11.12 Flashcards
What is clear ice and how is it formed
Aka glaze ice
Formed when only some of the droplet freezes
What is rime ice
Small droplets are supercooled
Lighter then clear
What effects does ice have on aircraft
Increase drag and reduce thrust
Increase weight and decrease lift
Where are wing inspection lights
Each side of fuselage foward section
What are visual ice indicators
Posts on the windshield , if ice forms tells the pilot the aircraft is icing over
What angle is a hot rod detector
30 degrees
How can we deice the hot rod detector
It has a heated element within it which is operated by press button in cockpit
What are the number of holes in a pressure operated ice detector
4 holes in leading edge
2 holes in trailing edge
Where is a rotory detector placed and what motor is it
Forward fuselage and has a single phase ac motor
What frequency does a vibrating probe operate
40Khz
How does the sangamo western ice detector work
Icy conditions are detected rather then ice formation
What are the 3 parts of the element ice sensing unit
Moisture detector controller
Moisture sensing head
Thermal switch
What is the sunstrand system
Uses beta particles that release from a strong 90 radiation source
How does primary manual work
Ice detection alters crew and they activate ice protection manually
What are ice detection alerts
Visual and/or audio alerts to draw flight crews attention
How do we thermal pneumatic anti ice
Warm air into piccolo tubes then gets spread over inner surface of aerofoil
What air is used for wing anti ice system
Air bled off from engines
Why are joining sections of ducting hermetically sealed
To prevent the loss of air
When can we use the wai system
In the air and ground tests
What is the wai valve and what does it control
Electrically controlled and Pneumatically actuated
Controls the flow of bleed air from the pneumatic system
What air is used in engine anti ice and how is it controlled
Bleed air is used and is Pneumatically actuated to control flow of air
What force do windshields need to withstand
4lbs
Where are hearing elements in a windshield
Inside of outer glass ply
What is a high heat level
Higher intensity of heat to smaller precise area
