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5-3 Compressor Stalls Review SQ
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What are some indications of a compressor stall?
Mild pulsations
Engine vibrations
Loud bangs
Drop in RPMs
Rise in turbine temperature
What causes a compressor stall?
Excessive compressor blade AOA
Other than mechanical malfunctions, what causes most stalls?
Airflow distortions
What determines the angle of attack on a compressor blade?
The angle between the chord line of the rotors and the relative wind.
The relative wind is comprised of the inlet airflow and the compressor RPM
List some flight conditions that could cause a compressor stall.
Abrupt attitude change
Flight through turbulent air
How can FOD affect compressor performance?
Adversely due to compressor blade deformation
What automatically compensates for acceleration and deceleration schedules to help prevent stalls?
Fuel Control Unit (FCU)
How can an exhaust nozzle cause a compressor stall?
(Only applies to variable exhaust nozzle)
It could fail to open, causing a back pressure and reverse flow back through the compressor
What are some of the ways manufacturers decrease the possibility of stalls?
Incorporating Split-spool compressor
Bleed air valves
Variable inlet guide vanes
Variable exhaust nozzle
What should a pilot do to avoid compressor stalls?
Avoid rapid and unnecessary PCL movements.
Maintain at least minimum prescribed airspeeds
What should be done if a stall cannot be controlled?
Execute engine failure procedures
Author
dundane
ID
320951
Card Set
5-3 Compressor Stalls Review SQ
Description
Study Questions
Updated
2016-06-16T14:45:45Z
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