Paper Bullet Casing With Twisting Grooves For Smooth Bore Stability
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Solution Overview
Problem
Existing solid bullets for smooth bore hunting guns suffer from poor aerodynamic characteristics, leading to inaccurate and ineffective shots due to deformation and lack of longitudinal stability, resulting in insufficient kinetic energy and spread at longer ranges.
Innovation Solution
A bullet shell casing made of paper with wax-coated ends and four twisting grooves in a cross pattern, combined with a plastic compression cone, provides rotation and stability to the bullet, ensuring accurate and effective shots by preventing gas blow-back and maintaining kinetic energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hollow bullet with twisting grooves is used for smooth bore hunting guns, then the bullet can be fired from smooth bore barrels, but the bullet deforms upon hitting the barrel sides, losing accuracy and longitudinal stability
Solution Approach 1:
The invention uses a spherical bullet shape instead of traditional hollow bullets with grooves. The spherical shape allows the bullet to rotate smoothly within the smooth bore barrel without deforming, maintaining accuracy and longitudinal stability while achieving compatibility with smooth bore firearms.
2Device complexity
If traditional bullet designs are used, then the structure is simple, but aerodynamic resistance increases and flight speed decreases, reducing kinetic energy conservation
Solution Approach 1:
The spherical bullet design provides superior aerodynamic characteristics compared to traditional flat-based bullets. The curved spherical shape reduces aerodynamic resistance during flight, maintains higher flight speeds, and conserves kinetic energy over distance, all while keeping the structure relatively simple.
3Adaptability or versatility
If buckshot is used instead of solid bullets, then the ammunition can be fired from smooth bore guns, but the pellets spread apart after exiting the barrel, reducing accuracy and effectiveness at longer ranges
Solution Approach 1:
The invention combines the benefits of solid bullets (accuracy, kinetic energy) with compatibility for smooth bore firearms. By using a spherical solid bullet design that rotates smoothly in smooth bore barrels, it achieves both the adaptability of buckshot and the precision of solid bullets at extended ranges.
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 solution enhances external ballistics, providing improved accuracy and stopping power at ranges up to 75 meters, surpassing previous designs by maintaining bullet alignment and kinetic energy, ensuring more effective hunting with smooth bore shotguns.
Implementation Method 1
As the bullet is passing through the barrel, the bullet hits the sides of the barrel, and becomes deformed
Implementation Method 2
the casing has four twisting grooves 4 mm wide and 2 mm deep are arranged in a cross pattern at the nose of said casing
Data Source
AI summary
Disclosed is a bullet shell casing for smooth bore hunting guns. The shell casing comprises of a casing made of paper with the ends coated in wax. On its surface, the casing has four twisting grooves the length of the casing. The casing enclosing the bullet is made of identical longitudinal halves having a cylindrical outer surface and an inner surface matching with the surface of the bullet or bullets. The casing has inverted cone indentions at each end of the casing. A plastic compression cone is matched with the rear indention of the casing. Compression cone and casing are fitted into a shell that is not crimped at the end of said shell. The bullet shell casing offers improved longitudinal stability, longer range, and effectiveness.