Trafficability probe testing in sand and clay targets with ground launches and air drops

In August and September 1982, a series of tests was conducted at the Marine Base, Camp Pendleton, California, and at Willcox Playa, Willcox, Arizona, using an air gun and a helicopter to launch instrumented penetrators into sand and clay targets. The purpose of the tests was to collect penetrator deceleration and structural response data, soil resistivity during soil penetration, and other IN SITU soil information. This series of tests was a continuation of a series of tests conducted in September 1981 to assess the feasibility of establishing the type and strength of the soil encountered from the measured data. 130 refs., 90 figs., 14 tabs.