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Title: Study of the Rammsonde for use in hard snow
Authors: Niedringhaus, Edward Landon.
Keywords: Penetrometers
Snow mechanics
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report;153
Abstract: Summary: The Rammsonde hardness instrument which is presently used by the U. S. Army Cold Regions Research and Engineering Laboratory (USA CRREL) was found to be unsatisfactory for use in processed, age-hardened snow of extreme hardness. During 1963, studies were performed at Houghton, Michigan, and Camp Century, Greenland, to investigate various modifications of the Rammsonde and to improve its suitability for use in hard snow. Studies were also made to determine whether such factors as hammer drop height, hammer weight, and time delay between blows had any effect on the results obtained. It was discovered that the hammer drop height had little apparent effect on the hardness values obtained, but the hammer weight and the time interval between blows had a noticeable effect on the results and must be taken into consideration when performing random hardness tests.
Description: Technical Report
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:CRREL Technical Report

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