Jordan, Cammie . 2000. Ground Pattern Performance of the Erickson Air Crane. 0057 2850. Missoula, MT: U.S. Department of Agriculture, Forest Service, National Technology and Development Program. 8 p.
Describes the results of tests to determine the optimal ground pattern coverage of gum-thickened retardant, foam, and water dropped from the Erickson Air Crane. Graphs with contour lines at 0.5, 1, 2, 3, 4, 6, 8, and 10 gallons per 100 square feet show the drop pattern characteristics for the Erickson Air Crane flying at drop heights of 144 to 262 feet, airspeeds of 35 to 91 knots, and flow rates of 75, 300, and 700 gallons per second. A table shows the coverage of fire-retarding material needed for specific fuel types and fire behavior. Matched tables and graphs allow managers to estimate the flow rate needed to produce the maximum length of line at the desired coverage when dropping gum-thickened retardants, foam, or water.
Keywords: chemicals, drop guides, WFCS, wildfire
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