Aircraft Systems 2 - Lesson 5 TDF
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16 Terms
Altitude engine
A reciprocating engine whose rated sea level takeoff power can be produced to an established higher altitude.
Anti-ice system
A system that prevents the formation of ice on an aircraft structure.
Augmenter tube
A long, stainless steel tube around the discharge of the exhaust pipes of a reciprocating engine. Exhaust gases flow through the augmenter tube and produce a low pressure that pulls additional cooling air through the engine. Heat may be taken from the augmenter tubes and directed through the leading edges of the wings for thermal anti-icing.
Deicer system
A system that removes ice after it has formed on an aircraft structure.
Ethylene glycol
A form of alcohol used as a coolant for liquid-cooled engines and as an anti-icing agent.
FPD
Freezing point depressant
Frost
Ice crystal deposits formed by sublimation when the temperature and dew point are below freezing.
Glaze ice
Ice that forms when large drops of water strike a surface whose temperature is below freezing. Glaze ice is clear and heavy.
Isopropyl alcohol
A colorless liquid used in the manufacture of acetone and its derivatives and as a solvent and anti-icing agent.
Plenum
An enclosed chamber in which air can be held at a pressure higher than that of the surrounding air.
Rime ice
A rough ice that forms on aircraft flying through visible moisture, such as a cloud, when the temperature is below freezing. Rime ice disturbs the smooth airflow as well as adding weight.
Sea-level engine
A reciprocating engine whose rated takeoff power can be produced only at sea level.
Sublimation
A process in which a solid material changes directly into a vapor without passing through the liquid stage.
Supercooled water
Water in its liquid form at a temperature well below its natural freezing temperature.
Tempered glass
Glass that has been heat treated to increase its strength. Tempered glass is used in birdproof heated windshields for high-speed aircraft.
Thermistor
A special form of electrical resistor whose resistance varies with its temperature.