Elastic Aircraft Joint Fairing for EMI Sealing and Drag Reduction
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Solution Overview
Problem
Current aircraft fairings for structural joints are prone to damage and require frequent replacement or repair, leading to increased drag, maintenance costs, and electromagnetic interference issues due to their inability to withstand flight strains and low temperatures.
Innovation Solution
A multi-layer fairing system comprising an adhesive layer, a conductive elastic material layer, and a coating that can resume its original shape after deformation, providing an electromagnetic interference seal and reducing the need for frequent maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rubber compound and conductive paint are used for fairings, then the fairing can be applied to joints, but the fairing cannot withstand flight strains and low temperatures, requiring frequent removal and repair
Solution Approach 1:
The patent applies composite materials by combining multiple layers with different properties: an elastomeric adhesive layer for bonding and flexibility, a conductive elastic material layer for EMI shielding, and an elastomeric coating layer for environmental protection. This multi-layer composite structure allows each layer to contribute its specific properties, resulting in a fairing that can withstand flight strains and low temperatures while maintaining reliability and reducing maintenance frequency.
2Reliability
If fairings are removed and repaired regularly, then the fairing can maintain its function, but the aircraft experiences increased drag and fuel consumption during the non-service period
Solution Approach 1:
The patent applies beforehand cushioning by designing a fairing with elastomeric materials that can anticipate and withstand the strains and temperature variations encountered during flight. The elastic properties of the adhesive and coating layers allow the fairing to flex and recover during flight operations, preventing damage before it occurs and eliminating the need for frequent repairs that would otherwise increase drag and fuel consumption.
3Device complexity
If gaps are left at joints, then the joint structure remains simple, but electromagnetic interference penetrates the aircraft skin and interferes with electronics
Solution Approach 1:
The patent applies flexible shells and thin films by using a conductive elastic material layer within the fairing structure. This layer provides continuous electrical conductivity across the joint, sealing gaps and blocking electromagnetic interference from penetrating the aircraft skin. The flexible nature of the elastomeric materials allows the conductive layer to maintain contact and sealing effectiveness even when the joint experiences movement or strain during flight.
4Loss of energy
If a smooth surface is achieved over joints, then drag is reduced, but the surface must be maintained through frequent fairing repair or replacement
Solution Approach 1:
The patent applies dynamics by using elastomeric materials with elastic properties that allow the fairing to dynamically adapt to joint movements and strains during flight. The adhesive and coating layers can stretch and recover, maintaining a smooth surface profile even when the underlying joint structure moves. This dynamic capability eliminates the need for frequent repairs to maintain the smooth surface, thereby reducing drag without increasing maintenance frequency.
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 fairing system effectively maintains a smooth surface and electromagnetic interference seal under various flight strains and temperatures, reducing drag and maintenance needs, while withstanding deformation and temperature fluctuations.
Implementation Method 1
The adhesive layer is capable of resuming an original shape after being deformed... The coating covers the conductive elastic material layer and is capable of resuming the original shape after being deformed
Data Source
AI summary
A method and apparatus comprising an adhesive layer and a conductive elastic material layer. The adhesive layer is capable of being placed in a channel for a joint. The adhesive layer is capable of resuming an original shape after being deformed. A conductive elastic material layer is on the adhesive layer. The coating covers the conductive elastic material layer and is capable of resuming the original shape after being deformed.