Abstract
The method presented for mounting strain gages inside earth penetrators gives valid strain-time data during earth entry. In order to maintain axial and circumferential alignment of the strain gages inside the penetrator, a fixture is a necessity. The data obtained from the first test appear valid and indicates a higher degree of bending than had been expected. The data will be used to obtain force-time histories for use with analytical models. The second penetrator will be used to do a repeat of the first test in order to determine the repeatability of the data. Future testing using the same instrumentation will seek to determine the effects of targets of various hardnesses, varying impact velocities, angle of attack and angle of impact.
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