Simulation Variables

SIMULATION VARIABLES

SimVars are "simulation variables" and they are the way that third party APIs and add-ons can get information about the current state of the simulation. In general these variables are used to control aircraft behaviors by permitting you to retrieve data about things like weather conditions, position, or aircraft status, and in many cases they can also be used to modify something within the simulation, in particular aircraft instruments and controls - although they can also have many other purposes within any add-on package.

You can find detailed information about each particular SimVar on the following pages:

We have a Visual Studio project that can be used to generate the SimVar Watcher tool, which can be used to monitor and edit SimVars as the simulation runs. You can find full details here:

SimvarWatcher

There is also a further section dedicated to Event IDs. These are used as a way to interface between different simulation systems, with the user at the top level the various sub-systems within the simulation at the bottom. You can find all these event IDs in the following section:

Event IDs

Finally, there is an additional document for Audio Design that lists the RTPC events and the SimVars they are associated with:

RTPC And Simulation Variables

SimVar Index

Below you can find indexed all the SimVars available, presented this way to facilitate finding the required variable at a glance or through the search system:

F

G

GAMEPLAY_CAMERA_FOCUS
GEAR_ANIMATION_POSITION
GEAR_AUX_POSITION
GEAR_AUX_STEER_ANGLE
GEAR_AUX_STEER_ANGLE_PCT
GEAR_CENTER_POSITION
GEAR_CENTER_STEER_ANGLE
GEAR_CENTER_STEER_ANGLE_PCT
GEAR_DAMAGE_BY_SPEED
GEAR_EMERGENCY_HANDLE_POSITION
GEAR_HANDLE_POSITION
GEAR_HYDRAULIC_PRESSURE
GEAR_IS_ON_GROUND
GEAR_IS_SKIDDING
GEAR_LEFT_POSITION
GEAR_LEFT_STEER_ANGLE
GEAR_LEFT_STEER_ANGLE_PCT
GEAR_POSITION
GEAR_RIGHT_POSITION
GEAR_RIGHT_STEER_ANGLE
GEAR_RIGHT_STEER_ANGLE_PCT
GEAR SKIDDING FACTOR
GEAR_SPEED_EXCEEDED
GEAR_STEER_ANGLE
GEAR_STEER_ANGLE_PCT
GEAR_TAIL_POSITION
GEAR_TOTAL_PCT_EXTENDED
GEAR_WARNING
GEAR_WATER_DEPTH
GENERAL ENG ANTI ICE POSITION
GENERAL ENG COMBUSTION
GENERAL ENG COMBUSTION EX1
GENERAL ENG COMBUSTION SOUND PERCENT
GENERAL ENG DAMAGE PERCENT
GENERAL ENG ELAPSED TIME
GENERAL ENG EXHAUST GAS TEMPERATURE
GENERAL ENG FAILED
GENERAL ENG FIRE DETECTED
GENERAL ENG FUEL PRESSURE
GENERAL ENG FUEL PUMP ON
GENERAL ENG FUEL PUMP SWITCH
GENERAL ENG FUEL PUMP SWITCH EX1
GENERAL ENG FUEL USED SINCE START
GENERAL ENG FUEL VALVE
GENERAL ENG GENERATOR ACTIVE
GENERAL ENG GENERATOR SWITCH
GENERAL ENG HOBBS ELAPSED TIME
GENERAL ENG MASTER ALTERNATOR
GENERAL ENG MAX REACHED RPM
GENERAL ENG MIXTURE LEVER POSITION
GENERAL ENG OIL LEAKED PERCENT
GENERAL ENG OIL PRESSURE
GENERAL ENG OIL TEMPERATURE
GENERAL ENG PCT MAX RPM
GENERAL ENG PROPELLER LEVER POSITION
GENERAL ENG REVERSE THRUST ENGAGED
GENERAL ENG RPM
GENERAL ENG STARTER
GENERAL ENG STARTER ACTIVE
GENERAL ENG THROTTLE LEVER POSITION
GENERAL ENG THROTTLE MANAGED MODE
GLASSCOCKPIT_AUTOMATIC_BRIGHTNESS
GPS_APPROACH_AIRPORT_ID
GPS_APPROACH_APPROACH_ID
GPS_APPROACH_APPROACH_INDEX
GPS_APPROACH_APPROACH_TYPE
GPS_APPROACH_IS_FINAL
GPS_APPROACH_IS_MISSED
GPS_APPROACH_IS_WP_RUNWAY
GPS_APPROACH_MODE
GPS_APPROACH_SEGMENT_TYPE
GPS_APPROACH_TIMEZONE_DEVIATION
GPS_APPROACH_TRANSITION_ID
GPS_APPROACH_TRANSITION_INDEX
GPS_APPROACH_WP_COUNT
GPS_APPROACH_WP_INDEX
GPS_APPROACH_WP_TYPE
GPS CDI SCALING
GPS_COURSE_TO_STEER
GPS_DRIVES_NAV1
GPS_ETA
GPS_ETE
GPS_FLIGHTPLAN_TOTAL_DISTANCE
GPS_FLIGHT_PLAN_WP_COUNT
GPS_FLIGHT_PLAN_WP_INDEX
GPS_GROUND_MAGNETIC_TRACK
GPS_GROUND_SPEED
GPS_GROUND_TRUE_HEADING
GPS GROUND TRUE TRACK
GPS GSI SCALING
GPS HAS GLIDEPATH
GPS_IS_ACTIVE_FLIGHT_PLAN
GPS_IS_ACTIVE_WAY_POINT
GPS_IS_ACTIVE_WP_LOCKED
GPS_IS_APPROACH_ACTIVE
GPS_IS_APPROACH_LOADED
GPS_IS_ARRIVED
GPS_IS_DIRECTTO_FLIGHTPLAN
GPS_MAGVAR
GPS_OBS_ACTIVE
GPS_OBS_VALUE
GPS_OVERRIDDEN
GPS_POSITION_ALT
GPS_POSITION_LAT
GPS_POSITION_LON
GPS_TARGET_ALTITUDE
GPS_TARGET_DISTANCE
GPS_VERTICAL_ANGLE
GPS_VERTICAL_ANGLE_ERROR
GPS_VERTICAL_ERROR
GPS_WP_BEARING
GPS_WP_CROSS_TRK
GPS_WP_DESIRED_TRACK
GPS_WP_DISTANCE
GPS_WP_ETA
GPS_WP_ETE
GPS_WP_NEXT_ALT
GPS_WP_NEXT_ID
GPS_WP_NEXT_LAT
GPS_WP_NEXT_LON
GPS_WP_PREV_ALT
GPS_WP_PREV_ID
GPS_WP_PREV_LAT
GPS_WP_PREV_LON
GPS_WP_PREV_VALID
GPS_WP_TRACK_ANGLE_ERROR
GPS_WP_TRUE_BEARING
GPS_WP_TRUE_REQ_HDG
GPS_WP_VERTICAL_SPEED
GPWS_SYSTEM_ACTIVE
GPWS_WARNING
GRAPPLE HOOK SET
GROUNDPOWERUNIT HOSE DEPLOYED
GROUNDPOWERUNIT HOSE END POSX
GROUNDPOWERUNIT HOSE END POSZ
GROUNDPOWERUNIT HOSE END RELATIVE HEADING
GROUND ALTITUDE
GROUND_VELOCITY
GUN_AMMO
GYRO_DRIFT_ERROR
G_FORCE
G_LIMITER_SETTING

H

HAS_STALL_PROTECTION
HAND ANIM STATE
HEADING_INDICATOR
HELICOPTER_MASTER_THROTTLE_POSITION
HIDE AVATAR IN AIRCRAFT
HOLDBACK_BAR_INSTALLED
HOVER INDUCED VELOCITY
HSI_BEARING
HSI_BEARING_VALID
HSI_CDI_NEEDLE
HSI_CDI_NEEDLE_VALID
HSI_DISTANCE
HSI_GSI_NEEDLE
HSI_GSI_NEEDLE_VALID
HSI_HAS_LOCALIZER
HSI_SPEED
HSI_STATION_IDENT
HSI_TF_FLAGS
HYDRAULIC ACCUMULATOR PRESSURE
HYDRAULIC ACCUMULATOR QUANTITY
HYDRAULIC ACTUATOR ACTIVE
HYDRAULIC ACTUATOR PCT INTEGRITY
HYDRAULIC ACTUATOR PRESSURE
HYDRAULIC PRESSURE
HYDRAULIC PTU ACTIVE
HYDRAULIC PTU DIRECTION
HYDRAULIC PTU PRESSURE
HYDRAULIC PUMP ACTIVE
HYDRAULIC PUMP PRESSURE
HYDRAULIC RESERVOIR PERCENT
HYDRAULIC RESERVOIR PRESSURE
HYDRAULIC RESERVOIR QUANTITY
HYDRAULIC SWITCH
HYDRAULIC SYSTEM INTEGRITY
HYDRAULIC VALVE ACTIVE
HYDRAULIC PRESSURE
HYDRAULIC RESERVOIR PERCENT
HYDRAULIC SWITCH
HYDRAULIC SYSTEM INTEGRITY

I

IDLE ANIMATION ID
INCIDENCE_ALPHA
INCIDENCE_BETA
INDICATED_ALTITUDE
INDICATED_ALTITUDE_CALIBRATED
INDICATED_ALTITUDE_EX1
INDUCTOR_COMPASS_HEADING_REF
INDUCTOR_COMPASS_PERCENT_DEVIATION
INNER_MARKER
INNER_MARKER_LATLONALT
INSTRUMENTS_AVAILABLE
INTERACTIVE POINT BANK
INTERACTIVE POINT HEADING
INTERACTIVE POINT JETWAY LEFT BEND
INTERACTIVE POINT JETWAY LEFT DEPLOYMENT
INTERACTIVE POINT JETWAY RIGHT BEND
INTERACTIVE POINT JETWAY RIGHT DEPLOYMENT
INTERACTIVE POINT JETWAY TOP HORIZONTAL
INTERACTIVE POINT JETWAY TOP VERTICAL
INTERACTIVE POINT GOAL
INTERACTIVE POINT OPEN
INTERACTIVE POINT PITCH
INTERACTIVE POINT POSX
INTERACTIVE POINT POSY
INTERACTIVE POINT POSZ
INTERACTIVE_POINT_TYPE
INTERCOM_MODE
INTERCOM_SYSTEM_ACTIVE
IS_ALTITUDE_FREEZE_ON
IS_ANY_INTERIOR_LIGHT_ON
IS ATTACHED TO SLING
IS_ATTITUDE_FREEZE_ON
IS CAMERA RAY INTERSECT WITH NODE
IS_GEAR_FLOATS
IS_GEAR_RETRACTABLE
IS_GEAR_SKIDS
IS_GEAR_SKIS
IS_GEAR_WHEELS
IS_LATITUDE_LONGITUDE_FREEZE_ON
IS_SLEW_ACTIVE
IS_SLEW_ALLOWED
IS_TAIL_DRAGGER
IS_USER_SIM

J

JETWAY HOOD LEFT BEND
JETWAY HOOD LEFT DEPLOYMENT
JETWAY HOOD RIGHT BEND
JETWAY HOOD RIGHT DEPLOYMENT
JETWAY HOOD TOP HORIZONTAL
JETWAY HOOD TOP VERTICAL
JETWAY MOVING
JETWAY WHEEL ORIENTATION CURRENT
JETWAY WHEEL ORIENTATION TARGET
JETWAY WHEEL SPEED

K

KOHLSMAN_SETTING_HG
KOHLSMAN_SETTING_MB
KOHLSMAN_SETTING_STD

L

LANDING_LIGHT_PBH
LAUNCHBAR_HELD_EXTENDED
LAUNCHBAR_POSITION
LAUNCHBAR_SWITCH
LEAD POLE SET
LEADING_EDGE_FLAPS_LEFT_ANGLE
LEADING_EDGE_FLAPS_LEFT_INDEX
LEADING_EDGE_FLAPS_LEFT_PERCENT
LEADING_EDGE_FLAPS_RIGHT_ANGLE
LEADING_EDGE_FLAPS_RIGHT_INDEX
LEADING_EDGE_FLAPS_RIGHT_PERCENT
LEFT_WHEEL_ROTATION_ANGLE
LEFT_WHEEL_RPM
LIGHT_BACKLIGHT_INTENSITY
LIGHT_BEACON
LIGHT_BEACON_ON
LIGHT_BRAKE_ON
LIGHT_CABIN
LIGHT_CABIN_ON
LIGHT_CABIN_POWER_SETTING
LIGHT_GLARESHIELD
LIGHT_GLARESHIELD_ON
LIGHT_GLARESHIELD_POWER_SETTING
LIGHT_GLARESHIELD_POWER_SETTING
LIGHT_HEADLIGHT_INTENSITY
LIGHT_HEAD_ON
LIGHT_LANDING
LIGHT_LANDING_ON
LIGHT_LOGO
LIGHT_LOGO_ON
LIGHT_NAV
LIGHT_NAV_ON
LIGHT_ON_STATES
LIGHT_PANEL
LIGHT_PANEL_ON
LIGHT_PANEL_POWER_SETTING
LIGHT_PEDESTRAL
LIGHT_PEDESTRAL_ON
LIGHT_PEDESTRAL_POWER_SETTING
LIGHT_POTENTIOMETER
LIGHT_RECOGNITION
LIGHT_RECOGNITION_ON
LIGHT_STATES
LIGHT_STROBE
LIGHT_STROBE_ON
LIGHT_TAXI
LIGHT_TAXI_ON
LIGHT_WING
LIGHT_WING_ON
LINE CONNECTION ON
LINE BREAKER PULLED
LINEAR_CL_ALPHA
LIQUID DROPPING DOOR FLOW
LIQUID DROPPING DOOR FLOW VOLUME
LIQUID DROPPING DOOR OPEN TARGET
LIQUID DROPPING DOOR OPEN VALUE
LIQUID DROPPING SCOOP FLOW
LIQUID DROPPING SCOOP FLOW VOLUME
LIQUID DROPPING SCOOP OPEN TARGET
LIQUID DROPPING SCOOP OPEN VALUE
LIQUID DROPPING TANK CAPACITY
LIQUID DROPPING TANK CAPACITY VOLUME
LIQUID DROPPING TANK CURRENT VOLUME
LIQUID DROPPING TANK TOTAL CAPACITY
LIQUID DROPPING TANK TOTAL CAPACITY VOLUME
LIQUID DROPPING TANK TOTAL CURRENT VOLUME
LIQUID DROPPING TANK TOTAL WEIGHT
LIQUID DROPPING TANK WEIGHT
LIQUID DROPPING TOTAL DROPPED FLOW
LIQUID DROPPING TOTAL DROPPED FLOW VOLUME
LIQUID DROPPING TOTAL SCOOPED FLOW
LIQUID DROPPING TOTAL SCOOPED FLOW VOLUME

M

MACH_MAX_OPERATE
MAGNETIC_COMPASS
MAGVAR
MANUAL_FUEL_PUMP_HANDLE
MANUAL_INSTRUMENT_LIGHTS
MARKER_AVAILABLE
MARKER_BEACON_SENSITIVITY_HIGH
MARKER_BEACON_STATE
MARKER_BEACON_TEST_MUTE
MARKER_SOUND
MARSHALLER AIRCRAFT DIRECTION PARKINGSPACE
MARSHALLER AIRCRAFT DISTANCE
MARSHALLER AIRCRAFT DISTANCE DIRECTION X PARKINGSPACE
MARSHALLER AIRCRAFT DISTANCE DIRECTION Z PARKINGSPACE
MARSHALLER AIRCRAFT ENGINE SHUTDOWN
MARSHALLER AIRCRAFT HEADING PARKINGSPACE
MARSHALLER AIRCRAFT PROJECTION POINT PARKINGSPACE
MARSHALLER AIRCRAFT VELOCITY
MASTER IGNITION SWITCH
MAX EGT
MAX G FORCE
MAX GROSS WEIGHT
MAX LANDING WEIGHT
MAX OIL TEMPERATURE
MAX RATED ENGINE RPM
MAX TAKEOFF WEIGHT
MAX ZERO FUEL WEIGHT
MIDDLE_MARKER
MIDDLE_MARKER_LATLONALT
MIN_DRAG_VELOCITY
MIN_G_FORCE
MISSION_SCORE

N

NAV_ACTIVE_FREQUENCY
NAV_AVAILABLE
NAV_BACK_COURSE_FLAGS
NAV_CDI
NAV_CLOSE_DME
NAV_CLOSE_FREQUENCY
NAV_CLOSE_IDENT
NAV_CLOSE_LOCALIZER
NAV_CLOSE_NAME
NAV_CODES
NAV_DME
NAV_DMESPEED
NAV_DME_LATLONALT
NAV_FREQUENCY
NAV_GLIDE_SLOPE
NAV_GLIDE_SLOPE_ERROR
NAV_GLIDE_SLOPE_LENGTH
NAV_GSI
NAV_GS_FLAG
NAV_GS_LATLONALT
NAV_GS_LLAF64
NAV_HAS_CLOSE_DM
NAV_HAS_CLOSE_LOCALIZER
NAV_HAS_DME
NAV_HAS_GLIDE_SLOPE
NAV_HAS_LOCALIZER
NAV_HAS_NAV
NAV_HAS_TACAN
NAV_IDENT
NAV_LOCALIZER
NAV_LOC_AIRPORT_IDENT
NAV_LOC_RUNWAY_DESIGNATOR
NAV_LOC_RUNWAY_NUMBER
NAV_MAGVAR
NAV_NAME
NAV_OBS
NAV_RADIAL
NAV_RADIAL_ERROR
NAV_RAW_GLIDE_SLOPE
NAV_RELATIVE_BEARING_TO_STATION
NAV_SIGNAL
NAV_SOUND
NAV_STANDBY_FREQUENCY
NAV_TOFROM
NAV_VOLUME
NAV_VOR_DISTANCE
NAV_VOR_LATLONALT
NAV_VOR_LLAF64
NEW_ELECTRICAL_SYSTEM
NEW_FUEL_SYSTEM
NOSEWHEEL_LOCK_ON
NOSEWHEEL_MAX_STEERING_ANGLE
NUMBER_OF_CATAPULTS
NUMBER OF ENGINES
NUMBER OF MAIN ROTORS
NUM FUEL SELECTORS
NUM SLING CABLES

O

OIL AMOUNT
ON_ANY_RUNWAY
ORNITHOPTER CONTROL LEVERS X
ORNITHOPTER CONTROL LEVERS Y
ORNITHOPTER DIVE MODE ENABLED
ORNITHOPTER GLIDE MODE ENABLED
ORNITHOPTER WINGS BRAKE ENABLED
ORNITHOPTER WINGS BRAKE ACTIVE
ORNITHOPTER WING HORIZONTAL TILT
ORNITHOPTER WING PITCH
ORNITHOPTER WING VERTICAL TILT
ORNITHOPTER WINGS BLUR
ORNITHOPTER WINGS CLUTCH STATE
ORNITHOPTER WINGS FOLDING OPERATION ID
ORNITHOPTER WORLD LIFT
OUTER_MARKER
OUTER_MARKER_LATLONALT
OVERSPEED_WARNING

P

PANEL_ANTI_ICE_SWITCH
PANEL AUTO FEATHER SWITCH
PARACHUTE OPEN
PARTIAL_PANEL_ADF
PARTIAL_PANEL_AIRSPEED
PARTIAL_PANEL_ALTIMETER
PARTIAL_PANEL_ATTITUDE
PARTIAL_PANEL_AVIONICS
PARTIAL_PANEL_COMM
PARTIAL_PANEL_COMPASS
PARTIAL_PANEL_ELECTRICAL
PARTIAL_PANEL_ENGINE
PARTIAL_PANEL_FUEL_INDICATOR
PARTIAL_PANEL_HEADING
PARTIAL_PANEL_NAV
PARTIAL_PANEL_PITOT
PARTIAL_PANEL_TRANSPONDER
PARTIAL_PANEL_TURN_COORDINATOR
PARTIAL_PANEL_VACUUM
PARTIAL_PANEL_VERTICAL_VELOCITY
PAYLOAD_STATION_COUNT
PAYLOAD_STATION_NAME
PAYLOAD_STATION_NUM_SIMOBJECTS
PAYLOAD_STATION_OBJECT
PAYLOAD_STATION_WEIGHT
PILOT_TRANSMITTER_TYPE
PILOT_TRANSMITTING
PITOT_HEAT
PITOT_HEAT_SWITCH
PITOT_ICE_PCT
PLANE_ALTITUDE
PLANE_ALT_ABOVE_GROUND
PLANE_ALT_ABOVE_GROUND_MINUS_CG
PLANE_BANK_DEGREES
PLANE_HEADING_DEGREES_GYRO
PLANE_HEADING_DEGREES_MAGNETIC
PLANE_HEADING_DEGREES_TRUE
PLANE_IN_PARKING_STATE
PLANE_LATITUDE
PLANE_LONGITUDE
PLANE_PITCH_DEGREES
PLANE_TOUCHDOWN_BANK_DEGREES
PLANE_TOUCHDOWN_HEADING_DEGREES_MAGNETIC
PLANE_TOUCHDOWN_HEADING_DEGREES_TRUE
PLANE_TOUCHDOWN_LATITUDE
PLANE_TOUCHDOWN_LONGITUDE
PLANE_TOUCHDOWN_NORMAL_VELOCITY
PLANE_TOUCHDOWN_PITCH_DEGREES
PNEUMATICS AIRCRAFT PRESSURE
PNEUMATICS APU BLEED AIR
PNEUMATICS AREAS MAX TEMPERATURE
PNEUMATICS AREAS MIN TEMPERATURE
PNEUMATICS AREA TARGET TEMPERATURE
PNEUMATICS AREA TARGET TEMPERATURE PCT
PNEUMATICS AREA TEMPERATURE
PNEUMATICS CABIN ALTITUDE
PNEUMATICS CABIN ALTITUDE RATE
PNEUMATICS DIFFERENTIAL PRESSURE
PNEUMATICS DUCT PRESSURE
PNEUMATICS DUCT TEMPERATURE
PNEUMATICS ENGINE BLEED AIR
PNEUMATICS ENGINE BLEED AIR PRESSURE
PNEUMATICS ENGINE BLEED AIR TEMPERATURE
PNEUMATICS JUNCTION LINE OPENING STATUS
PNEUMATICS PACK FLOW
PNEUMATICS PACK FLOW AUTO
PNEUMATICS PACK FLOW MODE
PNEUMATICS PACK FLOW MODE VALUE
PNEUMATICS PACK FLOW MODE VALUE HIGH
PNEUMATICS PACK FLOW MODE VALUE LOW
PNEUMATICS PACK FLOW MODE VALUE NORM
PNEUMATICS PACK STATUS
PNEUMATICS PACK SWITCH
PNEUMATICS PACK TEMPERATURE
PNEUMATICS TARGET CABIN ALTITUDE
PNEUMATICS VALVE MODE
PNEUMATICS VALVE STATUS
PNEUMATICS VALVE TARGET STATUS
PNEUMATICS VALVE SWITCH
PRESSURE_ALTITUDE
PRESSURIZATION_CABIN_ALTITUDE
PRESSURIZATION_CABIN_ALTITUDE_GOAL
PRESSURIZATION_CABIN_ALTITUDE_RATE
PRESSURIZATION_DUMP_SWITCH
PRESSURIZATION_PRESSURE_DIFFERENTIAL
PROP AUTO CRUISE ACTIVE
PROP AUTO FEATHER ARMED
PROP BETA
PROP BETA FORCED ACTIVE
PROP BETA FORCED POSITION
PROP BETA MAX
PROP BETA MIN
PROP BETA MIN REVERSE
PROP DEICE SWITCH
PROP FEATHERED
PROP FEATHERING INHIBIT
PROP FEATHER SWITCH
PROP MAX RPM PERCENT
PROP ROTATION ANGLE
PROP RPM
PROP SYNC ACTIVE
PROP SYNC DELTA LEVER
PROP THRUST
PROPELLER_ADVANCED_SELECTION
PUSHBACK ANGLE
PUSHBACK ATTACHED
PUSHBACK AVAILABLE
PUSHBACK CONTACTX
PUSHBACK CONTACTY
PUSHBACK CONTACTZ
PUSHBACK STATE
PUSHBACK WAIT

R

RADIOS_AVAILABLE
RADIO_HEIGHT
RAD_INS_SWITCH
REALISM
REALISM_CRASH_DETECTION
REALISM_CRASH_WITH_OTHERS
RECIP CARBURETOR TEMPERATURE
RECIP CARBURETOR TEMPERATURE
RECIP ENG ALTERNATE AIR POSITION
RECIP ENG ANTIDETONATION FLOW RATE
RECIP ENG ANTIDETONATION TANK MAX QUANTITY
RECIP ENG ANTIDETONATION TANK QUANTITY
RECIP ENG ANTIDETONATION TANK VALVE
RECIP ENG BRAKE POWER
RECIP ENG BRAKE POWER PCT
RECIP_ENG_COOLANT_RESERVOIR_PERCENT
RECIP_ENG_COWL_FLAP_POSITION
RECIP ENG CYLINDER HEAD TEMPERATURE
RECIP_ENG_CYLINDER_HEALTH
RECIP_ENG_DETONATING
RECIP_ENG_EMERGENCY_BOOST_ACTIVE
RECIP_ENG_EMERGENCY_BOOST_ELAPSED_TIME
RECIP_ENG_ENGINE_MASTER_SWITCH
RECIP_ENG_FUEL_AVAILABLE
RECIP_ENG_FUEL_FLOW
RECIP_ENG_FUEL_NUMBER_TANKS_USED
RECIP_ENG_FUEL_TANKS_USED
RECIP_ENG_FUEL_TANK_SELECTOR
RECIP_ENG_GLOW_PLUG_ACTIVE
RECIP_ENG_LEFT_MAGNETO
RECIP_ENG_MANIFOLD_PRESSURE
RECIP_ENG_NITROUS_TANK_MAX_QUANTITY
RECIP_ENG_NITROUS_TANK_QUANTITY
RECIP_ENG_NITROUS_TANK_VALVE
RECIP_ENG_NUM_CYLINDERS
RECIP_ENG_NUM_CYLINDERS_FAILED
RECIP_ENG_PRIMER
RECIP_ENG_RADIATOR_TEMPERATURE
RECIP_ENG_RIGHT_MAGNETO
RECIP_ENG_STARTER_TORQUE
RECIP_ENG_TURBINE_INLET_TEMPERATURE
RECIP_ENG_TURBOCHARGER_FAILED
RECIP_ENG_WASTEGATE_POSITION
RECIP_MIXTURE_RATIO
REFERENCE SPEED MAX IAS
REFERENCE SPEED MAX IAS GEAR DOWN
REJECTED_TAKEOFF_BRAKES_ACTIVE
RELATIVE_WIND_VELOCITY_BODY_X
RELATIVE_WIND_VELOCITY_BODY_Y
ROTATION_ACCELERATION_BODY_Z

RETRACT_FLOAT_SWITCH
RETRACT_LEFT_FLOAT_EXTENDED
RETRACT_RIGHT_FLOAT_EXTENDED
RIGHT_WHEEL_ROTATION_ANGLE
RIGHT_WHEEL_RPM
ROCKET_AMMO
ROTATION_ACCELERATION_BODY_X
ROTATION_ACCELERATION_BODY_Y
ROTATION_ACCELERATION_BODY_Z
ROTATION_VELOCITY_BODY_X
ROTATION_VELOCITY_BODY_Y
ROTATION_VELOCITY_BODY_Z
ROTOR BRAKE ACTIVE
ROTOR BRAKE HANDLE POS
ROTOR CHIP DETECTED
ROTOR CLUTCH ACTIVE
ROTOR CLUTCH SWITCH POS
ROTOR COLLECTIVE BLADE PITCH PCT
ROTOR CYCLIC BLADE MAX PITCH POSITION
ROTOR CYCLIC BLADE PITCH PCT
ROTOR GOV ACTIVE
ROTOR GOV SWITCH POS
ROTOR LATERAL TRIM PCT
ROTOR LONGITUDINAL TRIM PCT
ROTOR ROTATION ANGLE
ROTOR RPM
ROTOR RPM PCT
ROTOR TEMPERATURE
RUDDER_DEFLECTION
RUDDER_DEFLECTION_PCT
RUDDER_PEDAL_INDICATOR
RUDDER_PEDAL_POSITION
RUDDER_POSITION
RUDDER_TRIM
RUDDER TRIM MAX
RUDDER TRIM MAX
RUDDER_TRIM_DISABLED
RUDDER_TRIM_PCT
RUDDER TRIM PCT EX1

S

SEA LEVEL AMBIENT TEMPERATURE
SEA_LEVEL_PRESSURE
SELECTED_DME
SEMIBODY_LOADFACTOR_X
SEMIBODY_LOADFACTOR_Y
SEMIBODY_LOADFACTOR_YDOT
SEMIBODY_LOADFACTOR_Z
SHUTOFF_VALVE_PULLED
SIGMA_SQRT
SIMULATED_RADIUS
SIM_DISABLED
SIM ON GROUND
SIM_SHOULD_SET_ON_GROUND
SLING ACTIVE PAYLOAD STATION
SLING CABLE BROKEN
SLING CABLE EXTENDED LENGTH
SLING HOIST PERCENT DEPLOYED
SLING HOIST SWITCH
SLING HOOK IN PICKUP MODE
SLING OBJECT ATTACHED
SLOPE_TO_ATC_RUNWAY
SMART_CAMERA_ACTIVE
SMART_CAMERA_INFO
SMART_CAMERA_LIST
SMART_CAMERA_LIST_DESCRIPTION
SMOKESYSTEM_AVAILABLE
SMOKE_ENABLE
SPEAKER_ACTIVE
SPOILERS_ARMED
SPOILER_AVAILABLE
SPOILERS_HANDLE_POSITION
SPOILERS_LEFT_POSITION
SPOILERS_RIGHT_POSITION
STALL_ALPHA
STALL_HORN_AVAILABLE
STALL_PROTECTION_OFF_LIMIT
STALL_PROTECTION_ON_GOAL
STALL_PROTECTION_ON_LIMIT
STALL WARNING
STANDARD_ATM_TEMPERATURE
STATIC_CG_TO_GROUND
STATIC_PITCH
STEER_INPUT_CONTROL
STROBES_AVAILABLE
STROBE_FLASH
STRUC_AIRSPEED_HOLD_PID_CONSTS
STRUC_HEADING_HOLD_PID_CONSTS
STRUCT_AMBIENT_WIND
STRUCT_BODY_ROTATION_ACCELERATION
STRUCT_BODY_ROTATION_VELOCITY
STRUCT_BODY_VELOCITY
STRUCT_DAMAGEVISIBLE
STRUCT_ENGINE_POSITION
STRUCT_EYEPOINT_DYNAMIC_ANGLE
STRUCT_EYEPOINT_DYNAMIC_OFFSET
STRUCT_LATLONALT
STRUCT_LATLONALTPBH
STRUCT_PBH32
STRUCT_REALISM_VARS
STRUCT ROTOR POSITION
STRUCT_SURFACE_RELATIVE_VELOCITY
STRUCT_WORLDVELOCITY
STRUCT_WORLD_ACCELERATION
STRUCT_WORLD_ROTATION_VELOCITY
STRUCTURAL_DEICE_SWITCH
STRUCTURAL_ICE_PCT
SUCTION_PRESSURE
SURFACE_CONDITION
SURFACE_INFO_VALID
SURFACE_RELATIVE_GROUND_SPEED
SURFACE_TYPE
SYSTEMS_AVAILABLE

T

TACAN_ACTIVE_CHANNEL
TACAN_ACTIVE_MODE
TACAN_AVAILABLE
TACAN DRIVES NAV
TACAN OBS
TACAN_STANDBY_CHANNEL
TACAN_STANDBY_MODE
TACAN STATION CDI
TACAN_STATION_DISTANCE
TACAN STATION IDENT
TACAN_STATION_LATLONALT
TACAN STATION RADIAL
TACAN STATION RADIAL ERROR
TACAN STATION TOFROM
TACAN VOLUME
TAIL ROTOR BLADE PITCH PCT
TAIL ROTOR PEDAL POSITION
TAILHOOK_HANDLE
TAILHOOK_POSITION
TAILWHEEL_LOCK_ON
TCAS INTRUDER BEARING
TCAS INTRUDER DATA
TCAS INTRUDER DISTANCE
TCAS INTRUDER NETWORK ID
TCAS INTRUDER RELATIVE ALTITUDE
TCAS INTRUDER RELATIVE SPEED
TCAS INTRUDER VERTICAL SPEED
TCAS MODE
TCAS RECEIVED RESOLUTION ADVISORY
TCAS SEND RESOLUTION ADVISORY
THROTTLE_LOWER_LIMIT
TITLE
TOE_BRAKES_AVAILABLE
TOTAL_AIR_TEMPERATURE
TOTAL_VELOCITY
TOTAL_WEIGHT
TOTAL_WEIGHT_CROSS_COUPLED_MOI
TOTAL_WEIGHT_PITCH_MOI
TOTAL_WEIGHT_ROLL_MOI
TOTAL_WEIGHT_YAW_MOI
TOTAL_WORLD_VELOCITY
TOW CABLE RELEASE REASON
TOW CABLE TENSION
TOW CONNECTION
TOW PLANE CONNECTION
TOW RELEASE HANDLE
TOW WINCH CONNECTION
TRACK_IR_ENABLE
TRAILING_EDGE_FLAPS_LEFT_ANGLE
TRAILING_EDGE_FLAPS_LEFT_INDEX
TRAILING_EDGE_FLAPS_LEFT_PERCENT
TRAILING_EDGE_FLAPS_RIGHT_ANGLE
TRAILING_EDGE_FLAPS_RIGHT_INDEX
TRAILING_EDGE_FLAPS_RIGHT_PERCENT
TRANSPONDER_AVAILABLE
TRANSPONDER_CODE
TRANSPONDER_IDENT
TRANSPONDER_STATE
TRUE_AIRSPEED_SELECTED
TURB_ENG_AFTERBURNER
TURB_ENG_AFTERBURNER_PCT_ACTIVE
TURB_ENG_AFTERBURNER_STAGE_ACTIVE
TURB_ENG_BLEED_AIR
TURB_ENG_COMMANDED_N1
TURB_ENG_CONDITION_LEVER_POSITION
TURB_ENG_CORRECTED_FF
TURB_ENG_CORRECTED_N1
TURB_ENG_CORRECTED_N2
TURB_ENG_FREE_TURBINE_TORQUE
TURB_ENG_FUEL_AVAILABLE
TURB ENG FUEL EFFICIENCY LOSS
TURB_ENG_FUEL_FLOW_PPH
TURB_ENG_HIGH_IDLE
TURB_ENG_IGNITION_SWITCH
TURB_ENG_IGNITION_SWITCH_EX1
TURB_ENG_IS_IGNITING
TURB_ENG_ITT
TURB ENG ITT COOLING EFFICIENCY LOSS
TURB_ENG_JET_THRUST
TURB_ENG_LOW_IDLE
TURB_ENG_MASTER_STARTER_SWITCH
TURB_ENG_MAX_TORQUE_PERCENT
TURB_ENG_N1
TURB ENG N1 LOSS
TURB_ENG_N2
TURB_ENG_NUM_TANKS_USED
TURB_ENG_PRESSURE_RATIO
TURB_ENG_PRIMARY_NOZZLE_PERCENT
TURB_ENG_REVERSE_NOZZLE_PERCENT
TURB_ENG_TANKS_USED
TURB_ENG_TANK_SELECTOR
TURB_ENG_THROTTLE_COMMANDED_N1
TURB ENG THRUST EFFICIENCY LOSS
TURB_ENG_VIBRATION
TURN_COORDINATOR_BALL
TURN_COORDINATOR_BALL_INV
TURN_INDICATOR_RATE
TURN_INDICATOR_SWITCH
TYPICAL_DESCENT_RATE

U

UNLIMITED_FUEL
UNUSABLE_FUEL_TOTAL_QUANTITY
USER_INPUT_ENABLED

V

VARIOMETER MAC CREADY SETTING
VARIOMETER NETTO
VARIOMETER RATE
VARIOMETER SPEED TO FLY
VARIOMETER SPEED TO FLY GLIDE RATIO
VARIOMETER SWITCH
VARIOMETER TOTAL ENERGY
VELOCITY_BODY_X
VELOCITY_BODY_Y
VELOCITY_BODY_Z
VELOCITY_WORLD_X
VELOCITY_WORLD_Y
VELOCITY_WORLD_Z
VERTICAL_SPEED
VISUAL MODEL RADIUS

W

WAGON BACK LINK ORIENTATION
WAGON BACK LINK START POSZ
WAGON FRONT LINK LENGTH
WAGON FRONT LINK ORIENTATION
WAGON FRONT LINK START POSZ
WARNING_FUEL
WARNING_FUEL_LEFT
WARNING_FUEL_RIGHT
WARNING_LOW_HEIGHT
WARNING_OIL_PRESSURE
WARNING_VACUUM
WARNING_VACUUM_LEFT
WARNING_VACUUM_RIGHT
WARNING_VOLTAGE
WATER BALLAST EVERY VALVE OPEN
WATER BALLAST TANK CAPACITY
WATER BALLAST TANK NUMBER
WATER BALLAST TANK QUANTITY
WATER BALLAST VALVE
WATER BALLAST VALVE FLOW RATE
WATER_LEFT_RUDDER_EXTENDED
WATER_LEFT_RUDDER_STEER_ANGLE
WATER_LEFT_RUDDER_STEER_ANGLE_PCT
WATER_RIGHT_RUDDER_EXTENDED
WATER_RIGHT_RUDDER_STEER_ANGLE
WATER_RIGHT_RUDDER_STEER_ANGLE_PCT
WATER_RUDDER_HANDLE_POSITION
WEAR AND TEAR CHECK PROGRESSION
WEAR AND TEAR EXPOSED PARTS LEVEL
WEAR AND TEAR EXPOSED PARTS LOWEST LEVEL
WEAR AND TEAR IS FAILED
WEAR AND TEAR IS WEAK
WEAR AND TEAR LEVEL
WEAR AND TEAR WEAK VALUE
WHEEL_ROTATION_ANGLE
WHEEL_RPM
WINDSHIELD_DEICE_SWITCH
WINDSHIELD_RAIN_EFFECT_AVAILABLE
WINDSHIELD_WIND_VELOCITY
WING_AREA
WING_FLEX_PCT
WING_SPAN
WISKEY_COMPASS_INDICATION_DEGREES

Y

YAW STRING ANGLE
YAW STRING PCT EXTENDED
YOKE X INIDICATOR
YOKE X POSITION
YOKE X POSITION WITH AP
YOKE Y INIDICATOR
YOKE Y POSITION
YOKE Y POSITION WITH AP

Z

ZERO_LIFT_ALPHA

Convenience SimVars

Within the simulation variables, there are some which we have labeled as convenience SimVars. What this means is that while the SimVar exists within the code and can be used like any other SimVar, it has no effect on the actual simulation and is there as a convenience for you to use in custom logic. This just means just means that any behaviour you want the SimVar to have must be created by you though the use of programmed logic in the model behaviour files, JS, or WASM. Such convenince variables are flagged as such with an asterisk *.

Note on SimVar Data Types

When accessing SimVars using the SimConnect API, you would first create a data definition using the function SimConnect_AddToDataDefinition and in that you would tell the simulation the data type for the variable. By default this is a 64 bit float, but for most simulation variables this can be almost any appropriate data type (that fits the unit of the SimVar) and the same data type should be used when getting or setting the value later. When a specific data type is required - for example SIMCONNECT_DATA_LATLONALT - this will be mentioned in the description for the variable.

NOTE: SimConnect has no BOOL data type. For this kind of value, you can use an int or a float, and the simulation will interpret 0 as false, and anything over 0 will be interpreted as true.

Note On SimVars In Multiplayer

Previous iterations of Flight Simulator permitted the communication of SimVars between aircraft when multiplayer was active, either within a shared cockpit or to all aircraft. However Microsoft Flight Simulator 2024 does not have the same concept of shared cockpit as previous versions, as such only a small number of variables are communicated between all aircraft. The table below lists all of these variables, and they are also flagged within the SimVar descriptions on their respective pages. Note that the SimVars are split into two categories where:

Near: these SimVars are transmitted to all aircraft within a 500m radius.
Far: these SimVars are transmitted to all aircraft up to a maximum radius of 10,000m.

NEAR (up to 500m)	FAR (up to 10,000m)
`AILERON LEFT DEFLECTION PCT`	`DISK BANK ANGLE`
`AILERON RIGHT DEFLECTION PCT`	`DISK BANK PCT`
`AILERON TRIM PCT`	`DISK CONING PCT`
`CENTER WHEEL ROTATION ANGLE`	`DISK PITCH ANGLE`
`ELEVATOR DEFLECTION PCT`	`DISK PITCH PCT`
`ENG RPM ANIMATION PERCENT`	`ENG ROTOR RPM`
`FLAPS CURRENT SPEED LIMITATION`	`GENERAL ENG COMBUSTION`
`FLAPS_HANDLE_PERCENT`	`GENERAL ENG COMBUSTION SOUND PERCENT`
`GEAR_ANIMATION_POSITION`	`GENERAL ENG PCT MAX RPM`
`GEAR_CENTER_STEER_ANGLE`	`GENERAL ENG RPM`
`GEAR_LEFT_STEER_ANGLE`	`GROUND_VELOCITY`
`GEAR_POSITION`	`LIGHT_BEACON`
`GEAR_RIGHT_STEER_ANGLE`	`LIGHT_LANDING`
`GEAR_STEER_ANGLE`	`LIGHT_LOGO`
`GENERAL ENG STARTER ACTIVE`	`LIGHT_NAV`
`LEADING_EDGE_FLAPS_LEFT_PERCENT`	`LIGHT_PEDESTRAL`
`LEADING_EDGE_FLAPS_RIGHT_PERCENT`	`LIGHT_RECOGNITION`
`LIQUID DROPPING DOOR OPEN TARGET`	`LIGHT_STATES`
`LIQUID DROPPING SCOOP OPEN TARGET`	`LIGHT_STROBE`
`PROP MAX RPM PERCENT`	`LIGHT_STROBE_ON`
`PROP ROTATION ANGLE`	`LIGHT_TAXI`
`PROP THRUST`	`LIGHT_WING`
`RUDDER_DEFLECTION_PCT`	`PROP BETA`
`SPOILERS_LEFT_POSITION`	`PROP RPM`
`SPOILERS_RIGHT_POSITION`	`ROTOR COLLECTIVE BLADE PITCH PCT`
`TRAILING_EDGE_FLAPS_LEFT_PERCENT`	`ROTOR CYCLIC BLADE PITCH PCT`
`TRAILING_EDGE_FLAPS_RIGHT_PERCENT`	`ROTOR CYCLIC BLADE MAX PITCH POSITION`
`TURB_ENG_AFTERBURNER`	`ROTOR LATERAL TRIM PCT`
`TURB_ENG_AFTERBURNER_PCT_ACTIVE`	`ROTOR LONGITUDINAL TRIM PCT`
`TURB_ENG_AFTERBURNER_STAGE_ACTIVE`	`ROTOR ROTATION ANGLE`
`SIM ON GROUND`	`ROTOR RPM`
	`SIM ON GROUND`
	`TURB_ENG_N1`
	`TURB_ENG_N2`
	`TURB_ENG_REVERSE_NOZZLE_PERCENT`
	`TURN_INDICATOR_RATE`
	`VELOCITY_WORLD_X`
	`VELOCITY_WORLD_Y`
	`VELOCITY_WORLD_Z`

Simvar Watcher

An essential tool when working with the various simulation variables and setting up an aircraft is the Simvar Watcher tool:

The Simvar Watcher This tool permits you to connect to the simulation in real-time and view the values of almost any SimVar available, as well as set the SimVar to a different value (if the SimVar is settable). Find out more information on this useful tool here:

SimvarWatcher

SimVars And RPN

When creating add-ons for aircraft - primarily Instruments - you will need to be able to access Simulation Variables and change them based on user input in the form of Key Events. Both using SimVar values and using input key events is done using operations written in RPN, as explained below. Note that you can also find many use-cases and examples in the different ModelBehavior templates.

SimVars permit you to get the state of a component, or the state of something in the simulation, and they are generally accessed using the following RPN format:

(A:[simvar_name]:[simvar_index], [units])

Note that the "index" value is only required by a few SimVars. Here are some simple examples:

(A:SIM ON GROUND, Bool)
(A:AIRSPEED TRUE, Knots)
(A:TURB ENG IGNITION SWITCH EX1:1, Enum)

Sometimes a SimVar will require two additional index values, for example the SimVar CIRCUIT CONNECTION ON requires a circuit index and a bus index. Normally this would be written like this:

2 (>A:BUS LOOKUP INDEX, Number) (A:CIRCUIT CONNECTION ON:45, Bool)

It should be noted that in many cases you can (and should) use the name of a component, rather than it's index, since - with modular SimObjects - it is possible that indices can change, while names should always be unique to each component. Using the name instead of an index follows this format:

<SIMVAR>:'<NAME>'_n

So, for example, using the HYDRAULIC VALVE ACTIVE SimVar, we would have something like the following:

(A:HYDRAULIC VALVE ACTIVE:'VALVE_GEAR_LEFT_1'_n, Bool)

Some SimVars will permit an alternative "shorthand" method of using the two indices, like this:

2 (A:1:CIRCUIT CONNECTION ON:45, Bool)

Here, the 1: after the A: is used to tell the sim to send the top value on the stack to the SimVar. This shorthand method is ONLY applicable to the following SimVars:

BUS CONNECTION ON
BATTERY CONNECTION ON
ALTERNATOR CONNECTION ON
CIRCUIT CONNECTION ON
EXTERNAL POWER CONNECTION ON
BUS BREAKER PULLED
BATTERY BREAKER PULLED
ALTERNATOR BREAKER PULLED
CIRCUIT BREAKER PULLED
EXTERNAL POWER BREAKER PULLED

Finally it should be noted that sometimes you will see simulation variables written using snake case, and prefixed with SIMVAR_, as that is how they appear in the simulation code itself. However when using them in RPN, you should omit the SIMVAR part as well as the _. For example:

SIMVAR_CIRCUIT_ON -> (A:CIRCUIT ON:1, Bool)