixed to the tip of the aerodynamic needle.
The cap is fixed to the tip of the aerodynamic needle after disposing the tip into the axial through hole of the head portion in such a manner as to partially extend from the bullet flat top.
The obturating section of the bullet lateral surface prevents breaking of the gunpowder gasses through the space between the barrel channel wall and the bullet, and enables to create pressure difference between the front and end parts of the bullet.
The bullet top, by pressing by its surface the compressed air existing in the firearm channel ahead of the bullet to the compression chamber, forces it up to the pressure exceeding that of the gunpowder gasses in the space behind the projectile after gaining the supersonic velocity by the bullet.
The compression chamber formed between the inner surface of the firearm barrel channel and lateral surface of the bullet, having relatively small volume, is designed for increasing the pressure of the compressed air forced thereinto by the bullet top. The compressed air is passed therefrom to the barrel channel zone abutted on the bullet wherein the pressure is less than that in the compression chamber, and/or after gaining the supersonic velocity by the bullet in the space behind the projectile. The compression chamber can be made as common for several small turbines, or it can be consisted of individual chambers for each small turbine.
The nozzles are intended for increasing the velocity of the working medium passing through them to the small turbine channels, and for decreasing the velocity of the other type of the working medium in backward direction in the absence of the fixture which obstructs the back stream of the working medium through a nozzle. The shape of the nozzle hole provides increase in the velocity of the jet of the working medium passing through it to the small turbine channels by supersonic or subsonic velocity, and decrease of the velocity of the jet of other type working medium in opposite direction.
The structural member of the small turbine which is made in the form of channels, grooves, ribs, or other type structural members, arranged at an angle to the jet of the working medium, is designed for changing the jet direction and producing its reaction.
The bullet small turbine is designed for producing a torque applied to the bullet, and can be consisted of a solely structural member, e.g. ribs, grooves, etc, or of a structural member and auxiliary members supplying thereto and withdrawing therefrom the working medium, e.g. an annular cavity with inlet and outlet channels. The bullet can be made with a single or several small turbines. The small turbine channels can have common sections designed for entering and emerging the working medium therefrom in a united manner. The small turbine channel with variable cross section is used for increasing the velocity of the jet of the working medium. The jet velocity is increased and the pressure is decreased at subsonic velocities of the working medium by decreasing the channel cross section, and the same is achieved at supersonic velocities by increasing the channel cross section.
Passages of the air or moisture through the small turbine channels can be closed both before and after the structural.
The fixtures, which prevent creation of inequilateral torque, play the role of a valve to obstruct breaking of the gunpowder gasses from the space behind the projectile through the barrel channel ahead of the bullet, and the compressed air is passed to the space behind the projectile after going the pressure of the compressed air in the compression chamber over the pressure of the gunpowder gasses.
The initial velocity of the bullet is considered to be the velocity of it in the moment of leaving the barrel.
The present method can be understood referring to the diagrams consisting of names of sequential steps which follow by use of a bullet having the following members: Diagram N° 1 - use of gunpowder gasses as a working medium of the small turbine;
Diagram Ns 2 — use of compressed air as a working medium of the small turbine, outwardly moving towards the space behind the projectile;
Diagram JN° 3 - use of compressed air as a working medium of the small turbine, outwardly moving to the barrel channel ahead of the bullet. The present method is accomplished in the following manner:
Diagram Xe 1. In the instance where gunpowder gasses are used as a working medium of the small turbine, passages 2 are opened during shooting process by use of gunpowder gasses 1 pressure to allow passing of the working medium through the channels 8 of the small turbines, the gunpowder gasses 4 are passed from the space behind the projectile 3 to the small turbine of the bullet through a nozzle 5 or through the small turbine with variable cross section 6, to
increase the velocity of gunpowder gasses jet 7. Changing of the jet 10 direction is conditioned by a structural member 9 of the small turbine, which is disposed at an angle to the jet or curved channel of the small turbine, or by other type of a structural member, thereby favoring production of reaction forces of the jet 11 and torque 12 applied to the bullet. At the subsonic initial velocity of the bullet 13, the gunpowder gasses are discharged from the small turbine outlet channel into the airspace of the barrel channel 15 ahead of the bullet, or the gunpowder gasses are discharged into the airspace of the barrel channel at the lateral surface of the bullet. At the supersonic initial velocity of the bullet, the gunpowder gasses are discharged into the airspace of the barrel channel fitting against the bullet, with the exception of the compression chamber 16.
Diagram j\° 2. In the instance where a compressed air 4 is used as a working medium of the small turbine for imparting a rotary motion to a bullet having supersonic initial velocity, the passages 2 are opened during the shooting process by use of the pressure of the gunpowder gasses or compressed air 1, to allow passing of the working medium through the small turbine channels. In the instance where the bullet is made with a structural member in the form of inclined ribs on the lateral surface of the head portion 7, direction of the air jet is changed to produce torque 8 applied to the bullet, the compressed air 4 is let from the air space of the barrel channel 3 to the compression chamber 9 through the structural member 7, forcing 6 thereof is provided, and, after gaining the supersonic velocity by the bullet and compressing the air up to the pressure exceeding that of the gunpowder gasses in the space behind the projectile
20, the compressed air 4 is let to the structural member of the small turbine 14 through the nozzle or through the small turbine channel having variable cross section, to increase, thereby, in the velocity of the jet.
By means of the structural member of the small turbine, the jet 15 direction is changed, the jet 16 reaction forces and a torque 17 applied to the bullet are produced.
The compressed air 4 is passed to the space behind the projectile 20 through the outlet channel of the small turbine.
The method depicted in the diagram N° 2 can be accomplished by: increasing of the torque by changing the jet direction at the small turbine outlet by means of an additional structural member; preventing production of inequilateral torque 19 by making the bullet with fixtures 18 that prevent backward motion of the gunpowder gasses through the channels designed for passing the compressed air 4; and passing the compressed air into the space behind the projectile 20 after gaining the supersonic velocity by the bullet.
Diagram N° 3. In the instance where the compressed air 2 is used as a working medium of the small turbine for imparting a rotary motion to bullets having subsonic and supersonic initial
velocities in entering the compressed air into the barrel channel ahead of the bullet, by making the bullet with a structural member in the form of the ribs on the lateral surface of he head portion 5, the direction of the air jet 6 is changed to produce the torque 7 applied to the bullet. The compressed air 2 is let to the compression chamber 8 by means of the bullet 3 top to provide forcing 3 thereof, and is let to the structural member 13 through the nozzle 9 or through the small turbine channel with variable cross section 10 to increase the jet 11 velocity, to provide thereby change of the jet 14 direction, production of the jet 15 reaction and the torque 16 applied to the bullet. The compressed air is let to the airspace in the barrel channel ahead of the bullet through the outlet channels 12 of the small turbines and through the unified central channel in the bullet head portion, with the exception of the compression chamber 17.
By accomplishing the present method with passing the compressed air from the small turbine to the airspace in the barrel channel ahead of the bullet, movement of the compressed air through the small turbine is initiated at the subsonic velocity of the bullet, not depending on the pressure in the space behind the projectile. hi the instance where the gunpowder gasses and compressed air are used together as a working medium of the small turbines, the torque is produced by allowing the gunpowder gasses operation to overlap with that of the compressed air according to diagrams no 1, 2 and 3.
Fig. 1 - shows longitudinal section of the bullet with a convex top;
Fig. 2 - shows longitudinal section of the bullet having an aerodynamic needle;
Fig. 3 - shows cross section in A-A of the bullet shown in fig. 1; Fig. 4 - shows cross section in B-B of the bullet shown in fig. 1;
Fig. 5 - shows cross section in A-A of the bullet shown in fig. 2;
Fig. 6 - shows the longitudinal section of the bullet in the process of being shot.
The bullet has a mushroom like body consisting of a lead caliber head portion 1 with a flat 2 or convex top 3 having a centering girdle 4 and straight or inclined leading ribs 5 on the lateral cylindrical 6 or conical surface 7, or ribs 5 on the cylindrical surface 6 and rifling grooves 8, with conical constricting groove 9 on the back end changing to conical groove 11 after a ledge
10. In the embodiment of the bullet having a convex top 3, it comprises a bar 12 which is a cylindrical butt of the body 13; a truncated cone 14 abutted on said bar with greater base and greater diameter, the truncated cone being disposed in the conical groove 11 with its smaller base and fastened to the head portion 1 with a centre-pop of lead about the circumference of a shoulder 10. In the embodiment of the bullet having flat top 2, it comprises an aerodynamic needle 15 in the form of a cylindrical bar 16 having annual protrusion 17 at the base 18, with cylindrical butt 19 abutted on the base 18, with conical transition region 20 to a cylindrical tip
21 inserted in a axial through hole 22 of the head portion 1 having a conical constriction 23 at the exit from a lead body 24; a plastic wad-stabilizer 25 having an obturator 26, made with a conical lateral surface 27, an annular groove 28 at the back end, and a cylindrical butt 30 with a sharpened end 31 extended to a skirt 29 of the obturator 26; conical protrusion 32 transformed after a ledge 33 into a conical protrusion at the front end; a groove 35 in the protrusion 34; a blind hole 36 in the centre of the groove 35 bottom, a butt 19 of the aerodynamic needle 15 made an interference fit in the blind hole 36, and in the groove 35 - by its annular protrusion
17; or a groove 37 in the protrusion 34 made with longitudinal ribs 38 on the walls, the ribs being increased in height toward the back end of the wad-stabilizer 25 wherein the cylindrical butt of the body 13 is partially disposed; a plastic sleeve 39 is made an interference fit in the conical groove 11, wherein a tip 21 of the aerodynamic needle 15 is made an interference fit against the stop of the conical transition region 20; between the centering girdle 4 and at least the part of the ribs 5 on the head portion 1, a break 40 is provided; the bullet is provided with a small turbine consisting of inlet through holes (channels) 42 arranged on the break 40 at the base of the centering girdle 4; a structural member 43 in the form of a section of the interior surface of the groove 9 with holes arranged thereon 42; and outlet through holes (channels) 44 in the wad-stabilizer 25 from the ledge 33 up to the annular groove 28; diameter of the hole 44
exceeds that of the hole 42; a ringlet 45 fit on the cylindrical portion of the bar 12 of the aerodynamic needle 15 is made an interference fit in the conical groove 9, which covers the inlet hole 42 of the small turbine 41 by its lateral surface. The bullet acts in the following manner: In the beginning of discharging the wad-stabilizer 25 is displaced forward under the action of gunpowder gasses, fits on the butt of the body 13 against the stop to increase the volume of the combustion chamber and, thereby, to reduce the maximum pressure of the gunpowder gasses in the cartridge. This time the bullet body and wad-stabilizer 25 are centered with respect to the bullet longitudinal axis. The longitudinal ribs 38 provided on the walls of the wad-stabilizer 25 groove 37 counteract fitting of the wad-stabilizer onto the butt body 13 so as to create shock- absorption. The ribs 38, being strongly contracted, tightly retain the wad-stabilizer 25 on the butt 13. This time the diameter of the wad-stabilizer increases in the section between the obturator 26 and protrusion 34. At the same time, the conical protrusion 32 of the wad- stabilizer is pulled into the conical groove 9 of the head portion, wherein the conical protrusion on the end 34 displaces the ringlet 45 to the ledge 10. Between the conical surface of the groove 9 and lateral conical surface of the protrusion 34, an annular cavity 46 provided with inlet 42 and outlet holes (channels) 44 is created so as to open the passage from the barrel channel ahead of the bullet to the space behind the projectile. In the instance where the bullet is provided with the aerodynamic needle 15, it is displaced in forward direction together with the wad-stabilizer 25, presses the sleeve 39, and conical constriction 23 of the lead head portion 1 by means of the conical transition region 20, partially pressing it out. This time the cylindrical tip 21 of the aerodynamic needle 15 extends from of flat top 2 of the bullet.
At the initial moment of discharging, during the speeding up process, only a negligible amount of gunpowder gasses can be broken through the small turbine. However, the inertia force of the bullet mass, its strong fixation in the cartridge shell, and decrease of the velocity of gunpowder gasses due to difference between the cross sections of inlet 42 and outlet channels 44 of the small turbine 41 obstruct creation of a torque.
From the point of displacement of the bullet along the barrel, the air is compressed in the barrel channel ahead of the bullet. From the point where the bullet gains supersonic velocity, compression intensity is dramatically increased. At the border layer abutted on the bullet, wherein the motion of air particles change from the bullet velocity to zero, vibrational motion of the air particles created by collision of air with the bullet produces sound waves which are not capable of overtaking the bullet and, instead, run on one another to form the strongly compressed air - ballistic wave. This border layer of air is displaced through the grooves between the ribs at the bullet head portion from the moment when the bullet gains supersonic
velocity and before leaving the barrel, to the direction of the centering girdle 4 and break 40, wherein the space between the later and the wall of the barrel channel forms the compression chamber 46.
Forcing of the compressed air into the compression chamber 46 and increase in its pressure occurs in parallel with the pressure drop of gunpowder gassed in the space behind the projectile. When the air pressure in the compression chamber 46 goes over the pressure of gunpowder gasses, the compressed air is let through the inlet holes 42 of the small turbine 41 to the annular cavity 47. The later, being a structural member, changes the jet direction therein, and the jet exits the outlet holes 44 of the small turbine to enter the space behind the projectile. This time the jet reaction is generated and a torque applied to the bullet is produced.
In the process of increasing in the bullet velocity and volume of the space behind the projectile, difference between the pressures in the compression chamber 46 and the space behind the projectile continuously increases, the torque increases and the bullet gains rotary motion in the firearm channel as well as gyroscopic stability immediately after leaving the channel. Together with the displacement of the compressed air in the space behind the projectile, the inclined ribs 5 on the lateral cylindrical 6 or the conical surface 7 of the lead head portion 1 change the direction of the jet displacing in the grooves between the ribs in the compressed chamber 46 so as to generate the jet reaction and, consequently, increase in the torque. Displacement of the air existing ahead of the bullet to the space behind the projectile causes decrease of its resistance to the bullet motion; increase the bullet initial velocity at leaving the barrel and decrease of the firearm recoil and loudness of shooting.
The lead body 24 of the bullet with a gap passes through the muzzle constriction. This time the centering girdle 4 and inclined ribs 5 on the bullet head portion partially crush so that the head portion diameter is decreased. This time, diameter of the wad-stabilizer 25 cross section goes over the diameter of the lead head portion 1 to increase the bullet stability across the flying trajectory. The inclined ribs 5 on the head portion 1 impart additional rotary motion to the bullet from the opposite stream of the air, while the rifling grooves 8 and the groove with an inclined bottom on the head portion enhance the bullet rotation. The tip 21 of the aerodynamic needle significantly decreases the frontal resistance of the air during the flying with supersonic velocity, while the butt 30 of the wad-stabilizer 25 performs the same function at subsonic velocities.
This kind of aerodynamic shape of the bullet allows to inhibit the process of decreasing the bullet velocity across the flying trajectory.
At hitting the target, the bullet diameter increases, which is favored by the cap like shape of the head portion. The rifling grooves provided on the lateral surface enhance expansiveness. The wad-stabilizer is not removable from the bar butt and is capable of penetrating into the animal's body, significantly increasing the diameter of the wound channel. Gaining of the rotary motion in the barrel channel and gyroscopic stability across the flying trajectory by the bullet was established by experiments. Comparative shooting of bullet cartridge was performed by the smooth- bore hunting arm IZH -18. The lead bullets had similar aerodynamic shapes while differed by presence and absence of the small turbines. The closely- grouping character of the battle was 14 cm. without the small turbine, and - 8 cm. in the presence of the small turbine, at the distance of 100 m.
Increase in the closely-grouping of battle approves the fact of gaining the rotary motion by the bullet in the firearm barrel channel.
Claims
1. A method for imparting a rotary motion to a bullet in a firearm barrel channel, comprising:
- hi the discharging process, passing gaseous working medium, for example, compressed air, through the bullet provided with small turbines comprising a structural member that modifies the direction of the jet of the working medium, from a zone of higher pressure to the zone of lower pressure, i.e. from the barrel channel region ahead of the bullet to the space behind the projectile, to modify the direction of the jet of the working medium;
- providing creation of the reaction forces of the jet and production of torque applied to the bullet, for the purpose of which the air is forced into a cavity created between the lateral surface of the bullet ahead of the obturating section and the wall of firearm barrel channel by means of the bullet top, the cavity being utilized as a compression chamber;
- upon gaining the supersonic velocity by the bullet and its compressing up to the pressure exceeding that of the gunpowder gasses in the space behind the projectile, passing the compressed air to the space behind the projectile through a small turbine provided with a structural member in the form of a channel and disposed within the bullet at an angle to the jet of the working medium;
- increasing the velocity of the working medium by making the inlet and outlet channels in the small turbine with different cross sections, the direction of the jet of the working medium being modified after entering into the small turbine and/or emerging therefrom, or production of inequilateral torque is prevented by providing the ballet with a gadget preventing breaking of the gunpowder gasses from the space behind the projectile to the compression chamber through the small turbine and passing the compressed air to the space behind the projectile after gaining the supersonic velocity by the bullet, characterized in that it comprises:
- before the discharging moment, providing tightness of the gunpowder charge in the bullet cartridge by closing the passage of the air or moisture to the space behind the projectile through the small turbine channels;
- in the process of discharging, by means of the pressure of gunpowder gasses and compressed air, passing the working medium through the small turbine channels, compressed air and/or gunpowder gasses being utilized as the working medium before and after gaining the supersonic velocity by the bullet;
- at the supersonic initial velocity of the bullet, passing the compressed air to the space behind the projectile and/or passing the compressed air and/or gunpowder gasses to the barrel channel zone abutted on the bullet with the exception of the compression chamber region through an additional small turbine and outlet channels in the bullet head portion; - at the subsonic initial velocity of the bullet, passing the compressed air to the zone of the barrel channel with the aforementioned limitation, and passing the gunpowder gasses without the aforementioned limitation, wherein the direction of the jet of the working medium being modified by means of a structural member in the form of a channel within the bullet and/or in the form of a curved section of the channel, ribs, channels disposed at an angle to the jet of the working medium, and other kind of a structural member disposed within or on the surface of the bullet;
- increasing the velocity of the working medium by making the inlet and outlet channels of the small turbine with different cross section areas, or increasing the velocity of the working medium before modifying its jet, by passing the working medium to the structural member of the small turbine through the channel having variable cross section, and/or through a nozzle.
2. A method in accordance with claim 1, characterized in that in utilizing the compressed air as the working medium for the small turbine, it comprises the step of increasing the torque by making the structural member of the small turbine in the form of inclined ribs on the lateral surface of the lead head portion, designed for safe passage of the bullet having cap like head portion through a choke like constriction, and also for imparting a rotary motion to the bullet after leaving the barrel channel.
3. A bullet for a smooth-bore hunting arm, comprising a mushroom like body consisting of a lead caliber head portion with a flat or convex top; a centering girdle and leading straight or inclined ribs provided on the lateral cylindrical or conical surface; or ribs provided on the cylindrical surface; and rifling grooves; a conical narrowing groove provided on the back end;
- in the embodiment of the bullet having a convex top, a bar in the form of a cylindrical butt of the body with a truncated cone abutted thereon; or
- in the embodiment of the bullet having a flat top, an aerodynamic needle in the form of a cylindrical bar with an annular protrusion at the base, and conical transition region to the cylindrical tip, inserted in a through axial hole of the head portion with a conical constriction at the outlet from the lead body against the stop of the conical transition region to the cylindrical tip; a plastic wad-stabilizer with an obturator, made with a conical lateral surface; annular groove at the back end; a cylindrical butt with a sharpened end extended to the skirt of the obturator; a conical protrusion at the frontal end, mating to the conical groove of the head portion, a groove in the protrusion with an annular protrusion inserted therein with the aerodynamic needle; or a groove in the protrusion, made with longitudinal ribs on the walls, the ribs being increased in height towards the back end of the wad-stabilizer, wherein the cylindrical butt of the body is partially disposed, characterized in that
-said conical groove of the head portion and said conical protrusion of the wad-stabilizer are made with a ledge; the protrusion up the ledge is made as mating to the conical groove of the head portion up to the ledge, and the protrusion after the ledge belongs to the conical groove; diameter of the cylindrical butt is less than that of the bigger base of the truncated cone abutted thereon; the truncated cone with its smaller base is inserted in the conical groove after the ledge and fixed to the head portion by means of the lead centre-pops made along the ledge circumference; the aerodynamic needle is made with a cylindrical butt abutted to its base, which is made an interference fit in the blind-hole provided in the centre of the groove bottom in the protrusion of the wad-stabilizer; in the conical groove after the ledge, a plastic sleeve is disposed wherein the tip of the aerodynamic needle is inserted against the stop of the conical transition region; between the centering girdle and at least part of the ribs on the head portion, a break is provided; the bullet is provided with a small turbine consisting of a structural member in the form of a section of an internal surface of the groove up to the ledge with holes arranged thereon, and outlet through holes (channels) in the wad-stabilizer from the ledge to the annular groove disposed at the base of the centering girdle at the break of the inlet through holes (channels) contacting the conical surface of the groove; diameter of the outlet through holes exceeding that of the inlet holes; a ringlet fit on the cylindrical portion of the bar or the aerodynamic needle is made an interference fit in the conical groove up to the ledge, which covers the inlet holes of the small turbine by its lateral surface.
4. A bullet in accordance with claim 3, characterized in that it is provided with a cap fixed to the tip of the aerodynamic needle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GEAP2007010074 | 2007-05-18 | ||
| GEAP2007010074 | 2007-05-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2008142457A2 true WO2008142457A2 (en) | 2008-11-27 |
| WO2008142457A3 WO2008142457A3 (en) | 2009-01-15 |
Family
ID=39929571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/GE2008/000004 Ceased WO2008142457A2 (en) | 2007-05-18 | 2008-05-16 | Abramyan's method for imparting a rotary motion to a bullet in a firearm barrel channel and a bullet for a smooth-bore hunting arm |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2008142457A2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3029412A1 (en) * | 2014-12-05 | 2016-06-08 | Thales | Projectile and cannon for receiving such a projectile |
| US11867487B1 (en) | 2021-03-03 | 2024-01-09 | Wach Llc | System and method for aeronautical stabilization |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2487083A1 (en) | 1980-07-19 | 1982-01-22 | Max Planck Gesellschaft | OPTICAL FIBER DEVICE FOR TRANSMITTING LINEAR POLARIZED LIGHT |
| SU1141293A1 (en) | 1983-07-11 | 1985-02-23 | Кировский Завод Охотничьего И Рыболовного Снаряжения | Bullet |
| WO2006123192A2 (en) | 2005-05-17 | 2006-11-23 | Vitali Abramian | Method for imparting a rotation movement to a bullet in an arm barrel channel |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE298588C (en) * | ||||
| RU2225974C1 (en) * | 2002-09-13 | 2004-03-20 | Автономная некоммерческая организация "Центральный научно-исследовательский и опытно-конструкторский институт "Центр перспективных исследований" | Method imparting rotation to bullet or other projectile and firearm complex for its implementation |
| DE10244571C1 (en) * | 2002-09-25 | 2003-12-04 | Wilhelm Brenneke Gmbh & Co Kg | Shotgun or smooth bore projectile, has hollow front section connected by location of intentional breakage to rear section which slides into it during firing |
| UA91671C2 (en) * | 2003-10-11 | 2010-08-25 | Руаг Аммотек Гмбх | Shotgun-barrel projectile with intercalaction and cartridge |
-
2008
- 2008-05-16 WO PCT/GE2008/000004 patent/WO2008142457A2/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2487083A1 (en) | 1980-07-19 | 1982-01-22 | Max Planck Gesellschaft | OPTICAL FIBER DEVICE FOR TRANSMITTING LINEAR POLARIZED LIGHT |
| SU1141293A1 (en) | 1983-07-11 | 1985-02-23 | Кировский Завод Охотничьего И Рыболовного Снаряжения | Bullet |
| WO2006123192A2 (en) | 2005-05-17 | 2006-11-23 | Vitali Abramian | Method for imparting a rotation movement to a bullet in an arm barrel channel |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3029412A1 (en) * | 2014-12-05 | 2016-06-08 | Thales | Projectile and cannon for receiving such a projectile |
| FR3029614A1 (en) * | 2014-12-05 | 2016-06-10 | Thales Sa | PROJECTILE AND CANON INTENDED TO RECEIVE SUCH PROJECTILE |
| JP2016109416A (en) * | 2014-12-05 | 2016-06-20 | タレス | Projectile and barrel accommodating projectile |
| US10222186B2 (en) | 2014-12-05 | 2019-03-05 | Thales | Projectile and barrel intended to accommodate such a projectile |
| US11867487B1 (en) | 2021-03-03 | 2024-01-09 | Wach Llc | System and method for aeronautical stabilization |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008142457A3 (en) | 2009-01-15 |
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