Helicopter Fire Retardant Spraying for Building Protection
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Solution Overview
Problem
Traditional methods for combating bushfires, including ground-based water tankers and aerial water drops, often fail to protect buildings from airborne embers and radiant heat, which can ignite roofs and cause destruction.
Innovation Solution
A helicopter-mounted system that sprays a water-based fire retardant gel onto the exterior of buildings in advance of a bushfire, flying in the direction of the fire front to cover all surfaces, mimicking the trajectory of embers and providing protection for up to 6-7 hours without attempting to extinguish the fire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional ground-based water tankers and hand directed hoses are used to fight bushfires, then water can be applied to the fire front, but buildings remain vulnerable to airborne embers and radiant heat
Solution Approach 1:
The helicopter applies fire retardant to buildings in advance before the bushfire reaches them, creating a protective barrier beforehand. This preliminary action allows the building to be protected without requiring direct intervention during the fire's arrival, resolving the contradiction by preparing defenses ahead of time while maintaining operational effectiveness through aerial access.
Solution Approach 2:
The helicopter acts as an intermediary between the fire retardant and the buildings, delivering the protective substance from above without requiring ground-based operations. This intermediary approach enables effective protection of buildings from airborne embers and radiant heat while maintaining ease of operation through aerial mobility and positioning.
2Object-affected harmful factors
If aircraft drop water onto the fire front, then the fire can be suppressed, but buildings still lack protection from flying burning particles
Solution Approach 1:
The fire retardant is applied specifically to the building surfaces that are most vulnerable to flying burning particles, such as roofs and upper walls. This localized application ensures that the protective quality is concentrated exactly where needed, improving reliability of building protection while maintaining operational effectiveness through targeted delivery.
Solution Approach 2:
The protective fire retardant layer is applied to buildings before the bushfire reaches them, creating a pre-established barrier against flying burning particles. This preliminary protective action ensures reliability by ensuring the protection is already in place when the fire arrives, rather than attempting to protect during the fire's direct impact.
3Object-affected harmful factors
If striping with fire retardant gel is used to halt the fire front, then the fire advance can be stopped, but buildings remain open to destruction by airborne embers
Solution Approach 1:
The helicopter serves as an intermediary delivery system that applies fire retardant directly to buildings without requiring complex ground-based striping equipment. This simplifies the overall system complexity by using aerial delivery instead of elaborate ground-based applications, while still providing effective protection from both fire front advance and airborne embers.
Solution Approach 2:
The fire retardant application moves from a two-dimensional ground-based striping approach to a three-dimensional aerial application. By delivering fire retardant from the air, the system can cover building surfaces more effectively and efficiently, reducing the complexity of ground-based equipment while providing comprehensive protection.
4Object-affected harmful factors
If a helicopter sprays fire retardant onto building exteriors in advance, then buildings are protected from embers and radiant heat, but the helicopter must fly in the fire front direction continuously
Solution Approach 1:
The helicopter maintains continuous operation by flying in the fire front direction and applying fire retardant to buildings along its path. This continuous useful action ensures that buildings are protected as the fire approaches, resolving the contradiction by maintaining operational duration through systematic progression along the fire's path rather than requiring repeated trips.
Solution Approach 2:
The helicopter performs preliminary protective action by applying fire retardant to buildings before the fire reaches them, allowing the building to be protected in advance. This preliminary action extends the operational duration effectively, as the helicopter can continue moving with the fire front, applying protection to successive buildings without needing to return or wait.
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
Effectively prevents building destruction by rendering structures incombustible for an extended period, allowing the fire to pass or be extinguished without damage, while the helicopter can make multiple sorties on a single tank load and efficiently cover all surfaces, including hard-to-reach areas like verandas and door alcoves.
Implementation Method 1
spraying the exterior of said asset or building with a water-based fire retardant
Implementation Method 2
water-based fire retardant ejected from a nozzle located above the asset or building
Data Source
AI summary
A method of preserving a building or similar asset (16) from destruction by a bushfire is disclosed. The method includes the step of shortly prior to the arrival of the bushfire at the asset or building (16), spraying the exterior of said asset or building (16) with a water-based fire retardant (17) ejected from a nozzle (10) located above the asset or building (16) and mounted on a helicopter (1) carrying the water-based fire retardant (17).