Hinged Radome Assembly for Aircraft Maintenance Access
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Solution Overview
Problem
The maintenance of aircraft radomes is labor-intensive and cumbersome due to the large number of fasteners required, which increases maintenance costs and exposes personnel to adverse weather conditions, with a high risk of foreign object damage and inefficient access to internal equipment.
Innovation Solution
A radome assembly with a hinged design that allows for easy access and removal of the radome without dismounting it from the aircraft, using a supporting frame and latches that are hidden from the RF signal path to prevent interference, and a skirt for aerodynamic blending, reducing the need for multiple fasteners and simplifying maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radome is attached using multitude of screws and nutplates, then structural strength and RF signal integrity are maintained, but maintenance complexity and time increase significantly
Solution Approach 1:
The radome assembly is divided into modular components: the radome itself, a supporting frame with attachment fixtures, and a distinct antenna assembly. This segmentation allows the radome to be detached as a unit from the aircraft fuselage without requiring removal of multiple individual fasteners, thereby reducing maintenance time while preserving structural integrity through the frame's attachment fixtures.
2Stability of the object's composition
If radome is securely fastened to aircraft, then structural stability is ensured, but access to internal equipment becomes difficult
Solution Approach 1:
The radome assembly incorporates hinges that enable dynamic movement between a closed position (providing structural stability and aerodynamic integrity during flight) and an open position (providing access to internal equipment). The hinges allow maintenance personnel to open the radome for equipment access while the radome remains attached to the aircraft, eliminating the need for complete removal and reinstallation.
Solution Approach 2:
The antenna assembly is extracted as a separate removable component from the radome interior. This allows the antenna to be independently accessed, removed, and replaced without requiring detachment of the entire radome from the aircraft, thereby providing easy access to internal equipment while maintaining structural stability.
3Strength
If multiple fasteners are used for radome attachment, then structural integrity is maintained, but maintenance labor and costs increase
Solution Approach 1:
Multiple attachment fixtures are merged into an integrated supporting frame structure that attaches to the aircraft fuselage. This consolidated frame provides structural integrity through multiple attachment points while allowing the entire radome assembly to be detached as a single unit, significantly reducing the number of fasteners that must be individually manipulated during maintenance operations.
4Reliability
If radome remains attached during maintenance, then safety and aerodynamic performance are maintained, but access to equipment is limited
Solution Approach 1:
The hinge mechanism enables the radome to dynamically transition between closed and open states while remaining attached to the aircraft. This provides maintenance personnel with wide access to internal equipment during servicing, yet maintains the aerodynamic integrity and safety of having the radome securely attached during normal flight operations.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A radome assembly (20) includes a frame (30) conforming in contour with an aircraft fuselage (14) for being fixedly mounted thereto. A radome (32) having an aerodynamically streamlined elongate contour including a central bulb (34) is spaced from the frame (30) to house an antenna (26) therein, the radome (32) being tuned in configuration to define an unobstructed radio -frequency (RF) window (28) diverging outwardly from atop the frame (30). The radome (32) is pivotally mounted atop the frame (30) by a hinge (36,74,78) hidden inside the frame (30) below the RF window (28) when the radome (32) is stowed closed atop the frame (30) and antenna (26).