Aircraft Fuselage Segment with Offset Curvature Radii
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Solution Overview
Problem
The conventional fuselage shape of aircraft, with radii of curvature centered on the symmetry plane, limits usable cabin volume, particularly in the overhead regions, reducing passenger comfort and economic efficiency for operators.
Innovation Solution
A fuselage segment with four distinct radii of curvature, each with different center points, allowing for increased usable volume in the upper cabin region without expanding the fuselage circumference or weight, achieved by strategically positioning these radii outside the symmetry axis and optimizing their lengths and angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional fuselage shape with radii of curvature centered on the symmetry plane is used, then structural-mechanical integrity is maintained, but usable cabin volume is limited
Solution Approach 1:
The fuselage cross-section is divided into multiple regions, each defined by a separate radius of curvature (first, second, third, and fourth radii). This segmentation allows each region to be optimized independently for cabin space while maintaining overall structural integrity through the coordinated arrangement of these segmented curvature definitions.
Solution Approach 2:
Different regions of the fuselage cross-section are assigned different radii of curvature with different center points. The first and second radii define the upper region with centers offset from the symmetry plane, while the third and fourth radii define the lower region. This local differentiation maximizes cabin volume in specific areas without compromising the overall structural design.
2Area of stationary object
If a conventional fuselage shape with radii centered on the symmetry plane is used, then manufacturing simplicity is maintained, but cabin width and storage capacity are reduced
Solution Approach 1:
The radii of curvature are deliberately positioned with centers that are offset from the symmetry plane of the fuselage. Specifically, the first and second radii have centers that are not collinear with the symmetry plane, creating an asymmetric curvature arrangement that expands cabin width in the upper region while the third and fourth radii maintain structural balance in the lower region.
3Volume of moving object
If the fuselage circumference is increased to provide more cabin volume, then usable space increases, but weight and operational costs increase
Solution Approach 1:
Instead of increasing the fuselage circumference in the horizontal plane, the invention utilizes the vertical dimension by positioning radii centers at different offsets from the symmetry plane. The first and second radii are positioned with centers that create vertical expansion in the upper cabin region, while the third and fourth radii manage the lower region. This dimensional approach increases cabin volume without proportionally increasing the overall fuselage circumference or weight.
Data Source
AI summary
According to an exemplary embodiment of the invention a fuselage segment of an aircraft fuselage is provided, which aircraft fuselage comprises four different radii of curvature, wherein two radii of curvature comprise center points that are not situated on a vertical symmetry axis of the fuselage segment.