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what is the Lycoming turbo system critical altitude?
Why is oil temp so important to watch on startup of a turbo system?
Cold congealed oil with adversely affect wastegate control
After landing why idle 3-5 minutes before shutting down?
to allow oil to cool the turbo and prevent coking
When does the differential pressure controller controlling the exaust bypass?
All positions except full throttle
What controls manifold pressure?
What controls turbo above critical altitude (Lycoming) ?
What controls turbo at full throttle on a lycoming system?
What 2 things does a density controller sense?
temperature and pressure
What device helps increase airflow across the engine?
What are the 2 controllers on a Lycoming turbo system?
Density and differential pressure controllers
What is a common way to check exausts?
apply pressure and spray with water then look for bubbling
What are common places to find cracks on exausts?
welds, bends and slip joints
2 common defects in exuasts ?
cracks and bulging
What is used to protect rubber hoses and engine mounts in engine compartments?
What are NA exausts typically made of ? turbo ?
3 types of exaust joints?
Ball, slip, and asbestos gaskets
what adjustments are on the differential pressure controller?
what adjustments are on the density controller?
the preload on the bellows can be adjusted
what are the 2 crucial things to observe when making throttle changes on the turbo lycoming system?
Slow smooth throttle changes and stabilization time
a wastegate is caleed what on a lycoming system?
exaust bypass valve
Changes in atmospheric conditions will affect lycoming system? T or F
Oil viscosity affects exaust bypass operation? T or F
Differential pressure controller senses what 2 things?
Upper deck and manifold pressure
Where is the density controller mounted?
directly on the manifold
How does the density controller work?
A nitrogen filled brass bellows
Upper Deck pressure can be referenced to what 5 things?
fuel flow gauge
cabin pressurization(sonic venturi)
What 3 components are adjustable on a TCM turbo system?
What is used to lubricate wastegate?
what system uses a turbine in the exaust to directly add force to the crank?
turbo compound system
Common things to inspect for on turbo?
broken or nicked blades
leaks in oil or air lines
The altitude where the engine can no longer make rated power?
what is critical altitude on a TCM system?
what is the turbine housing made of?
What is the compressor housing made of?
what seals are used in a turbo?
what kind of bearing is used in a turbo?
plain aluminum bearing
what is often used to remove oil and prevent coking in a turbo?
what is the restrictor called in the wastegate?
3 sourses of heat in a turbo?
compression, friction, hot exaust gasses
device in the intake to cool compressed air with ram air?
a wastegate is spring loaded which way?
What failsafe prevents manifold pressure from building too high in a TCM system?
Pressure relief valve
what drives wastegate toward closed?
purpose of the capillary restrictor on the wastegate inlet?
provides fast opening of the wastegate
2 TYPES of stuperchargers?
internal and external
what are the 4 components of an induction system?
fuel metering device
3 types of carb ice?
alternate air door is held closed by?
magnet on spring
define absolute altitude:
Aircrafts height above ground
Limiting factors of turbosupercharging?
temperature and pressure
MAP is measures in ?
Inches of mercury
APC is calibrated to what?
1" above rated MP
Upper deck pressure is located between?
Turbo and Throttle plate
manifold pressure is loacted between?
throttle plated and valves
The APC uses what 2 pressures?
ambient and UD pressure
the APC does what ?
maintains a constant manifold pressure
Ratio controller limits UDP at?
2.2 times ambient pressure
number one symptom of bootstrapping?
APC and Ratio controller are in series or parellel?
when does ratio controller take over?
above critical altitude
what does the VAPC sense?
what does the VAPC do that the APC does not?
eliminates bootstrapping by having throttle linkage increase or decrease spring pressure on its bellows
the VAPC is not adjustable? T or F
False VAPC restrictor valve seat is adjustable
Rate of change controller on TCM system limits the UDP change to?
6.5 in/hg per second
Ame aircraft maintenance powerplant