Geneva-Drive Tank Closure for Rapid Aircraft Water Release
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Solution Overview
Problem
Existing transport aircraft are not easily convertible for firefighting purposes without significant modification, and existing firefighting aircraft are costly and require complex actuation systems for water release.
Innovation Solution
A Geneva drive mechanism is used to mechanically actuate a closure element for the water tank outlet, allowing easy and quick operation without electrical or hydraulic actuators, enabling reliable sealing and fast water release with minimal effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If electrical or hydraulic actuators are used to actuate the closure element, then the actuation can be automated and powerful, but the device complexity increases and requires additional interfaces in the aircraft
Solution Approach 1:
The patent replaces electrical or hydraulic actuation systems with a purely mechanical Geneva drive mechanism. The closure element is actuated through a mechanical sequence driven by the Geneva drive, eliminating the need for complex electrical/hydraulic interfaces in the aircraft while maintaining automated operation through the mechanical sequencing of the drive mechanism
Solution Approach 2:
The patent extracts and eliminates the electrical and hydraulic actuation components from the system, retaining only the essential mechanical Geneva drive mechanism. This simplification removes the need for additional aircraft interfaces and reduces overall system complexity while preserving the core actuation function
2Ease of operation
If a complex actuation system with multiple interfaces is installed in the aircraft, then the actuation functionality can be enhanced, but the ease of operation decreases and installation becomes more difficult
Solution Approach 1:
The patent combines multiple actuation functions (opening, closing, locking, sealing) into a single integrated Geneva drive mechanism. One mechanical sequence performs all necessary operations on the closure element, simplifying the user interface to a single actuator while maintaining comprehensive functionality
Solution Approach 2:
The Geneva drive mechanism serves multiple functions simultaneously: it opens the closure element, closes it, locks it in position, and ensures sealing. This multi-functional mechanical system replaces what would otherwise require multiple separate actuators and interfaces
3Reliability
If specialized firefighting aircraft are procured, then the firefighting capability is optimized, but the cost and maintenance effort increase significantly
Solution Approach 1:
The patent enables transport aircraft to perform firefighting functions by installing a self-contained water tank and Geneva drive actuation system. The aircraft's existing systems are utilized where possible, while adding only the essential water delivery mechanism, allowing dual-use operation for both transport and firefighting missions
Solution Approach 2:
The patent employs a simplified water tank system with a mechanical Geneva drive actuator that can be quickly installed and removed from transport aircraft. This temporary, easily deployable system provides firefighting capability without requiring permanent modification or specialized aircraft procurement
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 allows transport aircraft to be temporarily converted for firefighting with minimal modification, ensuring rapid water release and restoration of operational readiness, preventing residual water loss, and adapting to various aircraft configurations.
Implementation Method 1
The arrangement is formed in this case with a Geneva drive mechanism
Data Source
AI summary
An arrangement for actuating a closure element that is movable to selectively close and open up an outlet opening of a tank, which can be received or is accommodated in an aircraft, of a device for dropping water for firefighting. The arrangement is formed with a Geneva drive mechanism and makes it possible for the closure element situated in an opened position to be closed to close the outlet opening in a closed position, for the closure element to be locked in the closed position, and for the closure element locked in the closed position to be unlocked for opening the closure element, when the tank is full, to release water. A device with the arrangement for dropping water from an aircraft for firefighting purposes and an aircraft with the device are disclosed.