Ice Protection Flashcards
WATER DROPLETS IN THE AIR CAN BE SUPERCOOLED TO BELOW FREEZING WITHOUT ACTUALLY TURNING INTO ICE UNLESS THEY ARE DISTURBED IN SOME MANNER
WHEN AIRCRAFT SURFACES DISTURB THESE DROPLETS, THEY IMMEDIATELY TURN TO ICE ON SURFACES
Aircraft Icing
- LOSS OF COMMUNICATION (ANTENNA ICING)
- REDUCTION IN PERFORMANCE OF A TURBINE ENGINE
- DAMAGE TO TURBINE BLADES FROM ICE INGESTION
- REDUCTION OF PISTON ENGINE PERFORMANCE DUE TO CARBURETOR ICING
Effects of Icing
- Visual detection
- Electrical Detection
Types of Ice detection
IS A ________ SYSTEM WHICH USES HOT AIR TO PREVENT THE FORMATION OF ICE ON THE LEADING EDGES OF WINGS AND STABILIZERS
THERMAL PNEUMATIC
Heat is normally supplied by:
- COMBUSTION HEATERS IN RECIPROCATING-ENGINE-POWERED AIRCRAFT
- AND FROM ENGINE BLEED AIR IN TURBINE-POWERED AIRCRAFT
HOT AIR IS DISTRIBUTED FROM THE HEAT SOURCE ALONG THE LEADING EDGE OF THE ITEM BEING ANTI-ICED USING A PERFORATED AIR DUCT CALLED A PICCOLO, OR SPRAY TUBE.
Thermal Anti-Ice
Where does the bleed air come from?
from the Compressor
What are the heating elements used in electric anti icing?
- RESISTIVE FILAMENTS (E.G. PROBES, PITOT TUBES)
- OR TRANSPARENT FILM (E.G. WINDOWS)
USED IN Electric Anti-Icing TO MONITOR AND CONTROL HEATER TEMPERATURE
TEMPERATURE SENSITIVE RESISTORS AND THERMAL SWITCHES
THIS TYPE OF ANTI-ICING IS TYPICALLY LIMITED TO SMALL COMPONENTS DUE TO THE HIGH AMPERAGE DRAW
Electric Anti-Icing
It melts the boundary layer ice and centrifugal force throws ice from the propeller blade.
heating elements embedded in rubberized cloth bonded to prop leading edge
Single or dual element boots installed on each blade and heated simultaneously
Electric Propeller De-ice
What kind of Anti-Icing system used for propeller, leading edge and windscreen.
Older method of anti-icing, DECREASING the freezing point
Chemical
What are the components for Chemical deicing system?
storage tank, pump and filter, delivery lines, and delivery nozzle (distribution)
(MODERN USE Chemical) GLYCOL BASED WEEPING MEMBRANE SYSTEM
INSTALLED ON TITANIUM LEADING EDGES OF WING AND EMPENNAGE
USED PRIMARILY ON RECIPROCATING AIRCRAFT THAT LACK A SUPPLY OF WARM BLEED AIR
SAFE ON AIRCRAFT FINISHES
TKS System
______ is an electromechanical device that allows the transmission of power and electrical signals from a stationary to a rotating structure.
can be found at the back of propeller
It can be used in any electromechanical system that requires rotation while transmitting power or signals.
Slip ring
