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Aviation Learning Center Document Winter Flying Tips - P-8740-24
Author: FAA Date: 1996
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Engine Operation

During letdown, there may be a problem of keeping the engine warm enough for high power operation, if needed. It may be desirable to use more power than normal, which may require extension of landing gear or flaps to keep the airspeed within limits. Carburetor heat may also be necessary to help vaporize fuel and enrich the mixture.

Blowing Snow and Ice Fog

Blowing snow can be a hazard on landing, and a close check should be maintained throughout the flight as to the weather at destination. If the weather pattern indicates rising winds, then blowing snow may be expected which may necessitate an alternate course of action.

Ice fog is a condition opposite to blowing snow and can be expected in calm conditions about -30 degrees F and below. It is found close to populated areas, since a necessary element in its formation is hydrocarbon nuclei such as found in automobile exhaust gas or the gas from smokestacks.

Both of the conditions described above can form very rapidly and are only a few feet thick (usually no more than 50 feet) and may be associated with clear en route weather. Pilots should always make a careful check of the current and forecast weather, as well as make a preflight plan for alternate courses of action.

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