Multi-Part Hunting Projectile with Compression Cylinder
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Solution Overview
Problem
Current lead-free jacketed bullets for hunting often experience undesired deformations, tearing, or bursting, leading to insufficient penetration and inconsistent performance across different game species, requiring high impact velocities and resulting in either inadequate energy transfer or excessive damage, which complicates hunting and practice shooting.
Innovation Solution
A two-part or multi-part partial fragmentation bullet design featuring a collapsible nose and a non-collapsible tail connected by a compression cylinder, which decomposes upon impact, allowing for controlled fragmentation and directional stability of the residual bolt, optimized for production cost-effectiveness and performance across various game species.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lead-free jacketed bullets with soft material cores are used, then hunting performance is improved, but undesired deformations and tearing of the jacket occur
Solution Approach 1:
The bullet is divided into a collapsible nose section and a non-collapsible tail section connected by a connecting section. The nose is designed with predetermined collapse lines that allow controlled fragmentation upon impact, while the tail maintains structural integrity for stable penetration. This segmentation resolves the contradiction by allowing the nose to fragment reliably for hunting performance while the tail preserves jacket integrity for penetration.
Solution Approach 2:
Different sections of the bullet are designed with different mechanical properties. The nose section has reduced wall thickness and predetermined collapse lines to enable controlled fragmentation, while the tail section maintains full wall thickness for structural strength. This local differentiation allows the bullet to exhibit both reliable fragmentation and jacket integrity in their respective sections.
2Use of energy by moving object
If high impact velocities are used to ensure desired fragmentation effect, then energy transfer to target body increases, but bursting of organs and major bruising occurs
Solution Approach 1:
The nose section is pre-designed with predetermined collapse lines and a collapsible structure that is ready to fragment at specific impact velocities. This preliminary preparation ensures that fragmentation occurs in a controlled manner at the optimal velocity threshold, maximizing energy transfer while preventing excessive velocity effects like organ bursting.
Solution Approach 2:
The bullet exhibits dynamic behavior where the nose transitions from a solid state during flight to a fragmented state upon impact. The collapsible nose dynamically adapts its structure based on impact conditions, fragmenting only when necessary to transfer energy effectively, thereby avoiding the harmful effects of excessive velocity.
3Reliability
If solid bullets with blind holes and hollow points are used, then controlled fragmentation is achieved, but residual bolts have different shapes and weights that reduce penetration stability
Solution Approach 1:
The bullet is segmented into a collapsible nose and a non-collapsible tail with consistent cross-section. This segmentation ensures that the tail maintains a uniform, stable structure for penetration while the nose provides controlled fragmentation. The connecting section is designed to separate cleanly, leaving a stable residual bolt that preserves penetration stability.
Solution Approach 2:
The bullet design maintains consistent geometric parameters (cross-sectional area, length) in the tail section to ensure uniform residual bolt formation. By controlling the collapse characteristics of the nose while maintaining tail parameters, the design achieves reliable fragmentation without compromising residual bolt stability.
4Ease of manufacture
If conventional lead-free jacketed bullets are used for practice shooting, then cost is reduced, but performance is insufficient for long-range hunting
Solution Approach 1:
The bullet is divided into functionally distinct sections: a collapsible nose for controlled fragmentation and a non-collapsible tail for stable penetration. This segmentation enables the bullet to achieve long-range hunting performance through predictable fragmentation and stable residual bolt formation, while maintaining cost-effectiveness through simplified manufacturing of the modular design.
Solution Approach 2:
The bullet employs local quality differentiation where the nose section has reduced wall thickness and predetermined collapse lines for fragmentation, while the tail section maintains full structural integrity for penetration. This localized design approach achieves long-range performance without requiring expensive complex manufacturing throughout the entire bullet.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The bullet achieves controlled fragmentation and reliable penetration with a directionally stable residual bolt, ensuring quick and effective hunting while maintaining aerodynamic shape for long-range trajectories and reducing barrel friction, thus addressing the limitations of existing lead-free bullets.
Implementation Method 1
After being fired from a weapon, the decomposable section only decomposes when it hits and when or after penetrating a target body
Implementation Method 2
the collapsible nose is designed with predetermined breaking points that ensure controlled fragmentation upon impact
Implementation Method 3
maintaining aerodynamic shape for long-range trajectories
Implementation Method 4
The non-collapsible tail is designed to maintain directional stability during penetration
Implementation Method 5
reducing barrel friction
Data Source
AI summary
The multi-piece partial fragmentation projectile comprises a demountable section or strut (2) and a non-demountable section or tail (3) arranged behind the strut in the shooting direction. A connecting section is provided, which connects the strut and the tail with each other. The connecting section is formed as a concentric hollow compression cylinder with a smaller outer diameter than the strut and the tail. The compression cylinder is integrally formed on the strut or the tail and is inserted into the strut or the tail.