Composite Projectiles Using Polyamide Jackets for Barrel Wear Reduction
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Solution Overview
Problem
Existing projectile technologies are limited in producing multi-functional, cost-effective, and reproducible composite projectiles with tailored performance characteristics, often requiring trade-offs in performance, reproducibility, safety, and cost, and struggle with issues like cook-off, metal-on-metal contact leading to barrel wear, and collateral damage from traditional breaching rounds.
Innovation Solution
The use of advanced composites and additives, specifically polyamide polymers and energetic particles like Prince Rupert drops, along with melt-flow processing techniques such as extrusion and injection molding, allows for the creation of composite projectiles with customizable properties, including polymeric jackets for reduced friction and energy-efficient penetrator release, and frangible designs for minimized collateral damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional metal jacketing is used, then lubricity and reduced reloading failures are achieved, but barrel wear and metal deposits are increased
Solution Approach 1:
The patent uses a composite structure combining a lead core with a copper jacket, where the copper jacket provides lubricity and reduces reloading failures while the lead core provides ballistic performance. This composite approach allows the projectile to achieve reliable reloading operation without excessive barrel wear, as the copper surface reduces friction without depositing significant metal in the bore.
Solution Approach 2:
The patent modifies the material composition parameters by using specific alloy ratios (lead core with copper jacket) and controlling the hardness and lubricity characteristics of the jacketing material to achieve optimal balance between reloading reliability and barrel wear reduction.
2Strength
If hardened metal core is used for armor defeating, then penetration capability is improved, but fragment impact on unintended targets is increased
Solution Approach 1:
The patent segments the projectile into distinct functional components: a hardened penetrator core for armor penetration and a separate jacketing material that controls fragmentation. The penetrator is designed to remain intact or minimize fragmentation, while the jacketing material is engineered to deform in a controlled manner upon impact, preventing harmful fragment dispersion.
Solution Approach 2:
The patent introduces an intermediary jacketing material (copper or polymer) between the hardened penetrator and the target. This intermediary layer serves as a buffer that controls the penetration process, allowing the hardened core to maintain its structural integrity while the jacketing material manages the energy transfer and prevents uncontrolled fragmentation.
3Force
If traditional breaching rounds are used, then door breaching capability is achieved, but collateral damage is increased
Solution Approach 1:
The patent changes the material parameters of the breaching round by using a polymer-based composite material instead of traditional metal. This polymer composite maintains the necessary breaching force through controlled deformation and energy transfer, while the material's inherent properties prevent the generation of harmful fragments that cause collateral damage.
Solution Approach 2:
The patent employs a composite material system combining polymer matrix with reinforcing elements (such as fibers or particles) to create a breaching round that delivers high breaching force through composite structural design rather than metal penetration, thereby eliminating collateral damage from metal fragments.
4Adaptability or versatility
If advanced composites and melt-flow processing are used, then multi-functionality and tailored performance are achieved, but manufacturing complexity is increased
Solution Approach 1:
The patent develops a universal composite projectile platform that can be configured for multiple functions (ballistic, breaching, training) by varying the material composition and structural parameters within the same manufacturing framework. The melt-flow processing technique enables a single production system to create different projectile types by adjusting material formulations, eliminating the need for separate manufacturing lines for each application.
Solution Approach 2:
The patent uses parameter changes in material composition (such as adjusting the ratio of lead to copper, or varying polymer properties) to tailors performance characteristics without changing the fundamental manufacturing process. This allows multi-functionality to be achieved through material parameter variation rather than process complexity.
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
This approach enables the production of composite projectiles that offer improved ballistic performance, reduced barrel wear, enhanced safety through minimized collateral damage, and increased versatility across various applications, including armor penetration and breaching, while maintaining cost-effectiveness and reproducibility.
Implementation Method 1
utilize advanced composites and additives with manufacturing techniques to produce composite projects... utilize melt-flow processing to produce composite projects... polyamide polymer as a binding agent
Implementation Method 2
melt-flow processing techniques may include but are not limited to extrusion, roto-molding, injection molding
Data Source
AI summary
The present invention is directed to composite projectiles and the manufacture thereof for a wide range of purposes and applications through variation of the composite makeup of such composite projectiles. Embodiments of the invention include composite projectiles configured for manufacture using melt-flow manufacturing methods use-cases and composite projectiles having specialized performance for more effective use in specific use-cases.