Wheels and Tracks in Snow. Second Validation Study of the CRREL Shallow Snow Mobility Model
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
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This report presents and analyzes winter mobility data obtained during the winters of 1988 and 1989 at the Keweenaw Research Center, Houghton, Michigan. Traction data 1989 for the HMMWV, HEMTT, SUSV and M60 military vehicles, and the CRREL instrumented vehicle, are presented for hard-packed snow and for undisturbed snow overlaying ice. When these data are compared with an equation for undisturbed snow over soil or packed snow, slight reductions in traction are observed. Resistance data obtained in 1988 and in 1989 are evaluated based on a combined vehicle-snow parameter. An empirical equation based on this parameter and data from all the vehicles, including the CRREL instrumented vehicle using several different width tires, is developed. The resistance data and the empirical resistance equation are compared with the CRREL shallow snow mobility model SSM2.0. The SSM2.0 predicted resistance is within 50 on average. The empirically derived resistance equation is slightly worse. The report recommends further research on vehicle motion resistance in snow.
- Surface Transportation and Equipment