Tiltrotor Spinner Fairing Shield for Bird Strike Protection
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Solution Overview
Problem
Traditional birdstrike protection systems for aircraft are heavy, expensive, and prone to damage from large impacts, as they require stiff and costly materials to absorb energy, which can lead to structural damage and increased loads on smaller components.
Innovation Solution
A tiltrotor controls shield with a wire or bladed substructure under a fragile spinner fairing that segments incoming projectiles into smaller, lower-energy elements, dispersing the impact across a wider area to protect rotor components without the need for reinforced fairings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional stiff and heavy materials are used to create a spinner fairing strong enough to withstand large bird strikes, then the protection capability is improved, but the weight and cost increase significantly
Solution Approach 1:
The shield structure divides the incoming projectile into multiple smaller segments using wire segments or bladed arms arranged in radial patterns. This segmentation transforms a single high-energy impact into multiple lower-energy impacts distributed across different locations, allowing the use of lighter materials while maintaining protection capability
Solution Approach 2:
The shield structure acts as an intermediary component positioned between the spinner fairing and the proprotor assembly. It absorbs and dissipates impact energy through the segmentation mechanism, protecting the underlying components without requiring the fairing itself to be heavily reinforced
2Reliability
If traditional stiff and heavy materials are used to create a spinner fairing strong enough to withstand large bird strikes, then the protection capability is improved, but the cost increases significantly
Solution Approach 1:
The shield structure divides the incoming projectile into multiple smaller segments using wire segments or bladed arms arranged in radial patterns. This segmentation transforms a single high-energy impact into multiple lower-energy impacts distributed across different locations, allowing the use of lighter materials while maintaining protection capability
Solution Approach 2:
The shield structure uses relatively simple, replaceable components (wire segments or bladed arms) that can be manufactured at lower cost compared to heavy composite fairings. If damaged, the shield can be replaced without replacing the entire fairing structure, reducing overall system cost
3Reliability
If traditional reinforced spinner fairings are used to withstand large impacts, then the protection capability is improved, but the structural requirements and complexity increase
Solution Approach 1:
The shield structure divides the incoming projectile into multiple smaller segments using wire segments or bladed arms arranged in radial patterns. This segmentation transforms a single high-energy impact into multiple lower-energy impacts distributed across different locations, allowing the use of lighter materials while maintaining protection capability
Solution Approach 2:
The shield structure is nested within the existing spinner fairing structure, positioned between the fairing and the proprotor assembly. This nested configuration allows the shield to provide enhanced protection without requiring complete redesign of the fairing structure itself
4Reliability
If traditional stiff materials are used to absorb strike energy, then the protection capability is improved, but massive loads are transmitted to the spinner spoke and underlying components
Solution Approach 1:
The shield structure divides the incoming projectile into multiple smaller segments using wire segments or bladed arms arranged in radial patterns. This segmentation transforms a single high-energy impact into multiple lower-energy impacts distributed across different locations, allowing the use of lighter materials while maintaining protection capability
Solution Approach 2:
The shield structure converts the harmful concentrated impact force into beneficial distributed lower-energy impacts. By segmenting the projectile, the system transforms a single damaging force into multiple smaller forces that are easier to manage and distribute across the structure
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
This solution enhances bird strike durability, reduces replacement complexity and costs, and decreases aircraft weight by distributing impact forces effectively, allowing smaller components to withstand strikes without damage.
Implementation Method 1
a tiltrotor controls shield with a wire or bladed substructure under a fragile spinner fairing that segments incoming projectiles into smaller, lower-energy elements, dispersing the impact across a wider area
Data Source
AI summary
A tiltrotor controls shield having a blade or wire substructure under a fragile spinner fairing improves bird strike durability. The present disclosure discloses a spinner wind fairing with a shield structure disposed thereunder for providing protection to the proprotor assembly components. The shield structure can segment a projectile, such as a bird, that penetrates the spinner fairing into a series of smaller and lower energy elements spread across a wider area, such that the rotor components can withstand the impact of the smaller elements without damage.