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Air tanker drop patterns

Legendre, Dominique and Becker, Ryan and Alméras, Elise and Chassagne, Amélie Air tanker drop patterns. (2014) International Journal of Wildland Fire, 23 (2). 272-280. ISSN 1049-8001

(Document in English)

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Official URL: http://dx.doi.org/10.1071/WF13029


Ground patterns of liquid aerial drops for combating wildfires are considered. Based on a significant number of drop tests performed using different airplanes and helicopters, a simple model for the length, the width and the coverage distribution is presented. At first order both the length and the width of the drop pattern can be described using simple relations despite the significant difference between the conditions of the drop tests considered. These relations include factors that can be manipulated during aircraft and release system design, as well as during aerial firefighting operations. The liquid on the ground follows a Gaussian distribution that makes possible an original prediction of the maximum coverage level on the pattern centreline confirmed by the experiments. The difference between gravity systems and recent pressurised systems is also discussed. We show a clear difference between gravity systems and pressurised systems. The width is larger for pressurised systems, resulting in a smaller coverage for the same condition of drop.

Item Type:Article
Additional Information:Thanks to CSIRO Publishing editor. The definitive version is available at http://www.publish.csiro.au/?paper=WF13029
HAL Id:hal-00961963
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > United States Department of Agriculture - USDA (USA)
Laboratory name:
Deposited On:21 Mar 2014 09:50

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