L - Engine Exhaust and Reverser Systems (Powerplant)

what are two general types of exhaust systems in use on reciprocating aircraft engines

they are the short stack (open) and the collector system

what are two types of reciprocating engine exhaust systems

short stack and collector

what are the possible hazards of exhaust system failure

can result in carbon monoxide poisoning of the crew and passengers, or partial 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

the exhaust collector system

what type of exhaust system creates a higher exhaust back pressure

the collector system

what is the purpose of a reciprocating engine exhaust system

it is used to remove heat and noxious gases from the engine nacelle

what removes noxious gases and heat

a reciprocating engine exhaust system

what are the three components of an exhaust augmenter system

bell mouth, sleeve and vanes

what happens when lead, zinc, or galvanized marks are made on an exhaust system

the mark is absorbed by the metal when heated and causes a change in the molecular structure that weakens the metal

what type of visual indication can usually be seen in the area of an exhaust leak

exhaust leaks usually leave flat grey or sooty Black carbon streaks on the pipes in the area of the leak

how are ceramic coated exhaust stacks cleaned

degreasing method only

what is the usual cause of muffler and heat exchanger failures

they are usually caused by concentrated areas of thermal stress, or vibration stress

what is the most common form of damage in exhaust systems

cracks that are the result 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

these failures usually occur at welds, flanges, or clamped points in the system

what is a common cause of the waste gate unit malfunctioning in a turbocharger system

the most common cause of the waste gate malfunctioning is carbon buildup, “coke buildup” causing the waste gate valve to stick in the closed position

what factors are affected in the area of the exhaust nozzle of a turbine engine is changed

the size of the exhaust nozzle affects both the engine performance and the exhaust gas temperature

why are thrust reversers not normally used during ground operations

the danger of blowing foreign objects up into the intake stream is too great

what are the probes in a turbine exhaust pipe used for

exhaust system failure can result in carbon monoxide poisoning of crew and passengers

what is the purpose of the waste gate on a turbo charged exhaust

valve controls amount of exhaust gases forced through the turbocharger turbine. when gate is fully closed all gases must pass through the turbine

name two types of thrust reversers

mechanical blockage and aerodynamic blockage type

can a thrust reverser deliver 100 percent of engine power

no

what reference do you use when cleaning and inspecting props for cracks

propeller maintenance manual

what material is used to make exhaust system muffler shrouds

stainless steel

what drawback is 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 altitude

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