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dc.contributor.authorLever, J. H.-
dc.contributor.authorWeale, Jason C.-
dc.creatorCold Regions Research and Engineering Laboratory (U.S.)-
dc.identifier.govdocERDC/CRREL MP-22-8-
dc.descriptionMiscellaneous Paperen_US
dc.description.abstractWe describe here the evolution of lightweight, high-efficiency fuel sleds for Polar over-snow traverses. These sleds consist of flexible bladders strapped to sheets of high molecular weight polyethylene. They cost 1/6th, weigh 1/10th and triple the fuel delivered per towing tractor compared with steel sleds. An eight-tractor fleet has conducted three 3400-km roundtrips to South Pole with each travers delivering 320,000 kg of fuel while emitting <1% the pollutants, consuming 1/2 the fuel and saving $1.6 M compared with aircraft resupply. A two tractor fleet in Greenland recently delivered 83,000 kg of fuel in bladder sleds to Summit with similar benefits. Performance monitoring has revealed that bladder-sled towing resistance is largely governed by sliding friction, which can start high and drop in half over the first 30 min of travel. Frictional heating probably produces a thin water layer that lubricates the sled–snow interface. Consequently, towing resistance depends on the thermal budget of the sled. For example, black fuel bladders increase solar gain and thus decrease sled resistance; data suggest they could double again the fuel delivered per tractor. The outstanding efficiency and low cost of these sleds has transformed fuel delivery to Polar research stations.en_US
dc.description.sponsorshipNational Science Foundation (U.S.). Office of Polar Programs.en_US
dc.format.extent12 pages / 1.28 MB-
dc.publisherEngineer Research and Development Center (U.S.)en_US
dc.relation.ispartofseriesMiscellaneous Paper (Engineer Research and Development Center (U.S.)) ; no. ERDC/CRREL MP-22-8-
dc.relation.isversionofLever, James H., and Jason C. Weale. "High efficiency fuel sleds for polar traverses." Journal of Terramechanics 49, no. 3-4 (2012): 207-213.
dc.rightsApproved for Public Release; Distribution is Unlimited-
dc.sourceThis Digital Resource was created in Microsoft Word and Adobe Acrobat-
dc.subjectOver-snow mobilityen_US
dc.subjectSliding frictionen_US
dc.subjectTransport efficiencyen_US
dc.subjectPolar resupply operationsen_US
dc.titleHigh efficiency fuel sleds for Polar traversesen_US
Appears in Collections:Miscellaneous Paper

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