Jordan, Cammie . 2001. Ground Pattern Performance of the National Guard Black Hawk Helicopter With the 660-Gallon SEI Industries Bambi Helibucket. 0157 2804. Missoula, MT: U.S. Department of Agriculture, Forest Service, National Technology and Development Program. 6 p.

Describes the results of tests to determine the optimal ground pattern coverage of gum-thickened retardant or water dropped from the 660-gallon SEI Industries Bambi helibucket. 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 660-gallon SEI Industries Bambi helibucket flying at drop heights of 73 to 170 feet and airspeeds of 40 to 88 knots. 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 airspeed needed to produce the maximum length of line at the desired coverage when dropping gum-thickened retardant, foam, or water.

Keywords: chemicals, drop guides, WFCS, wildfire

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