The Danish Deep Drill Progress Report: February-March 1979.
The 'Danish Deep Drill' was developed at the University of Copenhagen. The drill, which will be used to obtain ice cores from the Greenland Ice Sheet, was tested at the U.S. Army Cold Regions Research and Engineering Laboratory. The drill is battery-operated and has a down-hole microproces...
Main Author: | |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
1980
|
Subjects: | |
Online Access: | http://www.dtic.mil/docs/citations/ADA082206 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA082206 |
id |
ftdtic:ADA082206 |
---|---|
record_format |
openpolar |
spelling |
ftdtic:ADA082206 2023-05-15T15:55:49+02:00 The Danish Deep Drill Progress Report: February-March 1979. Rand,John COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH 1980-01 text/html http://www.dtic.mil/docs/citations/ADA082206 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA082206 en eng http://www.dtic.mil/docs/citations/ADA082206 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Snow Ice and Permafrost Machinery and Tools *DRILLS CONTROL MICROPROCESSORS PERFORMANCE(ENGINEERING) COLLECTION FRAGMENTS LAND ICE GREENLAND CORE SAMPLING Danish equipment Chips Text 1980 ftdtic 2016-02-20T17:48:02Z The 'Danish Deep Drill' was developed at the University of Copenhagen. The drill, which will be used to obtain ice cores from the Greenland Ice Sheet, was tested at the U.S. Army Cold Regions Research and Engineering Laboratory. The drill is battery-operated and has a down-hole microprocessor-based control section and a delicately balanced chip removal system. It is a lightweight, electro-mechanical drill designed to obtain a 10.2-cm-diameter core in 2-m lengths. There are potential problems in chip recovery and storage, malfunctions of the computer or batteries, leaks in the pressure chamber, spin-out or rotation of the drill, and the very close tolerances required by the drill design. Tests are recommended that will help eliminate some of these potential problems and determine the drill's overall strengths and weaknesses. The drill is a very complex and delicate instrument that will require constant maintenance, modification and monitoring when in use. (Author) Text Cold Regions Research and Engineering Laboratory Greenland Ice Ice Sheet permafrost Defense Technical Information Center: DTIC Technical Reports database Greenland |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Snow Ice and Permafrost Machinery and Tools *DRILLS CONTROL MICROPROCESSORS PERFORMANCE(ENGINEERING) COLLECTION FRAGMENTS LAND ICE GREENLAND CORE SAMPLING Danish equipment Chips |
spellingShingle |
Snow Ice and Permafrost Machinery and Tools *DRILLS CONTROL MICROPROCESSORS PERFORMANCE(ENGINEERING) COLLECTION FRAGMENTS LAND ICE GREENLAND CORE SAMPLING Danish equipment Chips Rand,John The Danish Deep Drill Progress Report: February-March 1979. |
topic_facet |
Snow Ice and Permafrost Machinery and Tools *DRILLS CONTROL MICROPROCESSORS PERFORMANCE(ENGINEERING) COLLECTION FRAGMENTS LAND ICE GREENLAND CORE SAMPLING Danish equipment Chips |
description |
The 'Danish Deep Drill' was developed at the University of Copenhagen. The drill, which will be used to obtain ice cores from the Greenland Ice Sheet, was tested at the U.S. Army Cold Regions Research and Engineering Laboratory. The drill is battery-operated and has a down-hole microprocessor-based control section and a delicately balanced chip removal system. It is a lightweight, electro-mechanical drill designed to obtain a 10.2-cm-diameter core in 2-m lengths. There are potential problems in chip recovery and storage, malfunctions of the computer or batteries, leaks in the pressure chamber, spin-out or rotation of the drill, and the very close tolerances required by the drill design. Tests are recommended that will help eliminate some of these potential problems and determine the drill's overall strengths and weaknesses. The drill is a very complex and delicate instrument that will require constant maintenance, modification and monitoring when in use. (Author) |
author2 |
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH |
format |
Text |
author |
Rand,John |
author_facet |
Rand,John |
author_sort |
Rand,John |
title |
The Danish Deep Drill Progress Report: February-March 1979. |
title_short |
The Danish Deep Drill Progress Report: February-March 1979. |
title_full |
The Danish Deep Drill Progress Report: February-March 1979. |
title_fullStr |
The Danish Deep Drill Progress Report: February-March 1979. |
title_full_unstemmed |
The Danish Deep Drill Progress Report: February-March 1979. |
title_sort |
danish deep drill progress report: february-march 1979. |
publishDate |
1980 |
url |
http://www.dtic.mil/docs/citations/ADA082206 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA082206 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Cold Regions Research and Engineering Laboratory Greenland Ice Ice Sheet permafrost |
genre_facet |
Cold Regions Research and Engineering Laboratory Greenland Ice Ice Sheet permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA082206 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766391300789108736 |