Gyrostabilized Projectile Ogive Securing Mechanism
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Solution Overview
Problem
The existing connection between the ogive and the projectile body in gyrostabilized projectiles is prone to breaking under radial impacts during firing, leading to potential damage to the projectile and gun, and insufficient pressure for optimal ejection of the sub-projectiles.
Innovation Solution
A hollow projectile body with a cylindrical cup containing a piston and sub-projectiles, where the cup is secured to the body by weakened connecting means that break under pyrotechnic pressure, and the ogive is secured coaxially to the cup, allowing for axial ejection and distributing impact stresses to less loaded areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a fragile connection is used between the ogive and the projectile body to enable payload ejection, then the pyrotechnic charge can achieve sufficient pressure for optimal ejection, but the connection is prone to breaking under radial impacts during firing, causing projectile damage and gun damage
Solution Approach 1:
The connection system is divided into two separate functions: (1) the securing means coaxially connecting the ogive to the cup, and (2) the weakened connecting means radially connecting the cup to the body. This segmentation allows each connection to be optimized for its specific function - the coaxial connection handles ejection forces while the radial connection handles impact forces.
Solution Approach 2:
The connection geometry transitions from a radial arrangement (vulnerable to impact) to a coaxial arrangement (resistant to impact). The securing means extends along the longitudinal axis, distributing forces axially rather than radially, thereby resisting radial impacts while maintaining ejection capability.
2Ease of operation
If the fragile connection is located at the forcing cone area to enable ejection, then the pyrotechnic charge can push the payload effectively, but the location is heavily loaded by radial impacts when the projectile is rammed in the gun
Solution Approach 1:
The cup serves as an intermediary component between the ogive and the body. It provides a interface that allows the coaxial securing means to connect the ogive while the weakened connecting means attaches the cup to the body, separating the ejection function from the impact-stressed location.
Solution Approach 2:
Different parts of the connection system have different properties: the securing means is designed for strength along the axis to handle ejection, while the weakened connecting means is designed with calibrated weakness to break under pyrotechnic pressure but resist radial impact. Each location is optimized for its specific functional requirement.
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 ensures reliable ejection of the sub-projectiles and ogive while minimizing damage to the projectile and gun, maintaining structural integrity and achieving optimal pressure for dispersion.
Implementation Method 1
a base housing a pyrotechnic charge separated from the sub-projectiles by the piston
Implementation Method 2
the piston pushed by the gases generated by the pyrotechnic charge
Implementation Method 3
the cup is secured to the body by a weakened connecting means that is dimensioned to break under the force of the piston pushed by the gases generated by the pyrotechnic charge
Data Source
AI summary
A projectile includes a hollow body carrying a payload formed of inert sub-projectiles that can be dispersed on trajectory contained in a cup including a piston closing one of its ends, the body at its rear part with a base housing a pyrotechnic charge separated from the sub-projectiles by the piston, which can translate with respect to the body of the projectile to push the cup and the sub-projectiles axially out of the body. The cup is formed of independent sectors. The piston is secured to the sectors when contained in the body and the cup is secured to the body by a connecting apparatus weakened to break under the force of the piston pushed by the gases generated by the pyrotechnic charge. An ogive is secured to the cup by a securing apparatus that is coaxial with the longitudinal axis of the projectile and locked by the sectors.