DEFENSE ATOMIC SUPPORT AGENCY WASHINGTON DC
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This report on Operation BLOWDOWN describes an Australian field test in which a 50-ton HE charge was detonated over a typical rain forest at the Iron Range Test Site, North Queensland, Australia. U. S. participation included the establishment of a blast line to obtain overpressure and dynamic pressure measurements, as well as the loan of instrumentation and photographic equipment. The experiment also included military trial projects which examined the blast effects in forests on items of military material, field fortifications, supply points, and foot and vehicle movement. This report presents preliminary results in each area of the experiment.