Trafficability of Soils: A Summary of Trafficability Studies Through 1955 (open access)

Trafficability of Soils: A Summary of Trafficability Studies Through 1955

Summary of trafficability studies conducted by the Waterways Experiment Station. It includes information about phase I tests related to "Soil Classification and Trafficability Data" as a sub-project of "Trafficability of Soils as Related to the Mobility of Military Vehicles" (published 1947-1955). It also includes initial results of phase II, "Soils Trafficability Predictions."
Date: December 1956
Creator: Waterways Experiment Station (U.S.)
System: The UNT Digital Library
Trafficability Tests with the Marsh Screw Amphibian on Coarse-Grained and Fine-Grained Soils (open access)

Trafficability Tests with the Marsh Screw Amphibian on Coarse-Grained and Fine-Grained Soils

This report provides results of trafficability tests of the Army's Marsh Screw Amphibian vehicle in sand, clay, and silt. Various experiments tested speed, towing, slope climbing, and obstacles in different soils.
Date: January 1964
Creator: Waterways Experiment Station (U.S.)
System: The UNT Digital Library
Trafficability of Soils: Eighteenth Supplement, Development of Revised Mobility Index Formula for Self-Propelled Wheeled Vehicles in Fine-Grained Soils (open access)

Trafficability of Soils: Eighteenth Supplement, Development of Revised Mobility Index Formula for Self-Propelled Wheeled Vehicles in Fine-Grained Soils

The main purposes of this study were to (a) obtain adequate test data to determine experimentally the vehicle cone index (VCI) for 50 passes for vehicles mounted with nonconventional tires and (b) use results of the field tests to develop a revised mobility index (MI) formula for self-propelled wheeled vehicles.
Date: March 1968
Creator: Kennedy, James Garland & Rush, Edgar S.
System: The UNT Digital Library
Trafficability of Soils: Effects of Surface Conditions on Drawbar Pull of a Wheeled Vehicle (open access)

Trafficability of Soils: Effects of Surface Conditions on Drawbar Pull of a Wheeled Vehicle

"A study was conducted to (a) investigate the effects of soil surface conditions on one-pass drawbar pull capabilities of a wheeled vehicle, (b) relate optimum drawbar pull to soil strength as measured by several instruments, (c) develop tentative equations for predicting optimum tractive coefficient, and (d) determine effects of tire characteristics (tread pattern and deflection) on drawbar pull. One hundred and six drawbar pullslip tests were conducted with a 3/4-ton M37 truck at a gross weight of 7240 lb. One tire size (9.00-16, 8-PR), two tread patterns (smooth and nondirectional military), and two tire deflections (15% and 35%) were tested. Surface conditions varied from dry and firm, to wetted with small amounts of water, to flooded. Asphalt surfaces also were tested" (p. xi).
Date: April 1971
Creator: Rush, Edgar S. & Robinson, J. H.
System: The UNT Digital Library