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Experimental and analytical tests of drawbarpull versus track slippage were conducted on four vehicles capable of over-snow operation for the purpose of gaining information to establish design criteria for a 1/2 ton cargo carrier. Conclusions drawn from the test results indicate that the vehicle form is most important in oversnow operation and that the articulated form of vehicle along with other pertinent design features offers the most promising direction for an increase in overall vehicle mobility. (Author).
This report reviews the state of the art of snow traction mechanics and presents the results of a limited field exercise that allowed participants to observe and practice current snow measurement processes and vehicle test procedures. The prime recommendations of the workshop attendees were the use of parameters basic to the laws of physics for the classification of snow strength, and the use of instrumented tracked and wheeled vehicles for snow strength measurements. (Author).
Present military concepts call for highly mobile units capable of rapid dispersal and efficient movement across country where no roads exist, and many current civilian engineering tasks require movement of men and materials long distances over roadless terrain. Oversnow transport is a particular aspect of the general problem of cross-country mobility, but the characteristics of snow-covered regions are such that special techniques and equipment are required for efficient operation. In order to fully understand the action of vehicles in snow and to formulate sound design criteria, it is necessary to develop a theory which permits quantitative analysis of trafficability problems. For practical purposes, vehicle evaluation is at present made from the results of relatively simple field tests which give drawbar pull as their main indicator. The best practical evaluations are made by observing the operational capabilities of vehicles in various types of snow.