Projectile Guide Sabot with Segmented Driving Element
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Solution Overview
Problem
Existing sub-caliber projectiles have complex and heavy driving elements in their discarding sabots, leading to high production complexity and weight, which complicates their assembly and reduces efficiency.
Innovation Solution
A sub-caliber projectile design featuring a segmented, hollow-cylindrical guide sabot with a transverse metal plate driving element, mounted in an annular groove, utilizing a central aperture hole that maximizes gas pressure action for acceleration, and optionally incorporating a lightweight metal or plastic construction for reduced weight and simplified production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a solid metal plate driving element is used, then the projectile can be accelerated effectively, but the driving element becomes heavy and complex to produce
Solution Approach 1:
The driving element is segmented into a two-part construction: a lightweight hollow cylindrical shell and a separate disc-shaped acceleration plate. This segmentation allows each component to be optimized independently - the shell provides structural support while the plate provides acceleration surface, reducing overall weight compared to a solid metal plate.
Solution Approach 2:
The driving element incorporates a hollow cylindrical shell with thin walls instead of a solid metal plate. This thin-walled structure maintains sufficient structural integrity for guiding and supporting the projectile while dramatically reducing the weight of the driving element.
2Strength
If a thick-walled driving element is used, then structural strength is improved, but production complexity and weight increase
Solution Approach 1:
The driving element is divided into a hollow cylindrical shell and a separate disc plate. The shell can be produced by simple drawing or stamping processes from sheet metal, while the plate is a separate pressed component. This segmentation simplifies production compared to machining a thick-walled solid structure, and both parts can be joined by simple riveting or welding.
Solution Approach 2:
The hollow cylindrical shell with thin walls provides sufficient structural strength through its geometric form and material selection, eliminating the need for thick walls. The thin-walled construction simplifies production while maintaining the necessary strength for guiding and supporting the projectile during acceleration.
3Stability of the object's composition
If a solid metal plate driving element is used, then the projectile can be guided stably, but the dead load proportion increases
Solution Approach 1:
The driving element is segmented into a lightweight hollow shell and a separate acceleration plate. This segmentation reduces the overall weight and dead load proportion of the driving element while the hollow shell maintains the guiding function for stable projectile flight.
Solution Approach 2:
The hollow cylindrical shell with thin walls provides the necessary guiding structure for stable projectile flight while minimizing weight. The thin-walled construction reduces dead load proportion compared to solid metal plate designs while maintaining adequate structural support.
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 results in a lighter-weight projectile with simplified production and assembly, leveraging gas pressure for efficient acceleration, while maintaining stability and centering, suitable for both live and blank projectiles.
Implementation Method 1
the central aperture hole (11), whose diameter (12) is as large as possible but is less than the maximum diameter (13) of the truncated-conical recess (5) in the fin assembly (4)... the propellant gases, on firing the corresponding munition, can act directly on the rear planar end surface of the projectile
Data Source
AI summary
The invention relates to a subcaliber projectile, particularly for a dart projectile, having a resistance-stabilizing, conically designed guide mechanism having a frustum-shaped recess, wherein a guide cage has a substantially hollow cylindrical design in which a propulsion element is integrated therein on a rear side. To allow the propulsion element to be produced in a simple fashion and the guide cage to be lighter weight than comparable known drive cages, the propulsion element is designed substantially only as a disk-shaped metal plate extending transverse to the longitudinal axis of the guide cage, wherein the drive element is mounted on an edge in an annular groove-shaped recess of the inner wall of the guide cage, wherein the disk-shaped metal plate comprises a central through hole, the diameter of which is as large as possible, but smaller than the maximum diameter of the frustum-shaped recess of the guide mechanism.