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Title: Event Mixed Company III, Project LN305 : effectiveness of craters as barriers to mobility
Authors: Green, Charles E.
Keywords: Transportation, Military--Research
Publisher: U.S. Army Engineer Waterways Experiment Station
Series/Report no.: Miscellaneous Paper (U.S. Army Engineer Waterways Experiment Station) ; no. M-73-5
Abstract: Event Mixed Company III, a 500-ton TNT surface charge, was detonated on 13 November 1972 at Grand Junction, Colorado, near Glade Park. Project LN305, "Effectiveness of Craters as Barriers to Mobility," was included in the program of projects sponsored by the United States pertaining to the event. The objective of Project LN305 was to determine: (a) the degree to which a crater and its associated ejecta field constitute a physical barrier to the movement of military vehicles, and (b) if the crater was impassable, the amount of engineering effort required to construct a passable route for the vehicles under consideration. Five terrain units (including the original surface) in the crater area were delineated as significant to ground mobility and were described in terms of soil strength, soil moisture content, surface configuration, and ejecta depth. Go-no go mobility tests were conducted with two tracked vehicles (an M113A1 armored personnel carrier and an M60A1 tank) and one wheeled vehicle (an M561 1-1/4 -ton cargo carrier). The vehicles were operated easily in all the terrain units except terrain unit 4, the crater wall. The crater wall of test lane B was impassable for all the vehicles until the steep slope (66 percent) was graded to a 47 percent slope. The grading required 12 minutes with a TD 20 bulldozer. All vehicles experienced approximately the same degree of difficulty negotiating the crater walls (terrain unit 4).
Description: Miscellaneous Paper
Gov't Doc #: Miscellaneous Paper M-73-5
Rights: Approved for Public Release; Distribution is Unlimited
Appears in Collections:Miscellaneous Paper

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