Week 2: Single and Multi-axis AP Systems Flashcards
On what axis do we roll?
Longitudinal
On what axis do we yaw?
Vertical Axis
On what axis do we pitch?
Lateral axis
This force is generated by engine/propulsion system
Thrust
What is the resistance of air against an aircrafts fwd motion called?
Drag
What is lift?
The force generated by motion of air passing over aircraft wings
This force is due to gravity
Weight
This force is drag caused by a lowered aileron during a turn
Adverse yaw
What is P factor?
Unwanted yaw due to asymmetric thrust by the descending blade in a climb
This attitude gyro gives the aircraft pitch and roll
Vertical gyro
Which gyro gives us yaw?
Directional gyro
What do deviations do?
Produce drive signals to servos to move control surfaces
What does the Turn-Coordinator and Accelerometer give the aircraft?
Position and rate sensing
What is the rate of turn of a Turn Coordinator?
3/s
With an aircraft in level flight what is the output of the two coils in the secondary?
No output from the two coils
When the aircraft rolls in one direction, what is the output result?
Output signal increases in one coil compared to the other
The computer compares the phase of the roll attitude signal with the phase of the excitation signal to determine what?
The direction of bank
The output signals can only be processed accurately by the AP computer ONLY if they are what degrees with the references excitation signal?
0 or 180
What causes an unwanted phase shift that needs to be corrected?
Reactance of the transformer and other circuits
What is the purpose of a Demodulator?
Converts AC error to DC error which is required to drive the DC servo amplifier
What is the most basic mode in the Roll axis?
Wings level
This mode in the roll axis adds a heading error to the wings level mode, what is it called?
Heading hold mode
This mode in the roll axis adds a lateral deviation sensing to the HDG mode circuitry, what is it?
NAV mode
Which instrument combines the functions of the DG and VOR/LOC/ILS?
HSI
How is the CRS selection similar to the HDG bug operation?
Adds a lateral deviation
The Pressure transducer is for what type of stability and the accelerometer is for what type of stability?
PT is long term, accel is short term
The pressure transducer and accelerometer are used by the AP computer for which vertical modes?
ALT Hold, VS Hold, ILS APP,
