Accession Number : AD0819606

Title :   POLAR TRANSPORTATION - SNOW TRAILS FOR LIGHT WHEELED VEHICLES.

Descriptive Note : Technical rept. Dec 64-Dec 65,

Corporate Author : NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA

Personal Author(s) : Moser, E. H., Jr. ; Sherwood, G. E.

Report Date : AUG 1967

Pagination or Media Count : 20

Abstract : Rapid ground transportation for high-activity polar operations is often required to support outlying facilities during development and to service temporary work centers on snow and ice. Light vehicles with high-flotation tires can usually travel over wind-packed snow at temperatures below 10 F but prepared trails are needed on new, soft drift snow and on other snow surfaces at temperatures near 30 F. At McMurdo Station, Antarctica, 24-hour-old snow trails built with low-ground-pressure snow tractors were traveled by 10,000-pound (GVW) vehicles fitted with high-flotation tires inflated up to 10 psig. Continued traffic improved these trails except when they became drifted over with deep, soft snow. Even then, traffic was resumed within 8 hours after the drift snow was leveled and compacted. In high-activity areas such as that around McMurdo Station, snow trails permit the use of wheeled vehicles to provide rapid ground transportation to outlying areas during emergencies and the construction of high-strength snow roads. In low-activity areas such as Byrd Station, Antarctica, unmaintained equipment-packed trails are of marginal value for wheeled traffic with existing vehicles and maintenance techniques. It is recommended that snow trails be used in polar operations to initially support new and temporary work centers on snow and ice where the requirements and density of traffic demand such support, and that they be used to support outlying areas where speed is required but density and type of traffic do not warrant high-grade snow roads. (Author)

Descriptors :   *TRANSPORTATION, POLAR REGIONS, SNOW, VEHICLES, FLOTATION, TIRES, MAINTENANCE, TRAFFIC, TRACKED VEHICLES, TRACTORS.

Subject Categories : Surface Transportation and Equipment
      Snow, Ice and Permafrost

Distribution Statement : APPROVED FOR PUBLIC RELEASE