Lovellette, Greg . 2004. How to Conduct Drop Tests of Aerial Retardant Delivery Systems. 0457 2813. Missoula, MT: U.S. Department of Agriculture, Forest Service, National Technology and Development Program. 18 p.
Describes in detail the procedures for conducting drop tests to determine the ground pattern coverage of fire retardants, gels, or water dropped from airtankers or helicopters. Basically, a grid of cups is laid out and the airtanker drops the retardant over the grid. Cups with retardant are capped and weighed. Video cameras record the test. An earlier report, Drop Testing Airtankers: A Discussion of the Cup-and-Grid Method (0057-2868-MTDC) discusses the statistical basis of drop tests.
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