| Summary: | The model YUH-1D helicopter was tested at temperatures down to -51 F in the Arctic at Eielson AFB, Alaska, during the period of 20 December 1962 through 17 January 1963. This report presents the data that was collected during the test and a discussion and analysis of the low temperature deficiencies that were encountered. The most significant deficiencies that were encountered were excessive engine oil pressure during starts below -20 F and erratic operation of the bleed-air driven fuel boost pump. The helicopter can be expected to operate successfully in an Arctic environment if corrective action is taken as outlined in the recommendations of this report. Research supported by the United States Air Force, Aeronautical Systems Division. AD0422643 (from http://www.dtic.mil). "September 1963." The model YUH-1D helicopter was tested at temperatures down to -51 F in the Arctic at Eielson AFB, Alaska, during the period of 20 December 1962 through 17 January 1963. This report presents the data that was collected during the test and a discussion and analysis of the low temperature deficiencies that were encountered. The most significant deficiencies that were encountered were excessive engine oil pressure during starts below -20 F and erratic operation of the bleed-air driven fuel boost pump. The helicopter can be expected to operate successfully in an Arctic environment if corrective action is taken as outlined in the recommendations of this report. Mode of access: Internet.
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