A BUOYANCY STABILIZED HOT POINT DRILL FOR GLACIER STUDIES.

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 surroun...

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Bibliographic Details
Main Author: Aamot,Haldor W. C.
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
Format: Text
Language:English
Published: 1968
Subjects:
Snow
Ice and Permafrost
Machinery and Tools
(*GLACIERS
DRILLS)
(*DRILLS
PENETRATION)
BUOYANCY
THICKNESS
STABILIZATION
TEMPERATURE
WATER
FREEZING
MOUNTAINS
FORCE(MECHANICS)
MATHEMATICAL ANALYSIS
GRAVITY
ARCTIC REGIONS
REMOTE AREAS
Arctic
Fulcrum
Tilting
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/AD0678580
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0678580
Description
Summary: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)

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