AIRCRAFT BRAKE / LANDING GEAR VARIABLES
The tables below indicate the properties for the Simulation Variables that can be used to get and set properties related to the brakes and landing gear control systems. For information on the units listed for each variable, please see here: Simulation Variable Units
NOTE: When Microsoft Flight Simulator is running in multiplayer mode, only a small number of variables are communicated between aircraft. Those variables that are available will say so in the description as being either for "All Aircraft" or for "Shared Cockpit".
You can find a complete index of all available SimVars here: SimVar Index
Brakes
Simulation Variable  Description  Units  Settable 

ANTISKID BRAKES ACTIVE 
True if antiskid brakes active. This can be set using the AntiSkidActive parameter. 
Bool  
AUTOBRAKES ACTIVE 
Whether or not the AutoBrakes are currently active.  Bool  
AUTO BRAKE SWITCH CB 
Auto brake switch position  Number  
BRAKE DEPENDENT HYDRAULIC PRESSURE 
Brake dependent hydraulic pressure reading  Pounds per square foot (psf)  
BRAKE INDICATOR 
Brake on indication 
Position (0 to 16K) 0 = off 16K = full 

BRAKE LEFT POSITION 
Percent left brake. Note that this SimVar no longer sets the right brake percent and simply triggers a brake pressure increase regardless of the value passed. 
Position (0 to 32K) 0 = off 32K = full 

BRAKE LEFT POSITION EX1 
Triggers a brake pressure increase on the left brake regardless of the value passed. 
Position (0 to 32K) 0 = off 32K = full 

BRAKE PARKING INDICATOR 
Parking brake indicator  Bool  
BRAKE PARKING POSITION 
Gets the parking brake position  either on (true) or off (false). 
Bool 

BRAKE RIGHT POSITION 
Percent right brake. 
Position (0 to 32K) 0 = off 32K = full 

BRAKE RIGHT POSITION EX1 
Triggers a brake pressure increase on the right brake regardless of the value passed. 
Position (0 to 32K) 0 = off 32K = full 

REJECTED TAKEOFF BRAKES ACTIVE 
Whether or not the rejected takeoff brakes are currently active.  Bool  
TOE BRAKES AVAILABLE 
True if toe brakes are available  Bool 
Contact Points
Simulation Variable  Description  Units  Settable  

CONTACT POINT COMPRESSION:index 
The percentage value representing the amount the contact point is compressed. Index is from 019.  Position  
CONTACT POINT IS ON GROUND:index 
Returns true if the indexed contact point is on the ground, or will return false otherwise. Index is from 0  19.  Bool  
CONTACT POINT IS SKIDDING:index 
Returns true if the indexed contact point is skidding, or will return false otherwise. Index is from 0  19.  Bool  
CONTACT POINT POSITION:index 
The currently extended position of the (retractable) contact point, expressed as a percentage. Index is from 0  19.  Position  
CONTACT POINT SKIDDING FACTOR:index 
The skidding factor associated with the indexed contact point, from 0 to 1. Index is from 0  19.  Percent Over 100  
CONTACT POINT WATER DEPTH:index 
This returns the depth of the water for the indexed contact point. Index is from 0  19.  Feet (ft) 
Landing Gear
These SimVars are related to the landing gear of the aircraft. Note that some of them require an index to identify the landing gear. This index value should be one of the following:
 0 = Center Gear
 1 = Left Gear
 2 = Right Gear
 3 = Auxiliary Gear
 4 = Left Water Rudder
 5 = Right Water Rudder
 6 = Left Float Retracted
 7 = Right Float Retracted
 8 = Left Ski Retracted
 9 = Right Ski Retracted
 10 = Center Front Skid
 11 = Center Rear Skid
 12 = Left Front Skid
 13 = Left Rear Skid
 14 = Right Front Skid
 15 = Right Rear Skid
Simulation Variable  Description  Units  Settable 

AUX WHEEL ROTATION ANGLE 
Aux wheel rotation angle (rotation around the axis for the wheel).  Radians  
AUX WHEEL RPM 
Rpm of fourth set of gear wheels.  RPM  
CENTER WHEEL ROTATION ANGLE 
Center wheel rotation angle (rotation around the axis for the wheel). NOTE: This is available in multiplayer to all near aircraft. See here for more information: Note On SimVars In Multiplayer. 
Radians  
CENTER WHEEL RPM 
Center landing gear rpm.  RPM  
GEAR ANIMATION POSITION:index 
Percent indexed gear animation extended. NOTE: This is available in multiplayer to all near aircraft. See here for more information: Note On SimVars In Multiplayer.  Percent  
GEAR AUX POSITION 
Percent auxiliary gear extended.  Percent Over 100  
GEAR AUX STEER ANGLE 
Aux wheel angle, negative to the left, positive to the right. The aux wheel is the fourth set of landing gear, sometimes used on helicopters.  Radians  
GEAR AUX STEER ANGLE PCT 
Aux steer angle as a percentage.  Percent Over 100  
GEAR CENTER POSITION 
Percent center gear extended.  Percent Over 100  
GEAR CENTER STEER ANGLE 
Center wheel angle, negative to the left, positive to the right. NOTE: This is available in multiplayer to all near aircraft. See here for more information: Note On SimVars In Multiplayer. 
Radians  
GEAR CENTER STEER ANGLE PCT 
Center steer angle as a percentage.  Percent Over 100  
GEAR DAMAGE BY SPEED 
True if gear has been damaged by excessive speed.  Bool  
GEAR EMERGENCY HANDLE POSITION 
True if gear emergency handle applied.  Bool  
GEAR HANDLE POSITION 
The gear handle position, where 0 means the handle is retracted and 1 is the handle fully applied.  Percent Over 100  
GEAR HYDRAULIC PRESSURE 
Gear hydraulic pressure.  Pound force per square foot (psf)  
GEAR IS ON GROUND:index 
True if the gear is on the ground.  Bool  
GEAR IS SKIDDING:index 
True if the gear is skidding.  Bool  
GEAR LEFT POSITION 
Percent left gear extended.  Percent Over 100  
GEAR LEFT STEER ANGLE 
Left wheel angle, negative to the left, positive to the right. NOTE: This is available in multiplayer to all near aircraft. See here for more information: Note On SimVars In Multiplayer. 
Radians  
GEAR LEFT STEER ANGLE PCT 
Left steer angle as a percentage.  Percent Over 100  
GEAR POSITION:index 
Position of landing gear. NOTE: This is available in multiplayer to all near aircraft. See here for more information: Note On SimVars In Multiplayer. 
Enum:


GEAR RIGHT POSITION 
Percent right gear extended.  Percent Over 100  
GEAR RIGHT STEER ANGLE 
Right wheel angle, negative to the left, positive to the right. NOTE: This is available in multiplayer to all near aircraft. See here for more information: Note On SimVars In Multiplayer. 
Radians  
GEAR RIGHT STEER ANGLE PCT 
Right steer angle as a percentage.  Percent Over 100  
GEAR SKIDDING FACTOR 
The gear skidding factor, expressed as a value between 0 and 1.  Percent Over 100  
GEAR SPEED EXCEEDED 
True if safe speed limit for gear exceeded.  Bool  
GEAR STEER ANGLE:index 
Alternative method of getting the steer angle. NOTE: This is available in multiplayer to all near aircraft. See here for more information: Note On SimVars In Multiplayer. 
Radians  
GEAR STEER ANGLE PCT:index 
Alternative method of getting steer angle as a percentage.  Percent Over 100  
GEAR TAIL POSITION 
Percent tail gear extended. NOTE: This is a deprecated legacy SimVar and should not be used, as it will always return 0. 
Percent Over 100  
GEAR TOTAL PCT EXTENDED 
Percent total gear extended.  Percent  
GEAR WARNING:index 
Gear warnings. 
Enum:


GEAR WATER DEPTH 
The depth of the gear in the water.  Centimeters  
IS GEAR FLOATS 
True if landing gear are floats  Bool  
IS GEAR RETRACTABLE 
True if gear can be retracted  Bool  
IS GEAR SKIDS 
True if landing gear is skids  Bool  
IS GEAR SKIS 
True if landing gear is skis  Bool  
IS GEAR WHEELS 
True if landing gear is wheels  Bool  
LEFT WHEEL ROTATION ANGLE 
Left wheel rotation angle (rotation around the axis for the wheel).  Radians  
LEFT WHEEL RPM 
Left landing gear rpm  RPM  
NOSEWHEEL LOCK ON 
True if the nosewheel lock is engaged. This can be set using the NosewheelLock parameter. 
Bool  
NOSEWHEEL MAX STEERING ANGLE 
Can be used to get or set the maximum permitted steering angle for the nose wheel of the aircraft.  Radians  
RETRACT FLOAT SWITCH 
True if retract float switch on 
Enum:


RETRACT LEFT FLOAT EXTENDED 
If aircraft has retractable floats. 
Percent (0 is fully retracted, 100 is fully extended) 

RETRACT RIGHT FLOAT EXTENDED 
If aircraft has retractable floats. 
Percent (0 is fully retracted, 100 is fully extended) 

RIGHT WHEEL ROTATION ANGLE 
Right wheel rotation angle (rotation around the axis for the wheel).  Radians  
RIGHT WHEEL RPM 
Right landing gear rpm.  RPM  
STEER INPUT CONTROL 
Position of steering tiller.  Percent Over 100  
TAILWHEEL LOCK ON 
True if tailwheel lock applied. This can be set using the TailwheelLock parameter. 
Bool  
WATER LEFT RUDDER EXTENDED 
Percent extended.  Percent  
WATER LEFT RUDDER STEER ANGLE 
Water left rudder angle, negative to the left, positive to the right.  Percent Over 100  
WATER LEFT RUDDER STEER ANGLE PCT 
Water left rudder angle as a percentage.  Percent Over 100  
WATER RIGHT RUDDER EXTENDED 
Percent extended.  Percent  
WATER RIGHT RUDDER STEER ANGLE 
Water right rudder angle, negative to the left, positive to the right.  Percent Over 100  
WATER RIGHT RUDDER STEER ANGLE PCT 
Water right rudder as a percentage.  Percent Over 100  
WATER RUDDER HANDLE POSITION 
Position of the water rudder handle (0 handle retracted, 1 rudder handle applied).  Percent Over 100  
WHEEL ROTATION ANGLE:index 
Wheel rotation angle (rotation around the axis for the wheel).  Radians  
WHEEL RPM:index 
Wheel rpm.  RPM 