Aircraft Belly-Landing Honeycomb Buffer with Anti-Friction Agent
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Solution Overview
Problem
Existing aircraft protection systems are inadequate for preventing fire and damage during belly landings, especially when fuel cannot be dumped before landing.
Innovation Solution
A honeycomb structure with an anti-friction agent buffer and perforations that release anti-friction agent, such as water or fire-extinguishing foam, to reduce friction and prevent fire during belly landings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a honeycomb structure is filled with anti-friction agent, then fire risk and damage are reduced, but air bubbles block the available space for receiving the anti-friction agent
Solution Approach 1:
The patent inverts the traditional filling approach by providing an air outlet on the first external side (opposite to the conventional wisdom of only having outlets on the bottom). This allows air to escape during filling from the top, enabling complete filling of the honeycomb structure with anti-friction agent without air bubble entrapment, thereby maximizing both protection effectiveness and agent volume.
2Ease of operation
If the perforation is made thinner, then the anti-friction agent can be released more easily by overpressure, but the structural strength of the honeycomb structure is reduced
Solution Approach 1:
The patent applies local quality by making only the perforation area thinner while keeping the rest of the honeycomb structure at its original thickness. This localized thinning creates a weak point that responds to overpressure for easy release of anti-friction agent, while the overall structural strength is maintained by the thicker surrounding honeycomb walls.
3Reliability
If water injection systems are added to cool the fuselage, then fire risk is reduced, but the device complexity increases
Solution Approach 1:
The patent merges the fire protection function with the existing anti-friction agent buffer system. The same honeycomb structure that provides friction reduction during belly landing also serves as a fire suppression system by releasing water or foam through the perforations, eliminating the need for separate cooling systems and reducing overall device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively reduces the risk of fire and damage by creating a protective anti-friction agent film on the aircraft's surface and within the fuel tank, thereby minimizing frictional heat and protecting the rear center tank.
Implementation Method 1
The at least one perforation can be brought to an opened state by overpressure in the anti-friction agent buffer
Implementation Method 2
a board having a low coefficient of friction by means of a drive device is moved into position so that the board mitigates friction when an aircraft carries out a belly landing
Implementation Method 3
a honeycomb structure filled in this way, for example as an external component part of an aircraft fuselage, can be destroyed solely by the force of the impact on the second external side and release the anti-friction agent as a result
Implementation Method 4
Various types of water or foam that are placed in and outside the aircraft are intended to cool the fuselage in the process
Data Source
AI summary
A honeycomb structure including a first external side, a second external side, and an anti-friction agent buffer for receiving an anti-friction agent. An opening to an anti-friction agent inlet and an opening to an air outlet are present on the first external side. This honeycomb structure may be useful in an aircraft as part of a belly-landing system for the aircraft.