Engine Exhaust and Reverser Systems Flashcards
What are two general types of exhaust systems in use on reciprocating aircraft engines?
Short stack and collector system
What are two types of reciprocating engine exhaust systems?
Short stack and collector system
What are the possible hazards of exhaust system failure?
Carbon monoxide poisoning or complete loss of engine power and an aircraft fire
What type of exhaust system is generally used on low powered non supercharged engines?
Short stack system
What type of exhaust system is used on turbocharged engines?
Collector system
What type of exhaust system creates a high exhaust back pressure?
Collector system
What is the purpose of a reciprocating engine exhaust system?
Remove heat and noxious gases from the engine nacelle
What removes noxious gasses and heat?
A reciprocating engine exhaust system
What are the three components of an exhaust augmenter system?
Bellmouth, Sleeve and Vanes
What happens when lead, zinc, or galvanized marks are made on an exhaust system?
The mark is absorbed into the metal when heated and causes a change in the molecular structure, weakening the metal
What type of visual indication can usually be seen in the area of an exhaust leak?
Flat gray or sooty black carbon streaks
How are ceramic coated exhaust stacks cleaned?
Degreasing method only
What is the usual cause of muffler and heat exchanger failures?
Concentrated areas of thermal stress or vibration stress
What is the most common form of damage in exhaust systems?
Cracks that are results of repeated expansion and contraction
What should be the position of the waste gate when starting an engine?
Fully open
Where are exhaust manifold and stack failures most likely to occur?
Welds, flanges, or clamped points
What is a common cause of the waste gate unit malfunctioning in a turbocharged system?
Carbon buildup causing the waste gate valve to stick in the closed position
What factors are affected if the area of the exhaust nozzle of a turbine engine is changed?
Engine performance and exhaust gas temperature
Why are thrust reversers not normally used during ground operations?
Danger of blowing foreign objects into the intake
What are the probes in a turbine exhaust pipe used for?
To measure exhaust gas temperature (EGT) and pressure
Why do you disassemble and inspect collector type exhaust?
Exhaust system failure can result in carbon monoxide poisoning of crew and passengers
What is the purpose of the waste gate on a turbocharged exhaust?
Controls the amount of exhaust gases forced through the turbocharger turbine
Name two types of thrust reversers.
Mechanical and aerodynamic blockage
Can thrust reversers deliver 100% of engine power?
No
What reference do you use when cleaning and inspecting propellers for cracks?
Propeller maintenance manual
What material is used to make exhaust system muffler shrouds?
Stainless Steel
What drawback in using collector type exhaust systems is more than offset when used on turbocharged engines?
Loss of horsepower due to exhaust system back pressure
Why are turbocharged exhaust system leaks very damaging at high altitudes?
Pressure differential will cause the leak to escape with torchlike intensity
What are the components of a typical turbine exhaust nozzle?
Tail cone, exhaust duct, and support struts
What do you use to mark turbine engine blades?
Layout dye or chalk.
What are two categories of thrust reversers?
Clam shell and cascade.
