Icing

1. Composition: Forms on parked aircraft when water vapor turns directly to ice, skipping the liquid stage (deposition).
4. Ice or frost accumulations ___________ drag and rob an aircraft of critical lift.
5. Composition: Layered ice chunks that are produced while ascending and descending in updrafts and downdrafts within a thunderstorm’s core.
7. composition: liquid water drops
8. Composition: A glossy, transparent ice formed by the relatively slow freezing of supercooled liquid water.
9. This type of icing restricts the airflow to the engine.
10. Accumulation Rate: Accumulation rate is such that even short encounters become potentially hazardous.
11. Accumulation Rate: Ice becomes perceptible. Accumulation rate is slightly greater than sublimation rate.
12. Accumulation Rate: Accumulation rate is such that even aircraft with deicing/anti-icing equipment must divert immediately.
13. Composition: Small, translucent pellets of ice.

1. Composition: Supercooled Large Drops (SLD—their temperature is below freezing but still liquid) freeze after contacting an object that is below freezing.
2. FAA Advisory Circular (AC) 00-6B notes that “_____________ that are ¾ inch in diameter and larger can cause significant damage to aircraft and make it difficult to control.”
3. Composition: A rough, milky, opaque ice formed by the instantaneous or very rapid freezing of small supercooled water droplets as they strike the aircraft.
6. Structural ice ________ the air flowing over the wing.
12. Composition: Solid precipitation made up of white or translucent ice crystals that usually do not stick to an aircraft in flight.
14. Accumulation Rate: Accumulation rate may create a problem if flight is prolonged in this environment.
15. Ice accumulates on ________ exposed frontal surface of the airplane.