Travel over snow by vehicle in Arctic and mountainous terrain is one of the most difficult problems of our Armed Forces and other public and private agencies. agencies whose services demand over-snow travel find little or no adequate means of transport. Those vehicles which are available, are either economically infeasible in construction and operating costs, or have serious operational limitations. A great amount of research has been done, but as yet, no vehicle has been produced to successfully meet the varied problems of over-snow transportation. The Utah State Agricultural College, and its affiliated organization, the Utah Scientific Research Foundation, in cooperation with other public and private agencies, has sponsored several research projects which have attempted to produce a satisfactory over-snow vehicle.