Fin-Stabilized Flechette Projectile With In-Flight Solid Fuel Propulsion
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Solution Overview
Problem
Conventional flechettes require sleeve seals and rifling grooves, limiting muzzle velocity and accuracy, especially over long distances, and are inefficient in large-caliber weapons.
Innovation Solution
A flechette projectile with a solid fuel combustion chamber and tail fins for stabilization, allowing smooth-bore barrel use, achieving higher muzzle velocities and improved accuracy through combustion gas propulsion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional flechettes use sleeve seals and rifling grooves, then they can be fired from rifled barrels, but muzzle velocity is limited and accuracy deteriorates over long distances
Solution Approach 1:
The projectile is divided into a core and a separate stabilizing fin assembly. The fins are initially contained within the core and deployed after firing, allowing the projectile to exit the barrel without rifling interference while still achieving stabilization in flight.
Solution Approach 2:
The stabilizing fins are pre-positioned inside the core in a compact configuration before firing. This preliminary arrangement allows the projectile to be fired smoothly from a smoothbore barrel without the fins interfering with the rifling, and the fins are then deployed to their operational position after the projectile exits the barrel.
2Stability of the object's composition
If conventional flechettes use sleeve seals and rifling grooves, then they can be stabilized in flight, but device complexity increases with unnecessary components
Solution Approach 1:
The stabilizing fins are extracted from the traditional sleeve seal configuration and repositioned to be contained within the core. This eliminates the need for complex sleeve seals and rifling grooves, simplifying the overall projectile structure while maintaining flight stability through the deployed fin configuration.
3Productivity
If conventional flechettes are used in large-caliber weapons, then they can be fired, but efficiency decreases and accuracy is limited
Solution Approach 1:
The projectile design with internal fin deployment is universally applicable across different caliber weapons, particularly benefiting large-caliber smoothbore weapons. The same basic structure achieves both the high velocity required for large-caliber efficiency and the accuracy needed for precise targeting, regardless of the specific weapon system.
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
Enhances projectile velocity and stability, eliminating rifling effects, and provides a stable trajectory with a double impact mechanism for enhanced penetration.
Implementation Method 1
the combustion of a solid fuel occurring in a combustion chamber inside the projectile
Implementation Method 2
The combustion gases maintain the velocity of the projectile or even accelerate it
Implementation Method 3
which tail fin stabilizes the trajectory of the projectile after the projectile exits from the barrel
Implementation Method 4
the powder gas produced in conjunction with firing pushes the tail fin out from the rear of the projectile
Implementation Method 5
A rotating motion like the motion brought about by rifling grooves can be induced in the projectile by the shaping of the tail fins
Data Source
AI summary
A projectile including a jacket, a core and a stabilizer part, the stabilizer part including a shaft and a fin part fastened to the shaft at the first end of the stabilizer part, whereby in the core of the projectile is a cylindrical cavity, which is closed at least partly with a shutoff part in which shutoff part is an aperture for the shaft of the stabilizer part, whereby a piston is fastened to the second end of the shaft of the stabilizer part, which piston is disposed in a cavity for forming a space at the front end of the piston and through the shaft of the stabilizer part a channel passes into the space and in the front part of the cavity is a solid fuel, which is made to ignite by means of the powder pressure produced in conjunction with firing of the projectile.