Sunu4

IcingIcing

IcingIcingDECREASES

LIFT

INCREASES DRAG

DECREASESTHRUST

INCREASESWEIGHT

INCREA

INCREA

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OTHER EFFECTS

Block the pitot and static inlets Obscuration of windscreens Control surface jam Radio interference due to ice build-up on aerials Landing gear deployment / retraction problems

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Intensity of Icing

TRACE - IMPERCEPTIBLE, NO SIGNIFICANTACCUMULATION.

LIGHT - SIGNIFICANT ACCUMULATION FOR A PROLONGED FLIGHT (OVER 1 HOUR).

MODERATE - SIGNIFICANT ACCUMULATION EVEN FOR SHORTER PERIODS OF FLIGHT.

SEVERE - RAPID, DANGEROUS ACCUMULATIONS.

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IcingIcing

Supercooled water Droplets (SLD)

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Types of Icing

Clear/glaze ice, forms when large supercooled droplets impact with an airframe.

Forms from impact with small supercooled droplets.

Combination of clear ice and rime ice and occurs where both types of water droplets are present.

This type of icing is very severe and very similar to clear ice.

CLEAR :

RIME :

MIX :

RAIN ICE:

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Rain Icing

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IcingIcing

Be well educated (anti/de-icing equipment)Be well educated (anti/de-icing equipment) Examine the forecastsExamine the forecasts Clear ice from airframeClear ice from airframe Avoid known areasAvoid known areas Expect icing above Freezing Level Expect icing above Freezing Level

Avoidance of IcingAvoidance of Icing

Sunu4

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