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Title: USA CRREL ice chipper
Authors: Frankenstein, Guenther E.
Keywords: Runways
Cold regions
Cold weather conditions
Arctic regions
Antarctic regions
Construction equipment
Ice chipper
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Special report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 73.
Description: Special Report
Introduction: Runway construction on the arctic pack is made difficult and sometimes impossible by the presence of hummocks and pressure ridges. The normal method of site selection is to pick out an area that is far enough away from a pressure ridge and appears to be free of hummocks. In almost all cases, though, hummocks will be present once the snow is removed. These hummocks must be removed before the runway can be put into operation. A hummock is formed when a pressure ridge heals itself through years of weathering; its surface becomes very smooth. By this time most of its brine will have drained out so it will be harder than the surrounding ice. The hummock problem first came to the attention of CRREL when Dr. Assur was at McMurdo, Antarctica, and again when Dr. Assur and the author were on Drifting Station Alpha. They noticed that it was taking longer to remove one hummock than to construct an entire runway. They decided at that time to attempt to design a machine that would be capable of removing these hummocks. The ice chipper, as it was named, was to be an attachment that would be part of a complete runway construction kit. The chipper would have its own power for ice chipping but would depend on a prime mover for mobility. The prime mover would be a construction-type front-end loader equipped with forks that would be used for lifting the attachments. The kit would also include a bucket and blade for snow removal. A crane hook for lifting items such as oil drums, and a rotary snow blower would also be provided. This snow blower would supply its own power for blowing snow and ice chips, but would depend on the prime mover for mobility. To make this kit completely operational and independent it was decided that each piece would be capable of being air-dropped. This required that each piece meet Air Force requirements regarding size and weight for air-dropping. This requirement put a severe limit on gross weight of the prime mover which in turn also put a weight restriction on the ice chipper.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Special Report

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