Aircraft instrument systems Flashcards
What error is corrected when an aircraft compass is swung?
Deviation error
What is done to a compass to correct for deviation error?
The compensating magnets in the compass are adjusted to minimize the effect of the outside magnetic fields
Where on an airport is compass rose located?
at a location where there is little traffic and the area is free from magnetic interference caused by electrical power lines or buried pipes
What are the gyroscopic instruments that are connected to the low pressure pneumatic system of an aircraft?
Heading indicator, altitude indicator and turn-and-slip indicator
what are two types of filters used with a pressure system for gyros?
A pump inlet filter and an inline filter
What type of filter is used with vacuum system for gyros?
A central air filter
What my be causing an altitude indicator to properly erect or display?
Gyroscopes are dependent on achieving and maintaining proper rotational speed. Failure to do so may be caused by low vacuum created by the vacuum system or motor failure in an electrically-driven gyroscope
What is the basic purpose of an autopilot?
It frees the human pilot from continuously having to fly the aircraft, and flies with a high degree of precision. it Also couples with various electronic navigational aids
What are the basic subsystems of an automatic flight control system?
Command, error-sensing, correction, and follow-up
what type of device is normally used in the error-sensing subsystem?
Gyro
What are three types of servos that are used in correction subsystem?
Hydraulic, pneumatic and electric
What is the purpose of the follow-up subsystem in an autopilot?
It stops the control movement when the surface has deflected the proper amount for the signal sent by the error sensor
