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Acronyms - Illusions in Flight - ICEFLAGS
This deck covers the key illusions in flight represented by the acronym ICEFLAGS, explaining each type of illusion and its effects on pilots.
I
Inversion - Climb to level flight - fell like tumbling backwards
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Key Terms
Term
Definition
I
Inversion - Climb to level flight - fell like tumbling backwards
C
Coriolis Illusion - Quick head movement during constant rate turn - inner ear - disorient pilot
E
Elevator Illusion - Updraft - extreme vertical acceleration - nose down aircraft
F
False horizon - night lights, stars, boats on water create a false horizon
L
Leans - Quick correction from bank altitude too slowly - feel like bank in opposite direction - inner ear fluid
A
Autokinesis - at night stationary light will be moving
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| Term | Definition | 
|---|---|
I  | Inversion - Climb to level flight - fell like tumbling backwards  | 
C  | Coriolis Illusion - Quick head movement during constant rate turn - inner ear - disorient pilot  | 
E  | Elevator Illusion - Updraft - extreme vertical acceleration - nose down aircraft  | 
F  | False horizon - night lights, stars, boats on water create a false horizon  | 
L  | Leans - Quick correction from bank altitude too slowly - feel like bank in opposite direction - inner ear fluid  | 
A  | Autokinesis - at night stationary light will be moving  | 
G  | Graveyard Spin/Spiral - Lost altitude sensory system makes you feel in level flight - so you pitch back - actually in turn- will tighten turn and losing altitude - keep pulling back and losing altitude  | 
S  | Somoatogravic Illusion- Rapid takeoff - feel like you are climbing, rapid deceleration - fell like you are descending  |