Bullet Inlet and Outlet Channels for Drag Reduction

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Solution Overview

Problem

Conventional bullet designs face challenges with air resistance and drag, which reduce range and accuracy over long distances, as they do not actively manage air flow for performance enhancement.

Innovation Solution

A bullet design featuring an inlet channel and strategically positioned outlet channels that channel air flow to optimize aerodynamic properties, reducing drag and enhancing stability and accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If conventional solid nose or pointed tip design is used, then aerodynamic efficiency is improved, but air flow management is worsened leading to increased drag

Engineering Contradiction:
Improveaerodynamic efficiencyVSAvoidair resistance
Core Design Contradiction:
SpeedVSObject-affected harmful factors

Solution Approach 1:

The patent converts the harmful air resistance into a beneficial force by introducing inlet and outlet channels that channel air flow through the bullet body. The air entering through the inlet channel and exiting through outlet channels creates a low pressure zone that reduces overall drag, transforming the previously harmful air interaction into a useful aerodynamic advantage

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent segments the bullet body by introducing multiple inlet channels (including a primary inlet on the nose and secondary inlets on the flanks) and multiple outlet channels distributed around the bullet circumference. This segmentation allows for optimized air flow distribution and management throughout the bullet structure

Inventive Principle:
Principle #1Segmentation

2Ease of manufacture

If conventional bullet design is used, then manufacturing simplicity is maintained, but air flow management capability is reduced

Engineering Contradiction:
Improvemanufacturing simplicityVSAvoidair flow management structure
Core Design Contradiction:
Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent modifies the physical parameters of the bullet by incorporating channels with specific geometric characteristics - inlet channels with particular angles and positions, outlet channels with optimized spacing and orientation. These parameter changes enable improved air flow management while maintaining compatibility with conventional manufacturing processes

Inventive Principle:
Principle #35Parameter changes

3Device complexity

If traditional bullet design is used, then structural simplicity is maintained, but velocity and range are reduced over long distances

Engineering Contradiction:
Improvestructural simplicityVSAvoidvelocity
Core Design Contradiction:
Device complexityVSSpeed

Solution Approach 1:

The patent ensures continuous air flow through the bullet by designing inlet and outlet channels that maintain smooth airflow from the nose through the body to the rear. This continuous air channeling prevents turbulence and maintains aerodynamic efficiency throughout the bullet's flight path, sustaining velocity over long distances

Inventive Principle:
Principle #20Continuity of useful action

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 design increases velocity, stability, and accuracy by managing air flow to reduce drag, offering improved performance over traditional designs.

Implementation Method 1

The inlet channel serves as an entry point for air as the bullet travels forward. Instead of allowing the air to merely push against the bullet and create drag, this design channels the air through the body of the bullet. The air then exits through the outlet channels

Methodology Applied
Scientific EffectAir flow management:

Implementation Method 2

By managing the air flow in this manner, the design aims to reduce the overall drag force on the bullet

Methodology Applied
Scientific EffectDrag reduction: Drag

Data Source

PatentUS12449240B2Bullet comprising inlet and outlet channels
Publication Date: 2025.10.21 ALQAHTANI ALI MOHI SAEED
  • US12449240B2 patent drawing
  • US12449240B2 patent drawing
  • US12449240B2 patent drawing

AI summary

A bullet having an inlet channel and a plurality of outlet channels wherein, during flight, air enters into the bullet through the inlet channel and is expelled through the outlet channels. The inlet channel traverses from the leading edge of the bullet into a proximal point in the bullet, wherein the inlet channel branches off into the plurality of outlet channels. The outlet channels expel air through the lateral sides of the bullet.