Fin-Stabilized Projectile for Higher Velocity and Lower Barrel Wear

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Solution Overview

Problem

Spin-stabilized projectiles waste energy for spin induction, leading to reduced velocity and increased barrel wear, limiting their effectiveness and accuracy, especially in long-range engagements.

Innovation Solution

Fin-stabilized projectiles utilize aerodynamic fins to maintain stability without barrel engagement, allowing for higher velocities and reduced drag, thus enhancing energy delivery and accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If spin stabilization is used through rifled barrel engagement, then gyroscopic stability and orientation maintenance are improved, but energy available for projectile velocity is reduced and barrel wear increases

Engineering Contradiction:

Improveprojectile stabilityVSAvoidenergy for velocity

Core Design Contradiction:

Stability of the object's compositionVSUse of energy by moving object

Solution Approach 1:

The patent replaces the mechanical spin stabilization system (rifled barrel engagement) with an aerodynamic fin stabilization system. The fins generate stabilizing aerodynamic forces during flight without requiring mechanical engagement with the barrel, thus eliminating the energy loss associated with spin induction while maintaining projectile stability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent extracts the stabilization function from the barrel-proj ectile interaction system and relocates it to the projectile's fin system. By removing the dependency on rifled barrel engagement for stabilization, the energy previously consumed by spin induction is now available for increasing projectile velocity.

Inventive Principle:

Principle #2Taking out (Extraction)

2Stability of the object's composition

If spin stabilization is used through rifled barrel engagement, then gyroscopic stability is improved, but barrel wear increases

Engineering Contradiction:

Improveprojectile stabilityVSAvoidbarrel wear

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical contact-based spin stabilization system with an aerodynamic fin stabilization system. This eliminates the friction and mechanical wear between the projectile and rifled barrel surfaces, significantly reducing barrel wear while maintaining projectile stability through aerodynamic forces.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent removes the stabilizing contact between the projectile and the rifled barrel, extracting the stabilization function from the barrel-proj ectile interface and relocating it to the projectile's fin system. This eliminates the harmful wear effect on the barrel while preserving the essential stabilization function.

Inventive Principle:

Principle #2Taking out (Extraction)

3Use of energy by moving object

If fin stabilization is used, then energy for velocity and reduced barrel wear are improved, but spin-induced gyroscopic stability is lost

Engineering Contradiction:

Improveenergy for velocityVSAvoidprojectile stability

Core Design Contradiction:

Use of energy by moving objectVSStability of the object's composition

Solution Approach 1:

The patent substitutes the mechanical spin-induced gyroscopic stability with aerodynamic fin stabilization. The fins generate stabilizing moments through aerodynamic forces that act on the projectile during flight, providing the necessary stability without requiring spin induction and thereby preserving energy for velocity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the stabilization mechanism from spin-based gyroscopic stability to aerodynamic fin-based stability. This parameter change in the stabilization approach allows the system to achieve stability through a different physical mechanism that does not consume the energy available for velocity.

Inventive Principle:

Principle #35Parameter changes

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

Fin-stabilized projectiles achieve increased muzzle velocity, improved accuracy, and reduced barrel wear, enabling greater impact energy and stability across various weapon systems.

Implementation Method 1

Fin stabilized projectiles include at least one fin configured to stabilize the projectile during external ballistics

Methodology Applied

Scientific EffectAerodynamic stabilization: Aerofoil

Implementation Method 2

the elongate body having a diverging ogival nose segment extending rearward from the body leading end and a converging ogival back segment terminating at the body trailing (converging) end

Methodology Applied

Scientific EffectAerodynamic drag reduction: Drag

Data Source

PatentUS20250271245A1FIN stabilized projectile

Publication Date: 2025.08.28 CROSSBULLET LLC

AI summary

The present disclosure provides a fin stabilized projectile which can accommodate subsonic and supersonic flight velocities, wherein flight performance characteristics of the projectile are stabilized. The projectile is configured to be incorporated into a sabot free cartridge, wherein the projectile can be launched from a smooth bore barrel. The projectile includes an elongate body having a diverging ogival nose section extending rearward from a leading end, a converging ogival back section terminating at a trailing end; and a tail segment having a tail fin projecting radially from the back section and extending longitudinally forward of the trailing end of the elongate body and extending longitudinally rearward of the trailing end of the elongate body.