Ice and rain control systems Flashcards
(15 cards)
what are the two methods of inflating pneumatic deicer boots
an engine driven vacuum pump and bleed air from a turbine engine compressor
how are deicer boots attached to the leading edges of wing and tail surfaces
bonding, fairing strips and screws or a combination of both
what is the function of the oil separator used in some deicer boots system
in a wet type air pump, it is used to remove entrained oil from output air before it is sent through the boot system
what must be accomplished to a deicer boot prior to a cold patch repair
relieve the installed tension
what normally keeps deicer boots held down in flight
suction is supplied to the boots during flight
what methods are used to supply heat for thermal anti icing systems
turbine compressor hot air, engine exhaust heat exchangers and ram air heated by a combustion heater
how is the temperature maintained in a thermal anti icing system
by mixing heated air with ambient (cold) air
what happens to the thermal anti icing airflow after it has heated a leading edge
the airflow is exhausted to the atmosphere
how can an electrically heated pitot tube with an ammeter installed in the system be checked for operation
it can be verified by noting the current consumption when the heater is turned on
name at least two methods used to remove rain from a windshield
wipers, pneumatic(jet blast), chemical rain repellent and windshield treated with hydrophobic surface seal coating
what powers windshield wiper system
electrical or hydraulic power
what are the two inherent problems associated with windshield wipers when operated in flight
aerodynamic forces reduce blade pressure and failure to achieve fast enough wiper oscillation
how does a pneumatic rain removal system work
the air blast breaks the rain drops into small particles that are then blown away
why is a windshield rain repellent system not operated when the windshield is dry
heavy undiluted repellent will restrict window visibility
what is the purpose of the electronic timer in pneumatic deicer boot system
it controls the operating sequence and time intervals
