摘要: |
In September 2005, the Ice Protection Harmonization Working Group (IPHWG) of the Aviation Rulemaking Advisory Committee proposed a new engineering standard for aircraft operating in supercooled large drop (SLD) conditions. The proposed standard is referred to as Appendix X to Title 14 Code of Federal Regulations Part 25. This report is intended to serve as a reference document for the supporting data and principal analyses relied upon by the IPHWG in the development of Appendix X. Appendix X is primarily based on a very extensive data set collected in several field campaigns by Environment Canada and National Aeronautics and Space Administration Glenn Research Center in the Great Lakes area and off the eastern coast of Canada. Instrumentation used in collecting the data and methods employed in processing the data are described in this report. Environment Canada combined all the data into a single database and carried out the analysis of the data, working closely with and reporting regularly to the IPHWG. Icing climatologies for SLD conditions for North America, Europe, and Asia, which are included in this report, provide an indication of the frequency of occurrence of SLD conditions in these three areas. |