Accession Number:

AD0627309

Title:

TERRAMECHANIC EVALUATION OF THE XM-561 IN THAILAND,

Descriptive Note:

Corporate Author:

MILITARY RESEARCH AND DEVELOPMENT CENTER BANGKOK (THAILAND)

Personal Author(s):

Report Date:

1965-10-01

Pagination or Media Count:

192.0

Abstract:

The XM-561 is a six-wheeled, 1 14-T, amphibious truck consisting of a dual-body configuration. The four -wheeled tractor is connected to the two-wheeled carrier by an articulating assembly which permits the forward and rear bodies to pitch and roll independently. The center wheels rotate about a fore and aft axis independent of either body and seek their own ground position. As a result, all six wheels contact the ground and full traction is obtained. Two XM-561s, differing essentially only in tire size, were tested. This terramechanic evaluation was conducted to determine the ability of the XM-561 to operate in the various environments of Thailand and to assess the improvement in mobility resulting from the use of Terra tires. Test results show that the XM-561 is clearly superior to the standard M-37 34-T truck in all aspects of mobility. Equipping the XM-561 with Terra tires results in a substantial increase in soft soil mobility over the standard tires. However, vehicle width becomes excessive for use on trails in Thailand. The XM-561 is satisfactory for operation in Thailand if the tire size is optimized at the largest tire width permissible without requiring the use of a power steering system. Author

Subject Categories:

  • Surface Effect Vehicles and Amphibious Vehicles

Distribution Statement:

APPROVED FOR PUBLIC RELEASE