Method for increasing effective range, destructive force and accuracy by having counterweight jacket for moving center of gravity of bullet (SHELL) forward

Abstract

The present invention relates to a method for improving flight stability, effective range, accuracy, and destructive force by moving the center of gravity of a bullet (shell) forward, and the bullet (shell). To this end, the front part of a counterweight jacket of the bullet (shell) is designed to be thicker or higher in density than the rear part thereof, so that the center of gravity is naturally moved forward. This structural feature stabilizes the trajectory by minimizing the yaw angle during flight, and increases the force of impact transmission to the target. In addition, a material having a low specific gravity is used inside a gunpowder contact part and the rear part to further strengthen the effect of moving the center of gravity to the front part. The present invention can maintain a stable flight trajectory in both ground and underwater environments, and maximizes the performance of a bullet (shell) to increase an effective range, destructive force, and accuracy.

Description

A method for increasing effective range or destructive power and accuracy by providing a counterweight jacket that shifts the center of gravity forward, and a bullet (gun) ball.

[0001] The present invention belongs to the field of bullet (gun) design and manufacturing technology for improving the flight stability, effective range, hit rate, and destructive power of bullets (guns).

[0002] In particular, the present invention relates to a structural design that adjusts the shape of a counterweight jacket to shift the center of gravity of a projectile (gun) ball forward, thereby minimizing the yaw angle during flight in both ground and underwater environments, maintaining a stable trajectory, and increasing destructive power against a target.

[0003] Research to enhance the flight stability and destructive power of projectiles has been ongoing for a long time, and various design methods have been developed, particularly to improve effective range and hit rate.

[0004] In conventional bullet designs, flight stability was sought by reducing the yaw angle that occurs during flight to stabilize the trajectory and increase concentration on the target, mainly by adjusting the specific gravity of the internal components of the bullet or adding grooves that control airflow.

[0005] For example, methods were used to suppress wake vortices by installing air guide grooves at the rear of the bullet or to shift the center of gravity by adjusting the internal material. While these technologies contributed to reducing the yaw angle during flight and maintaining a stable trajectory, the complexity of the internal structure caused problems such as difficult manufacturing and increased costs.

[0006] Furthermore, designs optimized for terrestrial environments have predominantly been limited to performance degradation in special environments such as underwater environments. This invention overcomes the limitations of such background technology and presents a new approach that can enhance flight stability, effective range, and destructive power in various environments through a simple external structural design alone.

[0007] In conventional projectile (gunball) designs, methods were primarily used to adjust the material or specific gravity of internal components or to adopt additional structures such as air guide grooves in order to reduce the yaw angle during flight, ensure flight stability, and improve effective range and hit rate.

[0008] However, this approach increases the complexity of design and manufacturing, and the multi-layered structure of the bullet leads to higher manufacturing costs and presents the problem of difficulty in maintaining consistent flight stability.

[0009] In addition, existing designs are often optimized only for terrestrial environments, so they have limitations in that they fail to deliver expected performance in special environments such as underwater environments.

[0010] The present invention aims to solve these problems through a structural improvement that shifts the center of gravity of the projectile (gunball) forward solely by changing the shape of the counterweight jacket. The main objective of the present invention is to provide a design that enhances the flight stability and hit rate of the projectile (gunball), and maximizes effective range and destructive power in both terrestrial and underwater environments.

[0011] The present invention provides a solution for improving flight stability and destructive power by shifting the center of gravity forward in the shape of the counterweight jacket of a bullet (or cannonball).

[0012] Specifically, a method was adopted to naturally shift the center of gravity of the bullet (or cannonball) forward by making the front part of the countweight jacket thicker or denser than the rear part.

[0013] Through this, the bullet (or cannonball) minimizes the yaw angle during flight to maintain a stable trajectory, and delivers a concentrated impact upon reaching the target to increase destructive power.

[0014] In addition, by applying a low-density material to the interior of the bore contact area and the rear section, the effect of shifting the center of gravity to the front section is further enhanced, thereby increasing flight stability and hit rate without the complex structural elements required by existing technology.

[0015] This solution can maximize the increase in effective range, destructive power, and hit rate in both terrestrial and underwater environments, thereby providing technical advantages that significantly improve the performance of projectiles.

[0016] The present invention aims to dramatically improve flight stability, effective range, hit rate, and destructive power through the design features of a bullet (gun) ring.

[0017] By designing the front part of the counterweight jacket to be thicker or denser than the rear part to shift the center of gravity forward, the yaw angle occurring during flight can be minimized and the trajectory stabilized.

[0018] This is particularly effective in both terrestrial and underwater environments, significantly improving hit accuracy while maximizing destructive power.

[0019] In addition, by applying a low-density material to the interior of the bore contact area and the rear section, the complexity of the manufacturing process was reduced while further enhancing flight stability.

[0020] This design reduces recoil upon firing and ensures that the bullet maintains stable flight after being fired. By overcoming the limitations of existing technology, the present invention optimizes performance in various environments and provides a new bullet technology capable of striking targets with longer range and higher accuracy.

[0021] FIG. 1a is a side view showing an example of a bullet with internal components wrapped in an outer jacket.

[0022] FIG. 1b is a side view showing an example of a bullet formed with an auxiliary penetrator protruding and compressed at the front.

[0023] FIG. 2a is a cross-sectional view showing an example of a bullet with an auxiliary penetrator (1) and a slug (2) of the internal configuration of the bullet of FIG. 1a, and a bullet wrapped in a counterweight jacket.

[0024] FIGS. 2b, 2c, and 2d are cross-sectional views showing examples of a bullet of FIG. 1b, in which the auxiliary penetrator (1) and slug (2) are compressed and combined with a counterweight jacket (3).

[0025] FIG. 3a is a cross-sectional view showing the BB area of ​​the countweight jacket (3) as a cross-section of the bullet example of FIG. 1a.

[0026] FIG. 3b is a cross-sectional view showing the BB area of ​​the countweight jacket (3) as a cross-section of an example such as a pistol bullet.

[0027] FIG. 3c is a cross-sectional view showing the BB area of ​​the countweight jacket (3) as a cross-section of the bullet example of FIG. 1b.

[0028] FIG. 3d is a cross-sectional view showing the BB area of ​​the countweight jacket (3) as an example cross-section of medium-caliber and large-caliber bullet (gun) rings.

[0029] FIG. 4 is a process diagram showing the steps of the method of the present invention.

[0030] FIG. 5 is a cross-sectional view of an embodiment configured with a counterweight jacket having an open rear portion as another example of the present invention.

[0031] FIG. 6 is a side view showing the phenomenon in which a bullet fired from a gun muzzle and flying after a certain period of time exhibits precession.

[0032] Embodiments of the present invention will be described in detail below with reference to the attached drawings.

[0033]

[0034] The present invention applies, for example, to relatively small caliber bullets used in small gun barrels such as pistols, rifles, and machine guns, relatively large caliber bullets used in cannons, howitzers, mortars, and large guns or artillery weapons such as those installed on tanks, fighter aircraft (including all aircraft), battleships, and submarines.

[0035]

[0036] Examples of bullets include bullets, shells, and materials fired from weapons using propellants.

[0037]

[0038] In addition, it can be applied not only to weapons that use gunpowder as a propellant but also to projectiles fired from weapons such as railguns that use magnetic fields.

[0039]

[0040] FIGS. 1a and 1b are drawings showing the appearance of a bullet according to an embodiment of the present invention. The bullet (gun) ring (100) includes a front portion (110), a gun barrel contact portion (120), and a rear portion (130).

[0041]

[0042] The above-mentioned front portion (110) has an ogive shape with a substantially streamlined nose or an arched step shape to reduce air resistance or air drag.

[0043]

[0044] The above-mentioned bore contact portion (120) may be a straight portion with a complete diameter. The bore corresponds to the diameter of the above-mentioned bore contact portion (120). The above-mentioned bore contact portion (120) may have a band formed on the outer surface near the rear portion (130).

[0045]

[0046] The above band limits or prevents forward loss of gas around the bullet (100) along with the rifling of the barrel, and is made in close contact with the outer jacket to prevent the internal core from shaking during flight or to allow the internal core to have rotational force of the bullet, and is made of a metallic or non-metallic material such as copper or gilding metal, for example.

[0047]

[0048] The rear portion (130) has a boat tail shape in which its diameter gradually decreases. The rear portion (130) may include one or more recess grooves (131). The recess grooves (131) may be formed with an equal and constant spacing between them. Each recess groove (131) extends from a portion of the outer diameter end of the bore contact portion (120) to the bottom surface of the bullet (gun) ring (100) and may be substantially straight.

[0049]

[0050] All of these projectiles (guns) may be configured such that, in terms of internal composition, an auxiliary penetrator (1) constituting the front part and a slug (2) constituting the interior of the gun barrel contact part and the rear part, and the slug may be externally jacketed to surround both the auxiliary penetrator and the slug from the outside. In order to examine the method of increasing the effective range, destructive power, and hit rate through an embodiment of the present invention, the steps of the method shown in FIG. 4 can be distinguished.

[0051] Step 10a, as the first step, prepares a projectile (gun) ball comprising a streamlined or fixed-shape front portion, a bore contact portion that contacts the bore to receive rotational force, and a boat-tail or straight-line shaped rear portion; Step 20a, wherein a counterweight jacket constituting the bore contact portion and the front portion includes a structure in which the front portion is formed to be thicker or denser than the rear portion, and the rear portion is open or composed of a material with low specific gravity, thereby shifting the center of gravity of the projectile (gun) ball forward; and Step 30a, a method for minimizing the yaw angle during flight and improving trajectory stability and concentration on land and underwater through the forward-shifted center of gravity,

[0052] By shifting the center of gravity of the projectile (gunball) to the forward portion, the angle of descent of the projectile (gunball) inside and outside the gun barrel is reduced, thereby stabilizing flight; this can extend the range and even increase accuracy.

[0053]

[0054] To explain the bullet (or cannonball) in more detail,

[0055] FIG. 1a illustrates a bullet (gun) ring structure in which an auxiliary penetrator and a slug are configured internally and a jacket surrounds them externally, and FIG. 1b illustrates a bullet (gun) ring structure in which an auxiliary penetrator protrudes externally and a slug is compressed and joined by aligning the auxiliary penetrator with the centerline and a jacket surrounds them externally.

[0056] In this way, by changing the center of gravity of the projectile (gun) ball through the size of the auxiliary penetrator and slug and the density of the specific gravity used, a structure is designed to increase weight in the forward section by utilizing the specific gravity material of the jacket that contacts the gun barrel from the outside, thereby shifting the center of gravity of the projectile (gun) ball further forward to reduce the yaw angle generated during flight, thereby maximizing the effective range and stability.

[0057]

[0058] Additionally, when the bullet (100) is fired from the muzzle, as shown in FIG. 1b, a certain amount of gas is uniformly discharged through the recess groove (131) exposed from the muzzle, so the yaw angle of the bullet (100) is reduced in the initial stage, so the bullet (100) flies stably, the effective range is extended, and high accuracy and destructive power are improved.

[0059]

[0060] Referring to FIG. 6, the conventional bullet (700) has a pressure center (CP) in a relative forward position and a center of gravity (CG) in a relative rear position.

[0061] Since the length of the bullet varies depending on its intended use, the distance between the centers of pressure (CP) increases as the bullet length increases. As the distance between the centers of pressure (CP) increases, the angle of yaw (Øy) increases.

[0062] A conventional bullet (700) fired from a muzzle undergoes a spin precession maneuver (SPM) in which the bullet rotates around an axis (e.g., a centerline) with a large yaw angle. When the spin precession maneuver (SPM) is performed with a large yaw angle, the bullet's range, accuracy, and destructive power are reduced.

[0063] The conventional bullet (700) experiences irregular airflow, such as yawing due to the yaw angle and vortices occurring behind the boat tail, which reduces the bullet's flight force and causes the bullet to perform a spin precession maneuver (SPM) around an axis (e.g., a centerline) with a yaw angle. When the spin precession maneuver (SPM) is performed with a large yaw angle, the bullet's range, accuracy, and destructive power are reduced.

[0064]

[0065] However, since the bullet (gun) ring (100) of the present embodiment includes a countweight jacket structure as described above and additionally one or more recess grooves (132),

[0066] Compared to conventional bullets, the bullet of the present invention is released while adhering to the surface of the outer diameter of the bullet at the moment the compressed gas is released from the muzzle, thereby providing the effect of stabilizing the flight of the bullet from the moment it leaves the muzzle.

[0067]

[0068] However, through an embodiment of the present invention, the projectile (gun) ball (100) of the present invention flies stably toward a target with a significantly small angle of descent both inside and outside the gun (gun) barrel, and the effective range, accuracy, and destructive power of the projectile (gun) ball (100) are significantly increased. In addition, recoil is reduced because gas can be discharged uniformly in the initial stage.

[0069]

[0070] Referring to FIG. 2a, a cross-section of a bullet (gun) ring is shown in which the center of gravity is shifted to the front through a counterweight jacket, even though there is no recess groove (131). The counterweight jacket of such a bullet (gun) ring can be configured with a structure that can be opened to the front and a structure that opens to the bottom surface of the bullet at the rear.

[0071] In addition, as shown in FIGS. 2b, 2c, and 2d, the auxiliary penetration (1) protrudes outward, and the internal components, along with the slug, are covered by a counterweight jacket. This configuration of the bullet (gun) ring can also shift the center of gravity of the bullet (gun) ring to the front.

[0072] The structure of the gun (or cannon) ring of Figs. 2b, 2c, and 2d may also be such that the lower edge of the counterweight jacket covers only up to the beginning of the boat tail so that the slug can be exposed to the base of the cannon.

[0073] Through this, the structure of the counterweight jacket (3) alone can be used to shift the center of gravity forward.

[0074] Figure 3 illustrates an example of various diameters of the present invention.

[0075] FIG. 3a is a cross-section of the structure of a typical small- and medium-caliber projectile (gun) ring in which an auxiliary penetrator and a slug are configured inside a counterweight jacket.

[0076] FIG. 3b is a structure of a bullet (or cannon) similar to a pistol bullet, with a relatively short length.

[0077] Unlike 3a, Fig. 3c shows a structure in which an auxiliary penetrator protrudes outward, and a counterweight jacket is formed to shift the center of gravity forward.

[0078] Figure 3d illustrates a structure in which a front region (BB) is formed by increasing the thickness and density of the counterweight jacket, which is an external jacket-shaped component of a large-caliber projectile (gun) such as an artillery shell.

[0079] The internal components of a medium / large caliber projectile (gun) ring, such as in Fig. 3d, can replace the auxiliary penetrator and slug by configuring the auxiliary penetrator portion with a solid material such as explosive (TNT, Comp IV, etc.) and the slug portion with a component such as a rocket propellant, except for the attachment to the front end, such as a fuse. Even in this case, by forming a counterweight jacket with a design structure that increases thickness and density in the front portion, such as a counterweight jacket, the range of the projectile (gun) ring is significantly improved compared to that of a conventional projectile (gun) ring.

[0080] As shown in FIG. 5, the shape of the counterweight jacket (3) may have an embodiment in which the rear part (130) is open, such as in the shapes of FIG. 2a, 2b, 2c, and 2d in which the front part is open.

[0081] Figure 5 can also be configured such that the rear side of the countweight jacket (3) is opened, thereby exposing the slug (2) of the internal component constituting the rear part, in a form in which the front area (BB) formed with a high thickness and density of the countweight jacket (3) in the front part.

[0082] In this form, when the countweight jacket is configured with the rear part open, the countweight jacket (3) is formed up to a lower area (CC) of a certain length from where the boat tail starts to the center of the bullet base, and the rear part of the bullet base is formed with a boat tail configuration using a material with low specific gravity of the slug (2), thereby shifting the center of gravity of the bullet (gun) further forward, so that the yaw angle of the bullet (100) flying inside and outside the gun (gun) barrel is further reduced and can be fired.

[0083]

[0084] FIGS. 2a, 2b, 2c, and 2d are drawings showing the internal configuration of a bullet (gun) ring (100) according to the present embodiment. The bullet (gun) ring (100) includes a plurality of components. Here, for the sake of brevity, the bullet (gun) ring (100) is shown having an auxiliary penetrator (1) and a slug (2).

[0085]

[0086] In this embodiment, the number of internal components included in the bullet is two, but the number of internal components is not particularly limited as long as the center (CG) of the bullet (100) can be located between the center point of the bullet (100) and the pressure center (CP) of the bullet (100).

[0087]

[0088] Alternatively, the number of internal components may be one. In other words, the bullet (gun) ring (100) may have a single component in which the auxiliary penetrator (1) and the slug (2) are integrally formed.

[0089]

[0090] The auxiliary penetrator (1) and the slug (2) can be made of the same material, for example, iron (Fe)-carbon (C) alloy, tungsten carbide (WC) alloy, alloy steel, aluminum (Al) alloy, copper (Cu), copper alloy, stainless steel, cast iron, tungsten alloy, chrome steel, molybdenum (Mo) alloy, Ni-Cr-Mo alloy, uranium (U) alloy, 5Cr-Mo-V alloy, 5Ni-Cr-Mo-V alloy, reinforced plastic, reinforced resin, non-ferrous metal, or acrylonitrile butadiene styrene (ABS) material.

[0091] In this case, the auxiliary penetrator (1) may be made of a material with a higher specific gravity than the slug (2). Each component is determined such that the center (CG) of the bullet (100) is located between the center point of the bullet (100) and the center of pressure (CP).

[0092]

[0093] In this case, when the counterweight jacket (3) is formed, the counterweight jacket (3) may be made of one or more materials selected from the group consisting of a soft material with a specific gravity similar to or lower than that of the auxiliary penetrator (1), for example, copper (Cu), a Cu-based alloy, an Al-based alloy, or a non-metallic material. Additionally, if a metal or non-metallic material with a lower specific gravity is used at the gun barrel contact part, the counterweight jacket may be used only for shifting the center of gravity in the front part.

[0094]

[0095] By selecting the materials of the auxiliary penetrator (1) and the slug (2) and adjusting the specific gravity or shape of the auxiliary penetrator (1) and the slug (2) according to the location of the center of pressure (CP), the center of gravity (CG) of the bullet (gun) (100) can be positioned between the center point of the bullet (gun) (100) and the center of pressure (CP). The location of the center of pressure (CP) varies depending on the shape of the front part (110) of the bullet (gun) (100), the length of the bullet (gun) (100), etc. The location of the center of pressure (CP) can be calculated using various methods, and the number of auxiliary penetrators and slugs used is not limited.

[0096]

[0097] The medium-caliber and large-caliber projectiles shown in FIG. 3d are merely examples, and can be applied as components having various types of explosive structures or explosives in the auxiliary penetrator and slug parts, and according to the embodiment, the performance of medium-caliber and large-caliber projectiles is significantly improved by extending the range of the projectile and reducing the error probability.

[0098] In addition, as a feature of the bullet (gun) ring constituting Fig. 5

[0099] The front portion of the counterweight jacket (3) and the protruding auxiliary penetrator (1) is designed to have a smooth, streamlined, or stepped shape to reduce resistance underwater, and the center of gravity is shifted forward to maximize trajectory stability during underwater flight. This is because the characteristics of an underwater projectile require stable flight without yaw, and in particular, there must be no yaw at the moment the front portion of the projectile (gun) contacts the water surface or at the moment it is fired underwater and contacts a fluid.

[0100] In particular, the rear section must be composed of a low-density material to minimize vortices in an underwater environment and must include structural features that reduce air and water resistance.

[0101] In addition, the slug in the bore contact area and inside the jacket is designed to be made of a material that does not deform even under external impact, thereby maintaining the flight stability of the bullet in high pressure and extreme environments, minimizing the angle of descent during the bullet's flight to increase the effective range, accuracy, and destructive power, and the recess groove (131) formed in the rear part evenly disperses gas discharge to reduce recoil.

[0102]

[0103] As described above, according to the present invention, a projectile (gun) ball capable of extending range, high accuracy, and destructive power can be provided.

[0104]

[0105] The preferred embodiments of the present invention are for illustrative purposes only, and the scope of the present invention is not limited to the specific examples described above. It will be apparent to those skilled in the art that various modifications and variations may be made without departing from the spirit and scope of the present invention, as defined in the appended claims.

[0106] 100 : Bullet (Powder)

[0107] 110: Front section

[0108] 120: Barrel contact part

[0109] 130 : Rear section

[0110] 131 : Recess Home

[0111] 1 : Secondary Penetrator

[0112] 2 : Slug

[0113] 3 : Countweight Jacket

[0114] BB: Front area featuring high thickness and density of the countweight jacket

[0115] CC: When the countweight jacket is configured with an open rear section, the lower point from the starting boat tail to a certain length where it bends toward the center of the anthracnose.

[0116] Fuse: A fuse inserted into the front of large and medium caliber projectiles.

[0117] Band: A band for receiving the rotational force of the rifling of large and medium caliber projectiles.

[0118] 700: A conventional bullet (gun) ball with the center of gravity located at the rear.

[0119] The present invention can be applied to various types of projectiles, such as small bullets for firearms, medium-to-large caliber bullets, and artillery shells, and can significantly improve flight stability, accuracy, effective range, and destructive power through a counterweight jacket structure that shifts the center of gravity forward. These characteristics apply equally in air as well as underwater, fundamentally improving the problems of trajectory instability and yaw angle generation inherent in conventional bullets. Therefore, the present invention can be utilized in various military and industrial fields, including high-performance ammunition for military and police use, as well as for special operations, underwater combat, and low-noise, low-velocity bullets.

[0120] Furthermore, the structure of the present invention is compatible with existing warhead manufacturing processes, making it suitable for mass production. Additionally, various center of gravity shifts can be achieved simply by adjusting the material combination and thickness of the front and rear sections, allowing for adjustment of range, penetration power, and concentration according to the purpose. Accordingly, the present invention possesses industrial utility value that enables wide application in defense companies, ammunition manufacturers, research institutions, and the like.

[0121] In particular, since this invention is based on the principle of center of gravity shift, it is applicable not only to small-caliber ammunition for firearms but also to large-caliber shells, submarine projectiles, and underwater robot propulsion systems, thus offering significant scalability to various industrial fields such as aviation, marine, and defense. Therefore, this invention is a highly useful industrial technology that enhances tactical operational efficiency while providing a core foundation for next-generation precision ammunition technology.

Claims

1. A method for increasing effective range, destructive power, or hit rate by providing a counterweight jacket that shifts the center of gravity forward, Step (10a) of preparing a bullet (gun) ring comprising a streamlined or fixed-shape front portion, a barrel contact portion that receives rotational force by contacting the barrel, and a boattail or straight-line shaped rear portion; Step (20a) of shifting the center of gravity of a bullet (gun) ball forward by including a structure in which the countweight jacket (3) constituting the above-mentioned gun barrel contact part and the front part is formed such that the front part is thicker or has a higher density than the rear part, and the rear part is open or made of a material with a lower specific gravity; A method for increasing effective range, destructive power, and hit rate by having a counterweight jacket that shifts the center of gravity forward, characterized by the step (30a) of minimizing the yaw angle during flight and improving trajectory stability and concentration on land and underwater through the center of gravity shifted forward.

2. In Claim 1, In order to enhance the forward shift of the center of gravity in the above (20a) step, A method for increasing effective range, destructive power, or hit rate equipped with a counterweight jacket that shifts the center of gravity forward, characterized by including the step (20b) of increasing the effect of shifting the center of gravity forward by configuring the material of the slug used inside the bore contact part and the rear part to have a lower specific gravity than the material forming the front part.

3. A bullet (gun) ring comprising a streamlined or fixed-shape front portion, a barrel contact portion that receives rotational force by contacting the barrel, and a boattail or straight-line shaped rear portion, The above bullet (gun) ring is composed of an auxiliary penetrator (1), a slug (2), and a counterweight jacket (3) that encloses the auxiliary penetrator and the slug. A bullet (gun) ring having a counterweight jacket that shifts the center of gravity forward, characterized in that the front portion (120) of the counterweight jacket (3) is configured to be thicker or denser than the rear portion (130), the auxiliary penetrator (1) is formed of a material with a higher specific gravity than the slug (2) to enhance the center of gravity shifting effect, and the slug is configured to be formed inside the barrel contact portion and the rear portion or to be exposed to the outside, thereby providing a reduction in yaw angle and flight stability effect during flight.

4. In Claim 3, The above-mentioned countweight jacket (3) is formed such that the front part is thicker or denser than the rear part, and may be configured with a structure in which the front part is open, the rear part is open, or both the front and rear parts are open, and when the rear part is open, the slug is formed of a material with a lower specific gravity than the auxiliary penetrator and the countweight jacket (3) so as to shift the center of gravity of the bullet forward, characterized by having a countweight jacket that shifts the center of gravity forward, thereby increasing the effective range, destructive power, or hit rate.

5. In claim 3 or claim 4, A bullet (gun) with increased effective range, destructive power, and hit rate, comprising a counterweight jacket (3) and a front portion of a protruding auxiliary penetrator (1) having a smooth, streamlined, or stepped shape to reduce resistance in water, a center of gravity shifted forward to maximize trajectory stability during underwater flight, a rear portion made of a low-density material to minimize vortices in an underwater environment, and a counterweight jacket that shifts the center of gravity forward to include structural features that reduce air and water resistance.

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