Autopilot System

Question 1

What 3 systems interact with the autopilot system to fly the aircraft?

Answer 1

Flight control system
Attitude and air data system
Engine control system

Question 2

The autopilot controls what systems under autonomous flight? (6 systems)

Answer 2

Navigation system
Transponder control system
Airborne datalink control system
An/Das-1 sensor control system
Video data system
Lynx SAR

Question 3

What is SAS and when is it turned on?

Answer 3

automatically upon boot up of the PSO workstation or when/as commanded.

Question 4

What is cruise mode?

Answer 4

cruise mode reduces control sensitivity. roll pitch and yaw gains are scaled with airspeed

Question 5

In cruise mode, scaling limits roll to +/-_____ up to +/-_____ depending on airspeed.

Answer 5

10 up to 40

Question 6

Cruise mode is on when _________.

Answer 6

any of the following conditions exist: any hold mode engaged, airspeed is over 110kias, or stall protect is enabled

Question 7

Cruise mode is automatically turned on as the aircraft accelerates to greater than ___KIAS and will tun off as the aircraft decelerates below ___KIAS.

Answer 7

110, 100

Question 8

What autopilot override function is automatically activated when cruise mode is on?

Answer 8

roll limit override

Question 9

What is meant by ‘launch and recovery mode’?

Answer 9

heading, airspeed, altitude holds and stall protect off

Question 10

WARNING when in cruise mode off, the aircraft may go lost link after the _sec arming time. Once lost link, it defaults to cruise mode on which forces the aiming time to __sec. To prevent this avoid flying cruise mode off when in Ku.

Answer 10

2, 10

Question 11

What is the minimum allowable airspeed command?

Answer 11

a speed that would require a 1g CL of 1.25 for level flight

Question 12

In altitude preference mode, the maximum allowable commanded airspeed is ___KIAS or ___KTAS, whichever is ______.

Answer 12

180KIAS, 240KTAS, slower

Question 13

In airspeed preference mode, the maximum allowable commanded airspeed is ___KIAS or ___KTAS, whichever is ______.

Answer 13

190KIAS, 240KTAS, slower

Question 14

With altitude hold on, airspeed is limited by which safety mode?

Answer 14

Dive priority mode

Question 15

What does the airspeed limit override feature do?

Answer 15

prevents the pilot from commanding an airspeed that would result in a CL lower than 1.25 (1.05 when the auto flap schedule is not active or the gear is down). automatically overrides the commanded airspeed and sets minimum airspeed

Question 16

When is airspeed limit override automatically activated?

Answer 16

when airspeed hold is on

Question 17

In altitude preference mode, the aircraft attempts to maintain airspeed for the commanded altitude by adjusting ______.

Answer 17

the THROTTLE SETTING calculated by the closed loop power function

Question 18

In airspeed preference mode, the aircraft attempts to maintain airspeed for the commanded altitude by adjusting _____.

Answer 18

PITCH, maintaining the commanded throttle setting.

Question 19

Commands for both climbs and descents default to ____fpm

Answer 19

1000

Question 20

Climb rates are selectable between ___ and ____fpm

Answer 20

100-3000fpm

Question 21

Descent rates are selectable between -___ and ____fpm.

Answer 21

-100-2000fpm

Question 22

For aircraft in speed preference mode CL___ or greater, airspeed hold takes precedence over altitude hold. The aircraft will remain in speed preference until CL is ___or less.

Answer 22

1.0, 0.9 0.8,0.7 (903.8)

Question 23

If the aircraft is unable to maintain the set speed and altitude, it will achieve the fastest possible airspeed while maintaining commanded altitude. The aircraft will remain in altitude preference mode until CL is greater than ___. Once the CL decreases to ___, the aircraft will again be in altitude preference mode.

Answer 23

1.0, 0.9

Question 24

What is dive priority mode?

Answer 24

prevents the aircraft from inadvertently exceeding Vne during a dive by setting power to idle and controlling airspeed with pitch.

Question 25

When does dive priority mode automatically engage?

Answer 25

during a descent in altitude preference mode when indicated airspeed comes within 5 KIAS of Vne (190IAS or 240TAS)

Question 26

What is the point in speed priority override?

Answer 26

In altitude pref mode, the aircraft will maintain altitude via pitch command. As altitude takes preference over airspeed, its necessary to have additional protection to prevent a stall.

Question 27

If the indicated airspeed slow to a corresponding CL of ___or ____, whichever is ______, the aircraft enters speed priority override mode.

Answer 27

1.1 or stall +9 kts, greater

Question 28

What 3 things happen when the aircraft enters speed priority override mode?

Answer 28

airspeed-to-pitch is enabled airspeed command is set to the approx. best climb speed, a speed that will achieve a CL of 1.0 The warning "best climb speed override" is sent to the GCS

Question 29

Under what 2 conditions will the aircraft exit speed priority mode?

Answer 29

1. airspeed is not less than 2kias below best climb speed and the aircrafts VSI is > the altitude-to-pitch controller's commanded VSI 2. aircraft is above the commanded altitude and KIAS is above min airspeed command (CL = 1.25)

Question 30

What is the first level of stall protection provided by the autopilot and how does it work?

Answer 30

aileron tip stall override. automatically decambers the ailerons proportionally if AOA increases above +5 units to prevent wingtips from stalling.

Question 31

Aileron tip stall override is activated when _____ or _____. It is only deactivated if ______ and _____.

Answer 31

cruise mode is off or stall protect is on. cruise mode is on AND stall protect is off

Question 32

Aileron tip stall's added deflection the ailerons varies from ___ additional deflection at ___AOA and ___ of aileron deflection at ___AOA.

Answer 32

0 at 5 and 8 at 9

Question 33

TRUE or FALSE. Added aileron deflection from the tip stall override function is added to any pilot commanded aileron deflection?

Answer 33

TRUE

Question 34

Stall protect feature attempts to ______ by ________.

Answer 34

prevent stall by limiting aircraft AOA

Question 35

Stall protect is turned on/off by the pilot, but only takes effect at speeds below __KIAS and automatically turns off at speed greater than __KIAS.

Answer 35

120, 120

Question 36

Stall protect automatically turns on when airspeed is below ___KIAS and ____is engaged

Answer 36

120, autopilot

Question 37

TRUE or FALSE. Stall protect will not turn on, if the pilot has it commanded off and with no autopilot engaged.

Answer 37

TRUE

Question 38

Stall protect prevents stall by deflecting ruddervators ______ when AOA exceeds a threshold value of ___. Stall protect disengages when the AOA is less than ___.

Answer 38

down, 7 , 3

Question 39

Turning on stall protect automatically turns on _________.

Answer 39

cruise mode

Question 40

The roll limit override feature uses CL ____ to maintain a safety margin between the aircrafts _____ and its _____ due to roll angle.

Answer 40

1.25, indicated airspeed and stall speed

Question 41

Roll limit override is automatically activated when (4 conditions)

Answer 41

airspeed or heading hold is on, stall protect is on, or the aircraft is in LOS link mode

Question 42

Stall speed _____ as roll angle ______.

Answer 42

increases, increases

Question 43

What autopilot feature is always enabled and what purpose does it serve?

Answer 43

Sideslip protect. keeps the aircraft from entering an unwanted sideslip condition during turns.

Question 44

The autopilot calculation of aircraft weight is based on ______, minus ________, minus ______.

Answer 44

ramp weight entered by pilot, fuel burned, weight of released stores

Question 45

Why is it important to correctly enter ramp weight in presets?

Answer 45

various flight factors are calculated based on this data such as CL and stall speed

Question 46

What functions are turned off when landing configuration is commanded?

Answer 46

Airspeed/Heading/Altitude hold, preprogram mode and stall protect

Question 47

If a rack switch is required, which 4 items must match between pilot and sensor stations?

Answer 47

Flap lever -3 to +3 Condition lever 0-5 Throttle 10-100 Engine Speed >= 96%