Turbine Projectile Apparatus for Smooth Bore Spin Stabilization
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Solution Overview
Problem
Current firearms ammunition for smooth bore barrels lacks effective spin-stabilization, leading to reduced accuracy and range due to drag and tumbling issues, especially for full-caliber and sub-caliber non-finned projectiles.
Innovation Solution
A projectile apparatus that converts gas pressure from propellant combustion into high spin rates using turbine structures within the smooth bore barrel, achieving spin rates greater than 30,000 RPM, with features like fins, vents, and channels directing combustion gases into turbine elements to stabilize the projectile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a smooth bore barrel is used, then the firearm is simpler and cheaper, but the projectile lacks spin-stabilization and tumbles, reducing accuracy and range
Solution Approach 1:
A turbine element is introduced as an intermediary component between the propellant combustion and the projectile. The turbine element converts gas pressure into rotational motion, which is then transferred to the projectile, providing spin-stabilization without requiring a rifled barrel.
Solution Approach 2:
The mechanical system of rifled barrel grooves that traditionally impart spin to the projectile is replaced with a gas-driven turbine element. This substitution allows smooth bore barrels to achieve the same spin-stabilization effect through a different mechanism.
2Manufacturing precision
If a rifled barrel is used to provide spin-stabilization, then accuracy and range improve, but cost increases and bird/buck shot performance deteriorates due to hollow ring patterns
Solution Approach 1:
The turbine element provides a universal solution that works for both smooth bore shotguns and rifles. It enables spin-stabilization for long-range projectiles while maintaining compatibility with smooth bore barrels, allowing the same system to serve multiple purposes without requiring barrel modifications.
3Loss of energy
If sub-caliber non-finned projectiles are used, then drag is reduced and range increases, but spin-stabilization becomes difficult to achieve in smooth bore barrels
Solution Approach 1:
The invention uses pneumatic principles by directing propellant combustion gases through the turbine element to generate rotational force. This gas-driven mechanism provides effective spin-stabilization for sub-caliber projectiles without requiring traditional mechanical rifling, thereby reducing drag while maintaining stability.
4Stability of the object's composition
If fins are added to the projectile for stabilization, then spin-stabilization is achieved, but drag increases and the projectile becomes less efficient
Solution Approach 1:
The invention extracts the spin-stabilization function from the projectile itself (by removing fins) and relocates it to a separate turbine element that converts gas pressure into rotational motion. This separation allows the projectile to maintain a streamlined, low-drag profile while still achieving stabilization through the turbine-generated spin.
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 enables accurate and extended-range firing of non-finned projectiles by converting potential energy into kinetic rotational energy, reducing drag and maintaining velocity, thus overcoming the limitations of smooth bore barrels.
Implementation Method 1
the propellant comprising a combustible material that produces exhaust gases when burned
Implementation Method 2
one or more elements or features for converting gas pressure or velocity from the propellant, as the propellant is burned, to a high rate of projectile spin
Implementation Method 3
one or more elements or features for converting gas pressure or velocity from the propellant, as the propellant is burned, to a high rate of projectile spin within a smooth bore barrel
Data Source
AI summary
A projectile apparatus is provided that includes a projectile, a propellant, and optional components such as a wading, a sabot, and an intermediary device. The projectile can be fired through a barrel having a smooth bore. A sabot is provided that can include molded features, for example, a base portion and a plurality of petal portions defining, in-part, a volume for accommodating a projectile. The sabot and wadding can include molded features that control and direct gases produced by the propellant. The apparatus can convert gas pressure or gas velocity into a high rate of projectile spin. The projectile has long-range accuracy due to a high or sustainable velocity and high rate of spin.