Inflatable Flotation Device With Segmented Extendable Head End
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Solution Overview
Problem
Aircraft evacuation systems with inflatable flotation devices face challenges in accommodating varying terrain angles and distances from the aircraft to the ground surface, leading to undesirable slope angles that can hinder safe passenger evacuation.
Innovation Solution
The inflatable flotation device features an extendable portion with a plurality of segments and an extendable tube, which can be compressed and extended based on the distance from the aircraft to the ground, controlled by a weighted object that adjusts the slope to maintain a safe angle, ensuring a stable ramp for evacuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the inflatable flotation device uses a fixed length design, then the structure is simple and easy to manufacture, but it cannot accommodate varying terrain angles and distances from the aircraft to the ground surface, leading to undesirable slope angles
Solution Approach 1:
The inflatable flotation device is divided into multiple segments (first segment, second segment, third segment) that can be independently inflated or deflated. This segmentation allows the device to adjust its overall length and slope angle by controlling which segments are inflated, enabling adaptation to various terrain conditions while maintaining a manageable structure.
Solution Approach 2:
The flotation device transitions from a static fixed-length structure to a dynamic adjustable-length structure. The segments can be inflated or deflated based on the distance from the aircraft to the ground surface and the desired slope angle, allowing the device to adapt dynamically to different evacuation scenarios.
2Length of moving object
If the inflatable flotation device is extended to cover greater distances, then it can reach the ground surface from higher aircraft positions, but the slope angle may become too steep for safe passenger evacuation
Solution Approach 1:
By dividing the flotation device into multiple segments, the system can extend the overall length to reach the ground from higher aircraft positions while maintaining a gentler slope. Each segment can be inflated to contribute to the total length, distributing the elevation change across multiple sections rather than creating a single steep incline.
Solution Approach 2:
Different segments can be inflated with different pressures or volumes to optimize the local slope angle in each section. This allows the device to achieve both extended length and safe slope angles by adjusting the inflation characteristics of individual segments rather than treating the entire device as a uniform structure.
Data Source
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AI summary
An inflatable flotation device includes a main body (300) having a distal end (302) and a proximal end (304) configured to be positioned nearer to the aircraft than the distal end, the main body configured to inflate to provide an evacuation route. The inflatable flotation device further includes an extendable portion (308) coupled to the proximal end of the main body and having a plurality of segments (400) coupled together. The inflatable flotation device further includes a weighted object (310) coupled to the extendable portion and configured to cause the extendable portion to extend in response to a distance from the proximal end of the main body being equal to or greater than a threshold distance.