Chapter 15 - Icing Flashcards
SCWD at temps below 0 degrees cannot freeze because?
No nuclei
Size of the SCWD depends on what, how do they vary
how far below freezing we are, they get smaller as it gets colder
At which temps are the greatest amounts of SCWD
0 to -10
How does icing effect the airframe
weight and drag increase thrust and lift decrease performance instruments damage to airframe
For every degree under 0 degrees how much of a large scwd will freeze
1/80
Which wing is more prone to icing and why
thin and sharp because it cannot displace the air
Which temps do large SWCD form at
0 to -20
Which temps do small SWCD for at
-20 to -40
Ice crystals form at
-40
Hoar frost can occur early in the morning how? and during flight how?
can appear on the aircraft early in the morning after a cold winter night, where water vapour sublimates to ice.
In flight when A/C comes from cold air into warm humid air
Rime ice has which size of SCWD? Where on the A/C does it appear and which type of cloud
Small SCWD
LE - brittle, opaque (has air trapped in it so easy to brush off)
stratus cloud (St)
Clear Ice has which size of SCWD? Where on the A/C does it appear and which type of cloud
Large SCWD
Dangerous because droplet hits a/c and then spreads back over the airframe
Difficult to remove from a/c surfaces
Cu, Cb, Ns
Freezing Rain appears where
Ahead of a warm front from Ns
Mixed Ice is? And from
Clear and Rime (opaque, rough) Mostly from Ns
Engine icing happens how in Carburettors
In humid air - in temps up to +25/30 degrees
