In view of the landing point and landing forms of water during the helicopter dropping water and extinguishing fire, a mathematical calculation method is proposed, which considers the factors such as helicopter flying height, helicopter sailing speed, wind speed and so on. Through the study of the helicopter's water-dropping algorithm, the position of the water-dropping point and the area of sprinkler fire-extinguishing under various conditions are obtained, which provides an effective place for the helicopter's water-dropping research and theoretical support for the formulation of the technical parameters of the helicopter's water-dropping and fire-extinguishing.
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