Arrow Stabilizing Vane Airfoil Design for Wind Deviation
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Solution Overview
Problem
Existing stabilizing vanes for arrows are prone to significant deviations due to wind, which affects the accuracy and spin of the arrow during flight.
Innovation Solution
A stabilizing vane with a base and aerodynamic body featuring a variable thickness and NACA profile airfoil design, which reduces aerodynamic resistance and increases arrow spin, comprising a base connected to the arrow shaft and a body extending along orthogonal directions with a convex upper and concave lower surface, optimized for reduced deviation and enhanced accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional stabilizing vanes with shield or parabolic profile are used, then the arrow achieves stable flight, but the arrow is subject to significant wind deviations
Solution Approach 1:
The patent changes the aerodynamic parameters of the vane body by adopting an airfoil cross-section with specific geometric characteristics (camber ratio between 8-15%, thickness ratio between 9-18%). This parameter optimization reduces wind sensitivity while maintaining flight stability, resolving the contradiction between stability and wind resistance.
Solution Approach 2:
The patent applies curved surface geometry through the airfoil cross-section design, where the convex upper surface and concave lower surface create smooth aerodynamic contours. This curvature optimization reduces turbulence and wind-induced deviations while preserving stabilizing functionality.
2Stability of the object's composition
If vane body with larger surface area is used to improve stability, then the arrow rotates less during flight, but the aerodynamic resistance increases reducing arrow speed
Solution Approach 1:
The patent optimizes the ratio between vane body surface area and arrow shaft diameter (0.03 to 0.08), and controls the camber and thickness ratios of the airfoil section. These parameter changes enable sufficient rotational stability without excessive drag, maintaining high arrow speed.
Solution Approach 2:
The patent applies different geometric characteristics to different parts of the vane body - the airfoil cross-section provides optimized local aerodynamic properties with varying thickness and camber distribution along the span, achieving efficient balance between stability and speed.
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 vane design results in lower aerodynamic resistance and increased arrow spin, reducing deviation and enhancing shot accuracy without compromising speed.
Implementation Method 1
a body (3) connected to said base (2) and extending along a second direction (Y) orthogonal to the first direction (X), said body (3) having an airfoil shape, characterised in that said body (3) has a convex upper surface (61) and a concave lower surface (62)
Implementation Method 2
said body (3) has a convex upper surface (61) and a concave lower surface (62), said convex upper surface (61) and said concave lower surface (62) being arranged such that they generate a lift L
Implementation Method 3
said body (3) has a thickness in said third direction (Z) which is variable along said first direction (X) and along said second direction (Y)
Data Source
AI summary
A stabilising vane for arrows is described, which comprises:a base shaped to be connected at a tail of a shaft of an arrow, wherein the base extends along a first direction between a first and a second end; where the first direction coincides with the flight direction of the vane when the arrow is in flight;a body connected to the base and extending away from the base substantially along a second direction starting from a first point positioned at a marginal position of a first side positioned at the first end and from a second point positioned at a marginal position of a second side positioned at the second end of the base; wherein the body further extends between a third side and a fourth side of the base; the first point and the second point facing the fourth side, the body has an airfoil having a convex upper surface and a concave lower surface; the body has a variable thickness.