Helicopter Fuselage Median Floor for Modular Equipment Access
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Solution Overview
Problem
The structural layout of rotorcraft fuselages faces challenges in accommodating diverse flight missions, handling heavy loads, and ensuring rapid interchangeability of technical floors while maintaining structural integrity and easy access to internal compartments.
Innovation Solution
A fuselage structure with a working median floor that separates the interior volume into two compartments, allowing for modular equipment installation and easy access, and featuring a technical raised floor with interchangeable tiles for specific flight missions, along with a nacelle for freight loading and protection during crashes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional non-working median floor is used to separate compartments, then the interior volume can be divided into habitable and technical rooms, but the structural integrity is compromised and rapid interchangeability of equipment is difficult
Solution Approach 1:
The median floor is segmented into a working structural floor and a non-working technical floor, allowing the structural floor to maintain integrity while the technical floor provides equipment mounting capability. This segmentation enables independent optimization of both structural and equipment interchangeability functions.
Solution Approach 2:
The working median floor serves multiple functions: it provides structural support, divides compartments, and supports equipment mounting. By making the structural floor universal, it can accommodate various equipment configurations while maintaining its primary structural role, thus enabling rapid equipment interchangeability without compromising strength.
2Quantity of substance
If heavy loads are carried in the lower compartment, then the load carrying capacity is improved, but access to internal compartments becomes more difficult
Solution Approach 1:
The patent introduces a vertical dimension to access by providing an opening in the lower compartment that allows access from the exterior. This dimensional approach enables loading and unloading of heavy loads without requiring access through the upper habitable compartment, thus maintaining both load capacity and ease of operation.
3Reliability
If the lower compartment is sealed to protect against crash intrusion, then safety is improved, but access for loading and unloading equipment is restricted
Solution Approach 1:
The patent provides preliminary access solutions by pre-positioning openings in the lower compartment that can be used for loading and unloading equipment before and during normal operation. These openings can be closed during flight to provide protection, thus preparing access mechanisms in advance while maintaining safety during crashes.
Data Source
Figure 1~3
AI summary
The present invention relates to a rotorcraft fuselage structure (1) comprising load-bearing components, including midframes (9a, 9b) supporting an upper floor (12a) and a midfloor (12b). The midfloor (12b) forms an internal partition of the fuselage into two compartments (6, 7): an upper habitable compartment (6) and a lower compartment (7) with an opening (23) to the exterior on the underside of the fuselage. The midfloor (12b) provides a loading platform in the upper compartment (6) onto which a technical floor (27) composed of interchangeable, pre-equipped panels (28) is fixed. The midfloor (12b) also forms an anchoring element for suspending equipment (16, 17) accessible from outside the fuselage through said opening (23).