Accession Number : AD0720986

Title :   Event Dial Pack; Project LN309: Effectiveness of Craters as Barriers to Mobility.

Descriptive Note : Final rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Personal Author(s) : Blackmon,Claude A. ; Rula,Adam A.

Report Date : MAR 1971

Pagination or Media Count : 56

Abstract : Event Dial Pack, a 500-ton spherical TNT charge tangent to ground surface, was detonated on 23 July 1970 at the Defence Research Establishment, Suffield (DRES), Ralston, Alberta, Canada. Project LN309: 'Effectiveness of Craters as Barriers to Mobility,' was included in the program of United States sponsored projects pertaining to the event. The objective of Project LN309 was to determine the degree to which a crater and its associated ejecta field constitute a physical barrier to the movement of military vehicles. Four terrain units in the crater and ejecta area were delineated as significant to ground mobility and described in terms of soil strength, soil moisture content, surface configuration, ejecta depth, and areal extent. Performance test data obtained with an M37 3/4-ton truck and an M113A1 armored personnel carrier were used to determine performance degradation in each terrain unit. Vehicle performance in the terrain units identified was predicted using the necessary elements of the Waterways Experiment Station analytical model for predicting off-road vehicle performance, and measured and predicted values for four performance parameters (drawbar pull, go-no go, motion resistance, and speed) were compared. The accuracy of the predictions was acceptable for all performance parameters except that the speeds predicted for the terrain unit (outer lip) that provided the least resistance to motion were higher than the measured values. (Author)

Descriptors :   (*CRATERING, TERRAIN), (*MILITARY TRANSPORTATION, MOBILITY), TNT, SIMULATION, DETONATIONS, MILITARY REQUIREMENTS, DEFORMATION, PERFORMANCE(ENGINEERING), ARMORED VEHICLES, CARGO VEHICLES

Subject Categories : Surface Transportation and Equipment
      Logistics, Military Facilities and Supplies
      Explosions

Distribution Statement : APPROVED FOR PUBLIC RELEASE