WO2013169127A1 - Projectile for rifled bore firearms - Google Patents

Projectile for rifled bore firearms Download PDF

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Publication number
WO2013169127A1
WO2013169127A1 PCT/PL2013/000061 PL2013000061W WO2013169127A1 WO 2013169127 A1 WO2013169127 A1 WO 2013169127A1 PL 2013000061 W PL2013000061 W PL 2013000061W WO 2013169127 A1 WO2013169127 A1 WO 2013169127A1
Authority
WO
WIPO (PCT)
Prior art keywords
projectile
length
approximately
rings
distance
Prior art date
Application number
PCT/PL2013/000061
Other languages
French (fr)
Inventor
Jan OLSZEWSKI
Original Assignee
Olszewski Jan
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olszewski Jan filed Critical Olszewski Jan
Publication of WO2013169127A1 publication Critical patent/WO2013169127A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F42B5/025—Cartridges, i.e. cases with charge and missile characterised by the dimension of the case or the missile
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B30/00—Projectiles or missiles, not otherwise provided for, characterised by the ammunition class or type, e.g. by the launching apparatus or weapon used
    • F42B30/02—Bullets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/34—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect expanding before or on impact, i.e. of dumdum or mushroom type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/02—Driving bands; Rotating bands

Definitions

  • This invention relates to a projectile intended for firing from riffled bore firearms.
  • Deviation from the aiming point is caused by a thermal impulse when gases from the propellant charge are projected.
  • the thermal impulse causes the barrel to vibrate very strongly, affecting particularly its tapered muzzle- end that carries these strong vibrations over to the projectile travelling through the bore and having spin stabilisation only.
  • Barrel vibrations result not only in the deviation from the aiming point, but also in a great loss of energy, decreasing striking power of the projectile. These deviations can reach up to 3 minutes of arc at the distance of 100 to 300 meters.
  • the deviation angle of the projectile flight can be reduced by making the barrel thicker (e.g. in varmint rifles), which reduces barrel vibrations.
  • Other designs strive to increase the velocity and rotation of a projectile. Deviation from the aiming point can be also reduced by the use of an appropriate shape of the projectile.
  • a projectile according to this invention characterises in that its body has the shape of an elongated solid of revolution, profiled so its lower part is cylindrically shaped with diameter equal to the calibre of the projectile, whereas at the distance from the base equal to approximately 1/10 of the projectile length, the diameter of the projectile decreases gradually, creating a waist of its body at the distance of approximately 1/4 of the projectile length from the base, and then gradually increases to reach the diameter of the lower part at the distance of approximately 2/3 of the projectile length, where it assumes the shape of a paraboloid of revolution, forming the head of the projectile.
  • the head comprises a projectile ogive with rims and a hole determining the magnitude of bullet nose flattening.
  • the projectile On its exterior circumference, the projectile is equipped with at least two plastic or metal rings, whereas one ring is located in the lower part of the projectile, from the base up to approximately 1/4 of the projectile length, reaching the waist, and the other ring is located at 1/3 of length from the nose of the head.
  • the rings are placed in recesses on the exterior surface of the body, so the body of the projectile with the rings forms a uniform and smooth solid.
  • the rings can touch each other, forming a uniform unit.
  • the invention solves the problem of a projectile design that neutralises the influence of barrel vibrations onto the projectile.
  • FIG. 1 presents an external view of the first example of projectile embodiment
  • Fig. 2 - a longitudinal section of the first example of projectile embodiment
  • Fig. 3 an external view of the second example of projectile embodiment
  • Fig. 4 - a longitudinal section of the second example of projectile embodiment.
  • the projectile constitutes an elongated solid of revolution, profiled appropriately so its lower part 1 is shaped cylindrically with diameter equal to the calibre of the projectile.
  • the diameter of the projectile decreases gradually, creating a waist 2 of its body at the distance of approximately 1/4 of the projectile length from the base, and then gradually increases to reach the diameter of the lower part at the distance of approximately 2/3 of the projectile length, where it assumes the shape of a paraboloid of revolution, forming the head of the projectile.
  • the head comprises a projectile ogive with rims 5 and a hole 6 determining the magnitude of bullet nose flattening.
  • the projectile On its exterior circumference, the projectile is equipped with two plastic or metal rings 3 and 4, whereas one ring is located in the lower part of the projectile, from the base up to approximately 1/4 of the projectile length, reaching the waist, and the other ring is located at 1/3 of length from the nose of the head.
  • the rings are placed in recesses on the exterior surface of the body, so the body of the projectile with the rings forms a uniform and smooth solid.
  • the projectile has a recess in its bottom part.
  • the projectile constitutes an elongated solid of revolution, profiled appropriately so its lower part 1 is shaped cylindrically with diameter equal to the calibre of the projectile.
  • the diameter of the projectile decreases gradually, creating a waist 2 of its body at the distance of approximately 1/4 of the projectile length from the base, and then gradually increases to the reach the diameter of the lower part at the distance of approximately 2/3 of the projectile length, where it assumes the shape of a paraboloid of revolution, forming the head of the projectile.
  • the head comprises a projectile ogive with rims 5 and a hole 6 determining the magnitude of bullet nose flattening.
  • the projectile On its exterior circumference, the projectile is equipped with two plastic or metal rings 3 and 4, whereas one ring is located in the lower part of the projectile, from the base up to approximately 1/4 of the projectile length, reaching the waist, and the other ring is located at 1/3 of length from the nose of the head and touches the lower ring, forming a uniform unit.
  • the rings are placed in recesses on the exterior surface of the body, so the body of the projectile with the rings forms a uniform and smooth solid.
  • the projectile has a recess in its bottom part.
  • the appropriately profiled shape of the projectile results in providing fin stabilisation to this projectile, due to the waist of its body located as close as possible to the bottom part.
  • the projectile After leaving the barrel nozzle, the projectile is subjected to the flow of a condensed air stream that immediately neutralises the runout of the projectile. This prevents the loss of energy, improving striking power and accuracy of the shot.
  • the invention can be applied to projectiles of various calibres.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)

Abstract

A projectile, which body has the shape of an elongated solid of revolution, profiled so its lower part (1) is cylindrically shaped with diameter equal to the calibre of the projectile, whereas the diameter of the projectile decreases gradually, creating a waist (2) of its body at the distance of approximately 1/4 of the projectile length from the base, and then gradually increases to reach the diameter of the lower part at the distance of approximately 2/3 of the projectile length, where it assumes the shape of a paraboloid of revolution, forming the head of the projectile. The head comprises a projectile ogive with rims (5) and a hole (6) determining the magnitude of bullet nose flattening. On its exterior circumference, the projectile is equipped with at least two plastic or metal rings (3, 4). The rings are placed in recesses on the exterior surface of the body. The invention solves the problem of a projectile design that neutralises the influence of barrel vibrations onto the projectile.

Description

Projectile for rifled bore firearms
TECHNICAL FIELD
This invention relates to a projectile intended for firing from riffled bore firearms.
BACKGROUND ART
Known projectiles for riffled bore firearms are of cylindrical shape. A certain scatter of hits is a deficiency of all prior art cylindrical bullets. Deviation from the aiming point, referred to as the nutation angle, is caused by a thermal impulse when gases from the propellant charge are projected. The thermal impulse causes the barrel to vibrate very strongly, affecting particularly its tapered muzzle- end that carries these strong vibrations over to the projectile travelling through the bore and having spin stabilisation only. Barrel vibrations result not only in the deviation from the aiming point, but also in a great loss of energy, decreasing striking power of the projectile. These deviations can reach up to 3 minutes of arc at the distance of 100 to 300 meters. In known designs, the deviation angle of the projectile flight can be reduced by making the barrel thicker (e.g. in varmint rifles), which reduces barrel vibrations. Other designs strive to increase the velocity and rotation of a projectile. Deviation from the aiming point can be also reduced by the use of an appropriate shape of the projectile.
DISCLOSURE OF THE INVENTION
A projectile according to this invention characterises in that its body has the shape of an elongated solid of revolution, profiled so its lower part is cylindrically shaped with diameter equal to the calibre of the projectile, whereas at the distance from the base equal to approximately 1/10 of the projectile length, the diameter of the projectile decreases gradually, creating a waist of its body at the distance of approximately 1/4 of the projectile length from the base, and then gradually increases to reach the diameter of the lower part at the distance of approximately 2/3 of the projectile length, where it assumes the shape of a paraboloid of revolution, forming the head of the projectile. The head comprises a projectile ogive with rims and a hole determining the magnitude of bullet nose flattening. On its exterior circumference, the projectile is equipped with at least two plastic or metal rings, whereas one ring is located in the lower part of the projectile, from the base up to approximately 1/4 of the projectile length, reaching the waist, and the other ring is located at 1/3 of length from the nose of the head. The rings are placed in recesses on the exterior surface of the body, so the body of the projectile with the rings forms a uniform and smooth solid. The rings can touch each other, forming a uniform unit.
The invention solves the problem of a projectile design that neutralises the influence of barrel vibrations onto the projectile.
BRIEF DESCRIPTION OF THE DRAWINGS
A preferred examples of embodiment of the invention are presented on the drawings, where Fig. 1 presents an external view of the first example of projectile embodiment, Fig. 2 - a longitudinal section of the first example of projectile embodiment, Fig. 3 - an external view of the second example of projectile embodiment, and Fig. 4 - a longitudinal section of the second example of projectile embodiment.
EXAMPLE FOR CARRYING OUT THE INVENTION
In the first example of embodiment, the projectile constitutes an elongated solid of revolution, profiled appropriately so its lower part 1 is shaped cylindrically with diameter equal to the calibre of the projectile. At the distance from the base equal to approximately 1/10 of the projectile length, the diameter of the projectile decreases gradually, creating a waist 2 of its body at the distance of approximately 1/4 of the projectile length from the base, and then gradually increases to reach the diameter of the lower part at the distance of approximately 2/3 of the projectile length, where it assumes the shape of a paraboloid of revolution, forming the head of the projectile. The head comprises a projectile ogive with rims 5 and a hole 6 determining the magnitude of bullet nose flattening. On its exterior circumference, the projectile is equipped with two plastic or metal rings 3 and 4, whereas one ring is located in the lower part of the projectile, from the base up to approximately 1/4 of the projectile length, reaching the waist, and the other ring is located at 1/3 of length from the nose of the head. The rings are placed in recesses on the exterior surface of the body, so the body of the projectile with the rings forms a uniform and smooth solid. In a preferred example of embodiment of the invention, the projectile has a recess in its bottom part.
In the second example of embodiment, the projectile constitutes an elongated solid of revolution, profiled appropriately so its lower part 1 is shaped cylindrically with diameter equal to the calibre of the projectile. At the distance from the base equal to approximately 1/10 of the projectile length, the diameter of the projectile decreases gradually, creating a waist 2 of its body at the distance of approximately 1/4 of the projectile length from the base, and then gradually increases to the reach the diameter of the lower part at the distance of approximately 2/3 of the projectile length, where it assumes the shape of a paraboloid of revolution, forming the head of the projectile. The head comprises a projectile ogive with rims 5 and a hole 6 determining the magnitude of bullet nose flattening. On its exterior circumference, the projectile is equipped with two plastic or metal rings 3 and 4, whereas one ring is located in the lower part of the projectile, from the base up to approximately 1/4 of the projectile length, reaching the waist, and the other ring is located at 1/3 of length from the nose of the head and touches the lower ring, forming a uniform unit. The rings are placed in recesses on the exterior surface of the body, so the body of the projectile with the rings forms a uniform and smooth solid. In a preferred example of embodiment of the invention, the projectile has a recess in its bottom part.
The appropriately profiled shape of the projectile results in providing fin stabilisation to this projectile, due to the waist of its body located as close as possible to the bottom part. After leaving the barrel nozzle, the projectile is subjected to the flow of a condensed air stream that immediately neutralises the runout of the projectile. This prevents the loss of energy, improving striking power and accuracy of the shot.
The invention can be applied to projectiles of various calibres.

Claims

Claims
1. A projectile for rifled bore firearms, with its body having the shape of an elongated solid of revolution with a head, wherein the head comprises a projectile ogive with rims (5) and a hole determining the magnitude of bullet nose flattening (6), and the body is profiled so its lower part (1) is cylindrically shaped with diameter equal to the calibre of the projectile, whereas at the distance from the base equal to approximately 1/10 of the projectile length, the diameter of the projectile decreases gradually, creating a waist of its body (2) at the distance of approximately 1/4 of the projectile length from the base, and then gradually increases to the reach the diameter of the lower part at the distance of approximately 2/3 of the projectile length, where it assumes the shape of a paraboloid of revolution, forming the head of the projectile.
2. A projectile according to claim 1, wherein the projectile is equipped with two plastic or metal rings (3) and (4) on its exterior circumference, whereas one ring is located in the lower part of the projectile, from the base up to approximately 1/4 of the projectile length, reaching the waist, and the other ring is located at 1/3 of length from the nose of the head.
3. A projectile according to claim 2, wherein the rings (3) and (4) touch each other, forming a uniform unit.
4. A projectile according to claim 2 or 3, wherein the ring or rings are located in recesses in the exterior surface of the body of the projectile, so the body with the ring or rings constitutes a uniform and smooth solid.
PCT/PL2013/000061 2012-05-07 2013-04-29 Projectile for rifled bore firearms WO2013169127A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL399099A PL220109B1 (en) 2012-05-07 2012-05-07 Projectile for threaded weapon
PLP.399099 2012-05-07

Publications (1)

Publication Number Publication Date
WO2013169127A1 true WO2013169127A1 (en) 2013-11-14

Family

ID=48856907

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/PL2013/000061 WO2013169127A1 (en) 2012-05-07 2013-04-29 Projectile for rifled bore firearms

Country Status (2)

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PL (1) PL220109B1 (en)
WO (1) WO2013169127A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1556160A (en) * 1924-06-20 1925-10-06 Western Cartridge Co Game bullet
US4708063A (en) * 1982-11-24 1987-11-24 Serge Ladriere Projectiles intended to be fired by a fire-arm
US4932326A (en) * 1987-05-27 1990-06-12 Serge Ladriere Fiercing projectiles

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1556160A (en) * 1924-06-20 1925-10-06 Western Cartridge Co Game bullet
US4708063A (en) * 1982-11-24 1987-11-24 Serge Ladriere Projectiles intended to be fired by a fire-arm
US4932326A (en) * 1987-05-27 1990-06-12 Serge Ladriere Fiercing projectiles

Also Published As

Publication number Publication date
PL220109B1 (en) 2015-08-31
PL399099A1 (en) 2013-11-12

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