Flexible Wing Leading Edge Cover for Debris Protection
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Solution Overview
Problem
Existing aircraft wing designs struggle to maintain laminar airflow due to surface roughness caused by dirt, debris, and erosion, leading to increased drag and maintenance challenges.
Innovation Solution
A flexible cover movable between extended and retracted positions is integrated into the wing assembly, protecting the leading edge from erosion and debris while allowing the wing to be cleaned and exposed to airflow as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a wiper arrangement is provided to clean the wing, then debris can be removed from the wing surface, but the leading edge is not protected from microscopic chipping and denting, and the cleaning reliability is insufficient
Solution Approach 1:
A flexible cover is introduced as an intermediary protective layer between the leading edge and the external environment. This cover prevents direct contact between debris/erosion and the leading edge surface, while still allowing the wing to maintain its aerodynamic function. The cover acts as a sacrificial protective element that can be replaced without damaging the underlying wing structure.
Solution Approach 2:
The flexible cover provides beforehand protection against erosion and debris impact before they can cause damage to the leading edge. By placing this protective layer in advance, the wing surface is cushioned against microscopic chipping and denting that would otherwise occur during normal flight operations.
2Object-generated harmful factors
If elastic coverings are stretched to loosen debris build-up, then some cleaning effect is achieved, but the coverings are as prone to or more prone to microscopic damage from debris
Solution Approach 1:
The flexible cover is designed as a replaceable, consumable component that protects the expensive, long-lasting leading edge. Instead of attempting to make the cover durable against all forms of damage, the system accepts that the cover will deteriorate and requires periodic replacement, while the underlying wing structure remains protected and maintains its service life.
3Object-generated harmful factors
If known cleaning arrangements are provided, then debris removal capability is achieved, but the arrangements are often heavy, complex, and in need of particularly stringent maintenance
Solution Approach 1:
The invention extracts the protective function from the complex cleaning system and separates it as an independent flexible cover component. This allows the protection function to be provided by a simple, lightweight cover that can be independently replaced, eliminating the need for complex wiper mechanisms, motors, and control systems while maintaining effective debris protection.
Data Source
AI summary
A wing assembly has a flexible cover which is movable between an extended position and a retracted position. In the extended position the flexible cover covers the leading edge of the wing assembly, thereby protecting the front of the wing assembly from impact by dirt or debris and preserving the smoothness of its surface. In the retracted position the flexible cover does not cover the leading edge of the wing assembly.