Flechette Casing Projectile for High Speed and Damage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional projectiles combining a warhead and motor are heavy, limiting speed and range, and the rocket casing material does not effectively damage targets upon fragmentation.
Innovation Solution
A projectile design featuring a casing made of multiple flechettes that act as both a reaction chamber and reinforcement, allowing for increased internal pressure, structural rigidity, and enhanced damage upon fragmentation, with flechettes dispersing upon detonation to increase impact energy and kill zone size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a warhead and motor are combined in a single projectile, then the projectile structure is simplified, but the projectile becomes relatively heavy thereby limiting speed and range
Solution Approach 1:
The projectile is divided into separate functional modules: a motor section and a warhead section connected by a flexible coupling. This segmentation allows each component to be optimized independently - the motor can be lightweight while the warhead maintains its penetrator function - thereby resolving the contradiction between structural simplicity and speed performance.
Solution Approach 2:
The warhead is extracted as a separate component from the motor assembly, allowing the motor to be optimized for weight and speed while the warhead is optimized for penetration. The flexible coupling connects these separate components, enabling the motor to achieve higher speeds without the weight penalty of an integrated warhead.
2Device complexity
If a warhead and motor are combined in a single projectile, then the projectile structure is simplified, but the projectile becomes relatively heavy thereby limiting range
Solution Approach 1:
The projectile is divided into separate functional modules: a motor section and a warhead section connected by a flexible coupling. This segmentation allows each component to be optimized independently - the motor can be lightweight while the warhead maintains its penetrator function - thereby resolving the contradiction between structural simplicity and range performance.
Solution Approach 2:
The warhead is extracted as a separate component from the motor assembly, allowing the motor to be optimized for weight and range while the warhead is optimized for penetration. The flexible coupling connects these separate components, enabling the motor to achieve higher speeds without the weight penalty of an integrated warhead.
3Device complexity
If conventional rocket casing material is used, then the structure is simple, but the material does not do as much damage as desired upon fragmentation and impact with a target
Solution Approach 1:
The casing is constructed from composite materials including metal flechettes embedded in a polymer matrix. The metal flechettes provide enhanced fragmentation and impact damage capability compared to conventional homogeneous materials, while the composite structure maintains manufacturing simplicity.
Solution Approach 2:
The casing incorporates metal flechettes at specific locations where enhanced damage capability is needed, rather than using uniformly strong material throughout. This local reinforcement approach provides maximum damage effectiveness while minimizing overall structural complexity and manufacturing cost.
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 flechette-based projectile design enhances impact energy, structural integrity, and damage effectiveness while reducing production costs and quality control requirements, enabling higher thrust and expanded target engagement capabilities.
Implementation Method 1
a casing made of multiple flechettes that act as both a reaction chamber and reinforcement, allowing for increased internal pressure, structural rigidity
Implementation Method 2
flechettes dispersing upon detonation to increase impact energy and kill zone size
Data Source
AI summary
Some embodiments pertain to a projectile that includes a propellant and a casing that encloses the propellant such that the casing acts as a reaction chamber during flight of the projectile. The casing includes a plurality of flechettes. When the projectile strikes (or is near) a target, a large internal sheer pressure forms within the casing. This sheer pressure causes the flechettes to sheer apart at the thinnest sections of the casing. Once the thin sections of the casing are sheered apart, the flechettes will be unconstrained such that the flechettes take individual flight paths.