Accession Number : AD0678580
Title : A BUOYANCY STABILIZED HOT POINT DRILL FOR GLACIER STUDIES.
Descriptive Note : Technical rept.,
Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
Personal Author(s) : Aamot,Haldor W. C.
Report Date : OCT 1968
Pagination or Media Count : 12
Abstract : Hot point drills are practical tools for penetrating glaciers for ice thickness and temperature measurements and other glaciological studies. Buoyancy stabilization ensures a vertical attitude of the drill and a plumb hole using a heavy hot point and a light upper section which floats in the surrounding melt water. The buoyant force is less than the weight of the drill in air but its rectifying moment about the fulcrum (the tip) is greater than the tilting moment of the drill weight. Two methods to prevent refreezing of the melt water are proposed to permit drilling in cold ice and to assure continued access to the hole. (Author)
Descriptors : (*GLACIERS, DRILLS), (*DRILLS, PENETRATION), BUOYANCY, THICKNESS, STABILIZATION, TEMPERATURE, WATER, FREEZING, MOUNTAINS, FORCE(MECHANICS), MATHEMATICAL ANALYSIS, GRAVITY, ARCTIC REGIONS
Subject Categories : Snow, Ice and Permafrost
Machinery and Tools
Distribution Statement : APPROVED FOR PUBLIC RELEASE