Deployable Blade Broadhead Aerodynamic Stability
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Solution Overview
Problem
Existing broadhead designs suffer from inferior aerodynamic properties due to deployable blades that can cause the arrow to veer off course during flight, compromising accuracy and performance.
Innovation Solution
A broadhead design featuring a plurality of deployable blades rotatably coupled to a ferrule with channels, where the blades are retained in a retracted configuration during flight by a collar, which disintegrates upon impact, allowing the blades to rotate and deploy tangentially, exposing cutting edges to create a bore and widen the wound.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If deployable blades are used in broadhead design, then cutting capability is improved, but aerodynamic performance deteriorates
Solution Approach 1:
The broadhead employs deployable blades that can change their configuration dynamically - remaining retracted during flight for aerodynamic efficiency and deploying upon impact for maximum cutting capability. This dynamic transformation allows the same structure to optimize for different operational phases.
Solution Approach 2:
The broadhead is divided into a ferrule body and separate deployable blade components. The blades are segmented and can be independently positioned - either retracted within the ferrule during flight or deployed outward during hunting, allowing the system to resolve the contradiction between aerodynamic performance and cutting capability.
2Stability of the object's composition
If deployable blades are retained in retracted configuration during flight, then aerodynamic stability is improved, but cutting effectiveness is reduced
Solution Approach 1:
The broadhead transitions from a static design to a dynamic one where blades can change position based on operational needs. During flight, blades remain retracted for stability; upon impact, they deploy for cutting effectiveness, allowing the system to optimize for each phase.
Solution Approach 2:
The blades are pre-positioned in a retracted configuration before flight to ensure aerodynamic stability. Upon impact, the preliminary positioning allows for rapid deployment of the cutting edges, ensuring both flight stability and subsequent cutting effectiveness are achieved.
Data Source
AI summary
A cut-on-contact broadhead having a plurality of deployable blades rotatably coupled to a surface of a ferrule, and a plurality of channels disposed on the surface of the ferrule. At least a portion of each channel is defined at least in part by at least a portion of the ferrule and at least a portion of at least one of the plurality of blades. Each blade includes a tip, an impact shoulder, and a first and second cutting edges. During flight, the blades are in a fully retracted configuration forming a distal tip having sharp cutting edges defined at least in part by the first cutting edges of the blades. Upon impact, the distal tip initiates a bore in the target, the plurality of blades deploy into a swept-back configuration, and the second cutting edges expand and lengthen the bore initiated by the distal tip.