Modular Test Vehicle With Replaceable Rotating Band
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Solution Overview
Problem
Current test vehicles for projectiles are non-reusable due to engraved rotating bands, leading to significant costs and waste, as each requires a new band for every shot, limiting the feasibility of serial reuse and increasing testing expenses.
Innovation Solution
A modular test device with a rapidly replaceable, low-cost rotating band mechanism that allows for easy replacement without specialized equipment, enabling the reuse of other components and reducing waste by only requiring inexpensive rotating band replacements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional test vehicle with a fixed rotating band is used, then the projectile can be fired with proper spin stabilization, but the entire test vehicle must be discarded after one use due to the engraved rotating band
Solution Approach 1:
The test vehicle is divided into modular segments including a reusable body and a replaceable rotating band component. The rotating band is attached to the projectile body through a mechanism that allows rapid removal and replacement, enabling the band to be exchanged while retaining the expensive projectile body for subsequent uses.
Solution Approach 2:
Instead of discarding the entire test vehicle after one use, only the rotating band component is discarded or replaced, while the projectile body is recovered and reused. This selective discarding approach minimizes waste and reduces testing costs by preserving the reusable portions of the test vehicle.
2Reliability
If a new test vehicle is created for each test shot, then proper testing can be conducted, but costs increase significantly due to the need for multiple complete test vehicles
Solution Approach 1:
The test vehicle is segmented into reusable and consumable components. The projectile body, which contains expensive instrumentation and structural elements, is separated from the rotating band, allowing the body to be reused across multiple tests while only the inexpensive rotating band needs replacement.
Solution Approach 2:
The reusable projectile body is designed to accommodate multiple rotating bands and can be used for various testing configurations. This universal design allows a single projectile body to serve multiple testing purposes, reducing the overall number of complete test vehicles needed.
3Device complexity
If the rotating band is permanently attached to the projectile body, then the structure is simple, but the entire projectile must be replaced after each firing
Solution Approach 1:
The attachment mechanism transitions from a permanent static connection to a dynamic reusable connection. The rotating band is attached through a mechanism that allows it to be securely fixed during firing yet easily removed afterward, enabling rapid replacement and high-speed repetition of tests without complex assembly procedures.
Solution Approach 2:
The attachment mechanism is designed to facilitate self-service replacement of the rotating band. The system includes features such as quick-release latches, threaded interfaces, or bayonet mounts that allow operators to rapidly exchange rotating bands without requiring specialized tools or extensive technical expertise, thereby increasing test repetition rate.
Data Source
AI summary
A modular constructed, standardized test device for simulating a spin stabilized projectile which is fired from a barrel having rifling grooves, comprised of the bolted together, keyed to transfer spin, modular components of replaceable rotating band, replaceable front end and back end, and filler sections for further simulation of other components. The front end has an interior recessed area which allows for a selective integration of a threaded fuze or an aerodynamic, electronic, or other structure and the rear end has a crimp groove for selective attachment of a cartridge case, and aerodynamic or other structure to mimic the rear geometry of a projectile for testing purposes.