101-10 Icing Flashcards
1
Q
2 conditions necessary for icing
A
- Visible water
- Temp is less than 0 degrees C (or slightly warmer due to aerodynamic cooling
2
Q
5 effects of icing
A
LIFT & THRUST = decrease
DRAG & WEIGHT = Increase
Stall speed increases
3
Q
Structural ice is determined by …
A
Droplet size
4
Q
Clear ice
A
- from larger drops (cumulus)
- relatively clear
- difficult to remove w/ de-icing equipment
5
Q
Rime Ice
A
- from small drops (stratiform)
-milky or opaque in color
-freezes quickly and traps air
-easiest to remove/protect against
6
Q
Mixed Ice
A
Combo of clear and rime
-difficult to remove
-forms irregular shape
7
Q
Frost conditions
A
Clear, stable air and light winds
Dewpoint is 0 C or lower
Reduces LIFT by 30% and increases DRAG by 40%
8
Q
De icing
A
Physically remove ice by using pneumatic boots
9
Q
Anti-icing
A
Prevent ice from forming using engine heat bled from engine compression
