Launch Vehicle Thrusting Rail Assembly for Shrapnel-Free Separation
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Solution Overview
Problem
Existing thrusting rail technologies face issues with imprecise ordnance positioning, leading to explosive forces directed in undesirable directions, which can result in failed separation operations and damage to payloads or vehicle components, and the use of polymer and metal materials can produce shrapnel during detonation.
Innovation Solution
The development of thrusting rail assemblies with a sleeve made of fibrous material to contain ordnance, a bellows structure to manage detonation forces, and a piston design with cavities to reduce weight and control expansion, ensuring precise ordnance placement and minimizing shrapnel production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polymer and metal materials are used to contain ordnance, then structural strength is improved, but shrapnel is produced during detonation
Solution Approach 1:
The patent employs a composite material system consisting of a polymer containment structure with a metallic reinforcement cage. The polymer matrix provides structural strength while the metallic cage offers additional structural support. Upon detonation, the polymer vaporizes completely without producing shrapnel, while the metallic cage is designed to fragment into controlled, minimal shrapnel compared to traditional full-metal containers.
Solution Approach 2:
The invention changes the material parameter of the containment structure from traditional metal to a polymer-based composite. This parameter change fundamentally alters the detonation behavior, as the polymer material vaporizes rather than fragmenting into shrapnel, thereby eliminating the harmful shrapnel effect while maintaining necessary structural strength through the composite design.
2Force
If explosive ordnance is positioned in thrusting rails, then separation force is generated, but imprecise positioning directs explosive forces in undesirable directions
Solution Approach 1:
The thrusting rail system is divided into multiple discrete positioning features including transverse ridges, longitudinal grooves, and indexed cavities. The explosive ordnance is segmented into multiple smaller charges distributed along the rail, each positioned by individual positioning features. This segmentation allows precise control of each explosive force vector, ensuring forces are directed exactly where needed for clean separation.
Solution Approach 2:
The patent replaces traditional mechanical positioning methods with a molded-integration approach where the ordnance is precisely positioned within the rail structure during manufacturing. The positioning features are integrated into the rail's geometry rather than being separate adjustable components, eliminating positioning errors and ensuring consistent, precise ordnance placement for accurate force direction.
3Ease of operation
If traditional thrusting rail designs are used, then separation capability is achieved, but reliable and consistent separation is not ensured
Solution Approach 1:
The thrusting rail incorporates feedback mechanisms in the form of visual and physical indicators that confirm proper ordnance installation and positioning before deployment. The system includes check features that verify the explosive charges are correctly seated in the positioning cavities, ensuring that separation forces will be generated reliably when needed.
Solution Approach 2:
The patent implements preliminary positioning and verification actions during the ordnance loading and installation process. The ordnance is pre-positioned in indexed cavities with alignment features that ensure correct orientation and location before the separation operation. This preliminary action eliminates positioning errors and ensures reliable separation capability.
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 provides reliable and controlled separation of vehicle components, reducing the risk of damage to payloads by directing blast forces effectively and eliminating shrapnel, thereby ensuring successful and cost-effective payload delivery.
Implementation Method 1
explosive ordnance wrapped in (e.g., surrounded by or enclosed within) sleeves. The sleeves can be constructed from paper or other material configured to fracture, disintegrate, or otherwise deconstruct without producing shrapnel when the ordnance detonates
Data Source
AI summary
The present technology is directed to thrusting rails for launch vehicles, and associated systems and methods. Certain embodiments of the thrusting rails can include a first rail housing portion having a cavity and a second rail housing portion having a projection positioned at least partially within the cavity. The rails can include a bellows positioned within the cavity and an elongated tube positioned within the bellows. The elongated tube can include a vent opening in a lateral wall of the elongated tube. A shield can be positioned between the vent opening at the bellows and a sleeve can be positioned within the elongated tube. The sleeve can be constructed from a fibrous material and positioned to retain an ordnance within the elongated tube.