Crossed Wing-Pylon Fastening Layout for Lower Vertical Bulk
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Solution Overview
Problem
Existing central fastening systems for attaching a wing to a pylon in an aircraft are bulky in the vertical direction, which poses a challenge for reducing the overall dimensions and maintaining structural integrity.
Innovation Solution
A central fastening system with a first and second central fitting, each having parallel-axis clevises, and connection systems with crossed articulation points and rods or clevises, reducing vertical bulk and promoting damage tolerance by isolating articulation points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional central fastening system with multiple rods and articulation points is used, then structural integrity and force transfer are ensured, but the vertical dimensions become bulky
Solution Approach 1:
The patent reorients the articulation points and connection rods from a vertical arrangement to a horizontal arrangement. The first and second articulation points are positioned at different longitudinal locations along the wing structure, with connection rods extending primarily in the longitudinal direction rather than the vertical direction. This dimensional reconfiguration maintains the structural integrity and force transfer capabilities while significantly reducing the vertical bulk of the fastening system.
Solution Approach 2:
The fastening system is divided into distinct functional segments: a first central fitting with a first articulation point, a second central fitting with a second articulation point, and connection rods linking these points. This segmentation allows each component to be optimized independently for its specific function while collectively achieving the overall goal of reduced vertical dimension with maintained structural strength.
2Length of stationary object
If articulation points are positioned close together to reduce vertical bulk, then vertical dimensions are minimized, but damage tolerance may be compromised
Solution Approach 1:
The patent positions articulation points at different longitudinal locations along the wing structure rather than close together vertically. The first articulation point is associated with a first central fitting and the second articulation point with a second central fitting, with connection rods extending in the longitudinal direction. This longitudinal separation maintains damage tolerance by distributing articulation points across different spatial locations while the overall compact design minimizes vertical bulk.
Solution Approach 2:
Different regions of the fastening system are designed with different characteristics: the articulation points are positioned at specific longitudinal locations optimized for damage tolerance, while the connection rods are configured to minimize vertical bulk. Each local region of the structure has properties optimized for its specific functional requirements, achieving both compactness and reliability.
Data Source
AI summary
A central fastening system having a first central fitting as one with a structure of a wing, a second central fitting as one with a structure of a pylon, a first connection system and a second connection system, wherein each connection system is fastened to the first central fitting and to the second central fitting by clevis type connections and wherein the two connection systems cross between the first central fitting and the second central fitting.