Forward Fairing Integrated Attachment for Low-Drag Assembly

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Solution Overview

Problem

Existing aircraft fairings are difficult to attach to aircraft structures, requiring multiple parts and fasteners that increase aerodynamic drag and assembly complexity.

Innovation Solution

A forward fairing with an integrally formed protrusion and spigot attachment, allowing for simplified assembly and reduced parts through methods like three-dimensional printing, which reduces drag and assembly time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple separate parts and fasteners are used to attach the fairing, then the attachment is more robust and reliable, but the aerodynamic drag increases and assembly complexity increases

Engineering Contradiction:

Improveattachment reliabilityVSAvoidaerodynamic drag

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The attachment protrusion is integrally formed with the fairing shell as a single piece, eliminating the need for separate fasteners and joints. This merging of components reduces aerodynamic drag by creating a smooth continuous surface while maintaining attachment reliability through the integrated design that attaches to the support structure via the spigot and key slot mechanism.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If multiple separate parts are used for the attachment device, then the attachment is more reliable, but the device complexity and assembly time increase

Engineering Contradiction:

Improveattachment reliabilityVSAvoidattachment device complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The attachment protrusion is integrated into the fairing shell as a single component, reducing the number of parts from multiple separate components to one integral structure. This merging simplifies the attachment device complexity while maintaining reliability through the robust spigot and key slot attachment mechanism.

Inventive Principle:

Principle #5Merging (Combining)

3Strength

If multiple separate parts and fasteners are used, then the attachment can be more securely fastened, but the assembly time and manufacturing complexity increase

Engineering Contradiction:

Improveattachment strengthVSAvoidassembly time

Core Design Contradiction:

StrengthVSLoss of time

Solution Approach 1:

The attachment protrusion is formed integrally with the fairing shell, eliminating the need to assemble multiple fasteners and parts. This reduces assembly time significantly while maintaining attachment strength through the robust integral design that engages with the support structure's key slot.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The invention utilizes additive manufacturing processes to create the integral attachment protrusion, changing the manufacturing parameter from traditional multi-part assembly to single-piece additive fabrication. This approach maintains structural strength while dramatically reducing assembly time and manufacturing complexity.

Inventive Principle:

Principle #35Parameter changes

4Adaptability or versatility

If separate fasteners and joints are used between the protrusion and shell, then the attachment is more adjustable, but the outer surface smoothness decreases and aerodynamic drag increases

Engineering Contradiction:

Improveattachment adjustabilityVSAvoidouter surface smoothness

Core Design Contradiction:

Adaptability or versatilityVSShape

Solution Approach 1:

The attachment protrusion is integrally formed with the fairing shell, eliminating joints and fasteners that would disrupt the outer surface smoothness. This merging creates a continuous aerodynamic surface while the integral design provides sufficient attachment adaptability through the spigot and key slot engagement mechanism.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP4663537A1Forward fairing, aircraft structure, flap support structure and aircraft

Publication Date: 2025.12.17 AIRBUS OPERATIONS GMBH

Figure 1
Figure 2A~2B
Figure 3

AI summary

In order to simplify assembly, the invention proposes a forward fairing 8 for an aircraft is provided. The forward fairing 8 comprises a fairing shell 11 and an attachment device 10. The attachment device 10 comprises a protrusion 14 that is integrally formed with the fairing shell 11 and a spigot 16 that is coupled to the protrusion 14.