Telescoping Aircraft Door Panel Linkage Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional aircraft doors, whether swinging or sliding, occupy excessive space and weight, limiting aisle space and efficiency in aircraft design.
Innovation Solution
A two-panel door design featuring a first panel hinged to the door frame and a second panel coupled via a rotating arm linkage, reducing the arc traveled by the second panel and thus the door's width, weight, and cross-aisle space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a swinging or hinged door is used, then the door can provide adequate closure area, but it occupies a large amount of cross-aisle space when open
Solution Approach 1:
The door is divided into two panels: a first panel hinged to the door frame and a second panel that slides relative to the first panel. This segmentation allows the door to fold during opening, reducing the arc traveled by the second panel and minimizing cross-aisle space occupation while maintaining adequate closure area.
Solution Approach 2:
The door incorporates a sliding mechanism that allows the second panel to move dynamically relative to the first panel during opening. This dynamic adjustment reduces the fixed arc requirement, enabling the door to occupy less cross-aisle space when open compared to a conventional hinged door.
2Area of stationary object
If a sliding door is used, then the door occupies less cross-aisle space, but it occupies twice the depth space to achieve the same closure area
Solution Approach 1:
By dividing the door into two panels with the second panel sliding on the first, the design achieves a compromise between sliding and hinged doors. The folded configuration during opening reduces depth space occupation compared to a full sliding door, while the hinged connection maintains adequate closure area.
Solution Approach 2:
The second panel nests within or alongside the first panel during the opening sequence, allowing the door to compact into a smaller depth envelope. This nesting action reduces the depth space required compared to a conventional sliding door while maintaining the same closure area.
3Area of moving object
If a conventional door design is used, then the door provides adequate coverage, but it adds unnecessary weight
Solution Approach 1:
Dividing the door into two smaller panels reduces the overall weight compared to a single large panel, while the segmented structure maintains the same coverage area. The reduced weight is beneficial for aircraft applications where weight reduction is critical.
Data Source
Figure 1
Figure 2A~2C
Figure 2D~2E
AI summary
A telescoping aircraft door is disclosed having first and second panels that slide relative to one another to extend and retract as the door closes and opens, respectively. The first panel is hinged to the door frame in a traditional manner, and the second panel is fixed to the door frame by a linkage that limits the arc of the second panel. By selecting the location and length of the linkage, the relative movement of the two panels can be predictably controlled to reduce the depth of the door when closed and the length of the door when opened.