Details
| Rime Ice
| Clear Ice
|
Appearance
| White, brittle, opaque due to trapped air mainly on leading edges
| Clear, hard, smooth surface
No trapped air.
Spreads over surface.
|
Types of supercooled water droplets
| Small
| Large
|
Rate of freezing
| Rapid
| Slow
|
Temperature range
| 0¡ãC to -30¡ãC
especially -10¡ãC
| 0oC to ¨C10oC (-15oC)
|
Cloud types / precipitation
| Stratiform cloud, tops of Cu cloud
| Rain clouds: Nimbus
|
Ease of removal
| Easy
| Very difficult
|
Hazards
| Disturbs aerofoil shape Increases drag
Increased stall speed Coats aerials and windscreen
| Increased weight
Control freezing
|