Multi-Airfoil Wing Design for Yaw Stability
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Solution Overview
Problem
Rear wings on high-performance automobiles often suffer a significant loss of downforce during yaw due to turbulence and require excessive weight for structural strength, which raises the center of gravity and compromises stability and control, while also failing to balance aesthetics and aerodynamics effectively.
Innovation Solution
A multi-airfoil element wing design featuring a central single-airfoil element and outer dual-airfoil elements, mounted above the rear surface of the vehicle using stanchions, with a carbon fiber resin hollow body and smooth transitions, maintains downforce in yaw and provides favorable weight-to-strength ratio and aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a rear wing is designed to properly balance downforce and other considerations for straightaway performance, then downforce is optimized for straightaway travel, but the wing suffers a precipitous loss of downforce when in yaw (cornering)
Solution Approach 1:
The wing is divided into multiple airfoil elements (central airfoil element and outer airfoil elements) that are independently positioned and angled. Each element can respond differently to yaw conditions, with the outer elements being angled outward to specifically address turbulent flow during cornering, while the central element maintains optimal straightaway performance.
Solution Approach 2:
Different portions of the wing have different geometric properties - the central airfoil element has a specific camber and angle optimized for straightaway travel, while the outer airfoil elements are angled outward at different angles to handle the turbulent flow conditions experienced during yaw and cornering, creating local optimizations for different operational conditions.
2Reliability
If the wing is spaced sufficiently above the rear surface to minimize turbulence and permit aerodynamic shaping, then aerodynamic performance is improved, but the weight-to-strength ratio increases requiring excessive weight for structural strength
Solution Approach 1:
The wing structure utilizes composite materials (such as carbon fiber reinforced polymers) that provide high strength-to-weight ratio, enabling the wing to maintain sufficient structural strength at the desired spacing distance above the rear surface without excessive weight, thus preserving both aerodynamic performance and vehicle weight constraints.
3Force
If the wing is mounted at a distance above the rear surface to minimize turbulence, then aerodynamic effect is improved, but the center of gravity of the vehicle is raised creating stability negatives
Solution Approach 1:
The wing is segmented into multiple elements that can be positioned at different heights and angles. This allows the overall wing structure to generate sufficient downforce while distributing the weight more favorably, and the segmented design enables each element to be optimized for its specific position, reducing the need for excessive overall wing weight that would raise the center of gravity.
4Force
If visual aesthetics are improved to enhance desired aerodynamic effect, then downforce is improved, but the design complexity increases
Solution Approach 1:
The functional requirements for downforce generation and the aesthetic requirements are merged into a unified multi-element airfoil design. The segmented structure with different element angles and positions achieves both aerodynamic performance and visual appeal, where the aesthetic form directly serves the aerodynamic function rather than being a separate decorative element.
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 multi-airfoil wing design maintains downforce generation during yaw, optimizes weight distribution, and enhances visual aesthetics, ensuring improved stability and control without increasing the vehicle's center of gravity, while providing substantial aerodynamic benefits.
Implementation Method 1
The single-piece member includes a carbon fiber resin hollow body forming at least a portion of the central single-airfoil element and both of the outer dual-airfoil elements
Implementation Method 2
The single-piece member defines aerodynamic surfaces of the central airfoil element and both of the outer dual-airfoil elements
Data Source
AI summary
A multi-airfoil element wing includes a central single-airfoil element and an outer dual-airfoil element positioned outboard of each side of the central single-airfoil element. The single-piece member defines aerodynamic surfaces of the central airfoil element and both of the outer dual-airfoil elements. The single-piece member includes a carbon fiber resin hollow body forming at least a portion of the central single-airfoil element and of both outer dual-airfoil elements.