Emergency/Operational Mission logic Flashcards
What type of waypoint logic does an operational mission use?
fly-to. a/c will execute the commands assigned by the upcoming waypoint until it passes that waypoint, then executes the commands assigned by the next waypoint.
Autopilot operational mission memory is capable of accepting up to ____ waypoints.
254
What is the difference between normal and flyover waypoints?
Normal = aircraft may turn prior to next waypoint to make a smoother flight path Flyover = aircraft will attempt to fly directly over the waypoint before turning
Normal waypoint turn logic is based on turn baskets. Turn baskets are based on ______ and ______ (determined by data link type, hold mode type, and aircraft weight)
aircraft ground speed, aircraft roll limitation
Turn baskets have a radius between ____ and ______ feet depending on _______, _______, and ______.
500 and 7000, bank limit, course change, and ground speed
A normal waypoint is considered satisfied when ______. (2 conditions)
- aircraft is within 2 times the turn radius of the waypoint
- the bearing to the waypoint from the nose of the aircraft is > 90degrees either to the left or right
A flyover waypoint is considered satisfied when _______. (2 conditions)
- the bearing to the waypoint is less than 45 degrees
2. the aircraft is inside a 7000 foot radius of the waypoint
After flyover logic is initiated, a heading hold will be started as soon as _______. (2 conditions)
- the bearing to the waypoint is greater than 90 degrees
2. the aircraft is within the distance it would fly in 1 sec at its current TRUE airspeed of the waypoint
How long will the aircraft maintain its heading hold after flyover logic is initiated?
5 sec (ex 120 KTAS = 200 ft/sec. a/c will start hug hold 200ft from waypoint and hold it until 1000ft past, then continue to next waypoint
Emergency mission is defined as a series of up to ___ waypoints.
99
In the event of a RCM reset, only the last ___ waypoints will be saved.
20
Describe emergency mission entry waypoint logic. Is it different than operational mission?
EMSN constantly updates the entry waypoint. Once past 1/2, 3 is entry waypoint. When aircraft regains link, entry wit will be 3 until pilot resets entry waypoint
The emergency mission lost link timer starts _______.
upon reaching the second to last waypoint of EMSN
As the aircraft flys over the next to last waypoint, the ______ is forced ON, which WILL or WILL NOT override pilot specified settings programmed into EMSN.
LOS tx, WILL
RCM will defer the decision to initiate the lost link logic until it has determined whether or not the lost link condition is temporary. This deferment is known as _______.
arming time
What is the arming time for the following link types; LOS, DLOS, KU Cruise mode ON, KU Cruise mode OFF
2, 5, 2, 10
Ground LL logic is used when which 3 conditions are true:
airspeed is less than or equal to 50KIAS
GPS ground speed is less than or equal to 50 knots
Landing gear commanded down by the aircraft
High speed LL logic is used when which 3 conditions are true:
Airspeed exceeds 50KIAS
GPS ground speed is greater than 50 knots
Landing gear commanded up by the aircraft
TRUE or FALSE: When on the ground, aircraft not moving, link is interrupted for 4 sec, upon link back, the engine would be winding down.
False, when on the ground, not moving, engine shut down is delayed for 5 sec.
ILLA should be set at an altitude where the aircraft is ________ and __________.
aircraft is well clear of terrain and obstacles and can safely begin the emergency mission
If the aircraft is above ILLA, when will the aircraft begin the emergency mission?
arming time then direct to entry waypoint
IF the aircraft is below ILLA, it will enter a climb state and begin flying toward __________ in the direction of ______. Altitude command is set to ____________. Airspeed hold and altitude preference mode are turned on, airspeed command is set to __________, and engine power is set to _________. The a/c will fly a ________ hdg until crossing the flyover waypoint and which point it will initiate a turn to enter a ______ hexagonal loiter. The loiter will be flown until _________ (2 conditions)
flyover waypoint the RCM creates 2.5nm, ILLH, ILLA +150ft, climb airspeed, 100%, wind corrected, clockwise,
a/c has reached ILLA or 30min
If no emergency mission was loaded prior to the lost link condition, the loiter will be flown at ________(altitude) until ________ (2 conditions)
ILLA +150ft, aircraft fuel supply is exhausted OR loiter time exceeds the lost link timer (not likely default is 96hrs)
At the expiration of the flight termination timer, the aircraft will ___________ (4 items).
- command engine hot to cold
- lower the landing gear
- set airspeed command to stall +15
- disable altitude hold
If the pilot commands the engine cold prior to lost link, a _______ will still be attempted.
restart
What happens when lost link after arming time +3.5min?
SPMA set to standby
What happens when lost link after arming time +3min 40sec?
SPMA power turned off for 10 sec
What happens when lost link after arming time +3min 50sec?
SPMA power on and performs power-up initialization
What happens when lost link SPMA reset cycle and aircraft is still LL?
IF Ku-band link is not reestablished, every 6min20sec the cycle will be repeated
What might cause an RCM reset?
power fluctuation or other anomaly
In the event of an RCM reset, what info is saved into its nonvolatile memory? (9 items)
- pri/sec up/downlink frees
- ILLH/ILLA
- EMSN info including final 20 wits
- current stall protect setting (on/off)
- a/c weight and config
- IFF transponder setting and M3 squawk
- Mag var and GCS location (for correct antenna pointing)
- Inflight status (flying or not = 50KIAS or RPM >=500)
- LL ground/high speed criteria
What warning might you expect after an RCM reset event and RCM comes back online?
“Flight computer – UAV detects reset”
TRUE or FALSE and why. Setting aircraft presets multiple times per mission should be avoided.
TRUE. Each time presets are loaded, pertinent data is saved into nonvolatile memory. Excessive write cycles will reduce life expectance of RCM and the warning “ DFCS software - diagnostics require post-flight review”
Is the compass rose displayed in True or Mag?
Can be set to either, right click to change.
