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Title: Pendulum steering for thermal probes in glaciers
Authors: Aamot, H. W. C. (Haldor W. C.)
Keywords: Thermal conductivity
Thermal probes
Pendulum steering
Ice drills
Arctic tools
Thermal factors
Test results
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Description: Special Report
Abstract: Pendulum steering, a new concept of attitude stabilization for thermal probes or coring drills in ice, eliminates instability. The center of support is placed above the center of gravity. A lower and upper hot point produce melt penetration. The ratio of their power levels is the basis for stabilization, which is provided by the automatic control of the heater in the upper hot point. This feature makes possible a single thermal probe design that is suitable for all ice cap temperatures and a wide range of penetration rates (i.e., applied power levels). The simplicity of a thermal probe with pendulum steering suggests availability at modest cost and versatility as a widely applicable tool.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Special Report

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