Mixed ice forms when drops vary in size or when liquid drops are intermingled with snow or ice par ticles. It can form rapidly. Ice particles become imbedded in clear ice, building a very rough ac cumulation sometimes in a mushroom shape on leading edges as …
The purpose of this AC is to provide pilots with a convenient reference guide on the principal factors related to flight in icing conditions and the location of additional information in related publications.
Guidance was added to indicate that generic HOTs are provided for snow mixed with freezing fog below 0 °C (32 °F) in a separate table of the FAA HOT Guidelines. Subparagraph 14a, Referencing Industry Standards, was added to reference SAE AS6285 and AS6286, which may be used when developing a ground icing program.
Airplane and Engine Certification Requirements in Supercooled …
2014年11月4日 · The FAA ultimately determined that the revised icing certification standards should include SLD, mixed phase, and ice crystal icing conditions. This rule is based on ARAC's recommendations to the FAA.
In this course you will learn that water does not always freeze at 320 F. or CIO C. You'll discover which temperatures are mast conducive to clear, rime, and mixed icing, and haw water content and droplet size relates to icing severity.
Mixed ice is a combination of rime and clear ice. Ice can distort the flow of air over the wing, diminish-ing the wing's maximum lift, reducing the angle of attack for maximum lift, adversely affecting airplane handling qualities, and significantly increasing drag.
Task 13C of the Federal Aviation Administration (FAA) Inflight Aircraft Icing Plan, April 1997, addressed mixed-phase conditions (liquid water droplets and ice particles coexisting in a region of a cloud). This report reviews publicly available evidence bearing upon possible safety hazards due to flight in mixed-phase conditions.
Icing Hazards - National Weather Service
Research studies indicate that there is a definite possibility of moderate icing, usually mixed or clear, within 100 to 200 miles ahead of the warm-front surface position. This was particularly noticeable for fast-moving, active, warm fronts.
Example calculations were made to illustrate the effect of mixed icing conditions on the power required to anti-ice an aircraft surface using evaporative and running-wet modes of operation.
Small Airplanes - Federal Aviation Administration
2024年6月10日 · FAA Report DOT/FAA/AR-00/37 (PDF) - Report of the 12A Working Group on Determination of Critical Ice Shapes for the Certification of Aircraft. FAA Report DOT/FAA/AR-01/28 ( PDF ) - Capabilities and Prospects for Improvement in Aircraft Icing Simulation Methods