Appendix D - An Interim Icing Envelope

Document Number: 2007-01-3311

Date Published: September 2007

Author(s):
Robert S. Mazzawy - Trebor Systems Inc.
J. Walter Strapp - Environment Canada

Abstract:
Early in 2003 the combined Engine Harmonization Working Group/Power Plant Installation Harmonization Working Group (EHWG/PPIHWG) was established to evaluate the effects of super-cooled large droplets (SLD) and mixed phase/glaciated icing conditions on commercial transport power plants. The effort began with an assessment of the extent of engine problems in SLD or mixed-phase/glaciated environments. Icing events from the engine manufacturers' records were compiled into a database which was analyzed and discussed in detail by the combined working group. The combined working group concluded that mixed phase/glaciated conditions were a significant threat to engine operation, with rollback, flameout, stall and core damage symptomatic of some events. These conclusions resulted in a working group effort to define a mixed phase/glaciated icing environment, resulting in the proposed Part 33 Appendix D. This paper documents the process that led to the standards defined in that Appendix.

File Size: 350K
Product Status: In Stock

Included in: V116-2007

See other papers presented at 2007 SAE Aircraft and Engine Icing International Conference, September 2007, Seville, SPAIN, Session: High Ice Crystal Concentrations and Glaciated Conditions

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