Adjustable Fitting Assembly for Aircraft Fairing Panels
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Solution Overview
Problem
Conventional airplane fairing panel mounting systems require thicker, heavier panels to manage loads across large spans, leading to increased aircraft weight and aerodynamic drag, while allowing limited flexibility and accessibility for secure attachment.
Innovation Solution
An adjustable fitting assembly that allows for the attachment of larger, lighter honeycomb panels to a support frame at medial regions, enabling flexibility and reducing the number of support frames and fasteners, with a panel fitting system that includes a nut plate, locating tool, and flexible cord for secure and accessible installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thicker and/or higher density panels are used to cover large spans, then load-bearing capacity is improved, but aircraft weight increases
Solution Approach 1:
The panel support system is segmented into multiple attachment points distributed across the panel span. The adjustable fitting assembly divides the load path into multiple segments, allowing thinner panels to effectively cover large spans by distributing loads to multiple support locations rather than requiring a single thick panel to span the entire distance.
Solution Approach 2:
The fitting assembly incorporates adjustable positioning mechanisms that allow dynamic adaptation to panel flexing and structural movement. The adjustable slot and positioning features enable the fitting to accommodate dynamic loads and panel deflection, maintaining structural integrity while using lighter, thinner panels that can flex under load.
2Ease of manufacture
If fixed position attachments are used near panel edges, then manufacturing simplicity is improved, but panel flexing capability deteriorates
Solution Approach 1:
The fitting assembly transitions from fixed-position attachment to dynamic adjustment capability. The adjustable slot and positioning mechanisms allow the fitting to move and adapt to panel flexing, maintaining both ease of manufacture through standardized components and adaptability to structural movement and panel deflection.
Solution Approach 2:
The fitting assembly allows adjustment of attachment parameters such as position and orientation. The adjustable slot enables variation in the attachment geometry to accommodate different panel configurations and flexing requirements, maintaining manufacturing simplicity while improving adaptability to structural movement.
3Weight of moving object
If medial region attachment is used, then panel size and weight efficiency are improved, but accessibility for installation deteriorates
Solution Approach 1:
The fitting assembly inverts the traditional attachment approach by allowing installation from the exterior side of the panel rather than requiring access to the interior or support frame. The adjustable fitting design enables fasteners to be accessed and tightened from the panel exterior, making medial region attachment as accessible as edge attachment while maintaining weight efficiency.
4Weight of moving object
If fewer support frames are used, then aircraft weight is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The adjustable fitting assembly incorporates dynamic adjustment capabilities that compensate for variations in panel and frame alignment. The adjustable slot and positioning features allow the fitting to adapt to manufacturing tolerances, reducing the precision requirements while maintaining attachment integrity with fewer support frames.
Solution Approach 2:
The fitting assembly allows adjustment of attachment parameters to compensate for manufacturing variations. By enabling variation in position and orientation, the system reduces sensitivity to manufacturing precision requirements, allowing fewer support frames to be used without compromising alignment accuracy.
Data Source
AI summary
An airplane fairing panel adjustable fitting assembly allows for installation and removal of a fairing panel from outside the fairing. Blind retention features are provided and a pivoting link structure is facilitated to accommodate flexing of an aircraft structure in use. Kits and methods of attaching fairing panels are also disclosed.