Aircraft Brake And 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
You can find a complete index of all available SimVars here: SimVar Index
Brakes
| Simulation Variable | Index | Description | Units | Settable |
|---|---|---|---|---|
ANTISKID BRAKES ACTIVE | N/A | True if antiskid brakes active. This can be set using the AntiSkidActive parameter. | Bool | |
AUTOBRAKES ACTIVE | N/A | Whether or not the AutoBrakes are currently active. | Bool | |
AUTO BRAKE SWITCH CB | N/A | Auto brake switch position | Number | |
BRAKE DEPENDENT HYDRAULIC PRESSURE | N/A | Brake dependent hydraulic pressure reading | Pounds per square foot (psf) | |
BRAKE INDICATOR | N/A | Brake on indication | Position (0 to 16K)0 = off16K = full | |
BRAKE LEFT POSITION | N/A | Percent left brake | Position (0 to 32K)0 = off32K = full | |
BRAKE LEFT POSITION EX1 | N/A | Triggers a brake pressure increase on the left brake regardless of the value passed. | Position (0 to 32K)0 = off32K = full | |
BRAKE LEFT TEMPERATURE | N/A | The current temperature - in degrees kelvin - of the left brake. | Kelvin | |
BRAKE LEFT TEMPERATURE EFFECT | N/A | The current efficiency of the left brake, based on the current brake temperature. | Percent Over 100 | |
BRAKE LEFT WEIGHT REMAINING | N/A | The current weight remaining of the left brake, ie: how worn the left brake is. | Percent Over 100 | |
BRAKE PARKING INDICATOR | N/A | Parking brake indicator | Bool | |
BRAKE PARKING POSITION | N/A | Gets the parking brake position - either on (true) or off (false). | Bool | |
BRAKE RIGHT POSITION | N/A | Percent right brake | Position (0 to 32K)0 = off32K = full | |
BRAKE RIGHT POSITION EX1 | N/A | Triggers a brake pressure increase on the right brake regardless of the value passed. | Position (0 to 32K)0 = off32K = full | |
BRAKE RIGHT TEMPERATURE | N/A | The current temperature - in degrees kelvin - of the right brake. | Kelvin | |
BRAKE RIGHT TEMPERATURE EFFECT | N/A | The current efficiency of the right brake, based on the current brake temperature. | Percent Over 100 | |
BRAKE RIGHT WEIGHT REMAINING | N/A | The current weight remaining of the right brake, ie: how worn the right brake is. | Percent Over 100 | |
PARKING BRAKE AVAILABLE | N/A | Whether or not the aircraft has a parking brake. | Bool | |
REJECTED TAKEOFF BRAKES ACTIVE | N/A | Whether or not the rejected takeoff brakes are currently active. | Bool | |
TOE BRAKES AVAILABLE | N/A | True if toe brakes are available | Bool |
Contact Points
Most of these SimVars require the name of the component that they target, as defined in the point.N hash-map. This name is given using the following format:
[SimVar]:'[COMPONENT_NAME]'_nFor example:
(A:CONTACT POINT IS SKIDDING:'Wheel_Front'_n, Enum)| Simulation Variable | Index | Description | Units | Settable |
|---|---|---|---|---|
CONTACT POINT COMPRESSION | Contact Point Name (or index) | The percentage value representing the amount the named contact point is compressed. | Position | |
CONTACT POINT IS ON GROUND | Contact Point Name (or index) | Returns true if the named contact point is on the ground, or will return false otherwise. | Bool | |
CONTACT POINT IS SKIDDING | Contact Point Name (or index) | Returns true if the named contact point is skidding, or will return false otherwise. | Bool | |
CONTACT POINT POSITION | Contact Point Name (or index) | The currently extended position of the (retractable) named contact point, expressed as a percentage. | Position | |
CONTACT POINT SKIDDING FACTOR | Contact Point Name (or index) | The skidding factor associated with the named contact point, from 0 to 1. | Percent Over 100 | |
CONTACT POINT STEER ANGLE | Contact Point Name (or index) | This is the steering angle for the named contact point, where a negative value is to the left, and a positive value is to the right.NOTE: This should be used instead of the equivalent GEAR_ SimVars when using modular aircraft. | Radians | |
CONTACT POINT STEER ANGLE PCT | Contact Point Name (or index) | This is the steering angle for the named contact point - expressed as a percentage - where a negative value is to the left, and a positive value is to the right.NOTE: This should be used instead of the equivalent GEAR_ SimVars when using modular aircraft. | Percent Over 100 | |
CONTACT POINT WATER DEPTH | Contact Point Name (or index) | This returns the depth of the water for the named contact point. | 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. The available indices are given in the table here: Landing Gear Indices
| Simulation Variable | Index | Description | Units | Settable |
|---|---|---|---|---|
AUX WHEEL ROTATION ANGLE | N/A | Aux wheel rotation angle (rotation around the axis for the wheel). | Radians | |
AUX WHEEL RPM | N/A | Rpm of fourth set of gear wheels. | RPM | |
CENTER WHEEL ROTATION ANGLE | N/A | 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 | N/A | Center landing gear rpm. | RPM | |
GEAR ANIMATION POSITION | Landing Gear 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 | N/A | Percent auxiliary gear extended. | Percent Over 100 | |
GEAR AUX STEER ANGLE | N/A | 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 | N/A | Aux steer angle as a percentage. | Percent Over 100 | |
GEAR CENTER POSITION | N/A | Percent center gear extended (also valid for skids). | Percent Over 100 | |
GEAR CENTER STEER ANGLE | N/A | 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 | N/A | Center steer angle as a percentage. | Percent Over 100 | |
GEAR DAMAGE BY SPEED | N/A | True if gear has been damaged by excessive speed. | Bool | |
GEAR EMERGENCY HANDLE POSITION | N/A | True if gear emergency handle applied. | Bool | |
GEAR HANDLE POSITION | N/A | The gear handle position, where 0 means the handle is retracted and 1 is the handle fully applied. | Percent Over 100 | |
GEAR HYDRAULIC PRESSURE | N/A | Gear hydraulic pressure. | Pound force per square foot (psf) | |
GEAR IS ON GROUND | Landing Gear Index | True if the gear is on the ground. | Bool | |
GEAR IS SKIDDING | Landing Gear Index | True if the gear is skidding. | Bool | |
GEAR LEFT POSITION | N/A | Percent left gear extended (also valid for skids). | Percent Over 100 | |
GEAR LEFT STEER ANGLE | N/A | 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 | N/A | Left steer angle as a percentage. | Percent Over 100 | |
GEAR POSITION | Landing Gear Index | Position of the indexed landing gear. The actual value will depend on whether you are getting or setting the SimVar value. When getting the value, 0 is fully raised, and 1 is fully extended. When setting the value, you should supply one of the given enum values.NOTE: This is available in multiplayer to all near aircraft. See here for more information: Note On SimVars In Multiplayer. | On get value: Percent Over 100On set Value - Enum:0 = unknown1 = up2 = down | |
GEAR RIGHT POSITION | N/A | Percent right gear extended (also valid for skids). | Percent Over 100 | |
GEAR RIGHT STEER ANGLE | N/A | 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 | N/A | Right steer angle as a percentage. | Percent Over 100 | |
GEAR SKIDDING FACTOR | N/A | The gear skidding factor, expressed as a value between 0 and 1. | Percent Over 100 | |
GEAR SPEED EXCEEDED | N/A | True if safe speed limit for gear exceeded. | Bool | |
GEAR STEER ANGLE | Landing Gear 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 | Landing Gear Index | Alternative method of getting steer angle as a percentage. | Percent Over 100 | |
GEAR TAIL POSITION | N/A | 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 | N/A | Percent total gear extended. | Percent | |
GEAR WARNING | Landing Gear Index | Gear warnings. | Enum:0 = None1 = Gear Up2 = Amphibious Gear Up3 = Amphibious Gear Down4 = On Ground Handle Up | |
GEAR WATER DEPTH | Landing Gear Index | The depth of the gear in the water. | Centimeters | |
IS GEAR FLOATS | N/A | True if landing gear are floats | Bool | |
IS GEAR RETRACTABLE | N/A | True if gear can be retracted | Bool | |
IS GEAR SKIDS | N/A | True if landing gear is skids | Bool | |
IS GEAR SKIS | N/A | True if landing gear is skis | Bool | |
IS GEAR WHEELS | N/A | True if landing gear is wheels | Bool | |
LEFT WHEEL ROTATION ANGLE | N/A | Left wheel rotation angle (rotation around the axis for the wheel). | Radians | |
LEFT WHEEL RPM | N/A | Left landing gear rpm | RPM | |
NOSEWHEEL LOCK ON | N/A | True if the nosewheel lock is engaged. This can be set using the NosewheelLock parameter. | Bool | |
NOSEWHEEL MAX STEERING ANGLE | N/A | Can be used to get or set the maximum permitted steering angle for the nose wheel of the aircraft. | Radians | |
RETRACT FLOAT SWITCH | N/A | True if retract float switch on | Enum:-1: Retracted0: Neutral1: Extended | |
RETRACT LEFT FLOAT EXTENDED | N/A | If aircraft has retractable floats. | Percent(0 is fully retracted, 100 is fully extended) | |
RETRACT RIGHT FLOAT EXTENDED | N/A | If aircraft has retractable floats. | Percent(0 is fully retracted, 100 is fully extended) | |
RIGHT WHEEL ROTATION ANGLE | N/A | Right wheel rotation angle (rotation around the axis for the wheel). | Radians | |
RIGHT WHEEL RPM | N/A | Right landing gear rpm. | RPM | |
STEER INPUT CONTROL | N/A | Position of steering tiller. | Percent Over 100 | |
TAILWHEEL LOCK ON | N/A | True if tailwheel lock applied. This can be set using the TailwheelLock parameter. | Bool | |
WATER LEFT RUDDER EXTENDED | N/A | Percent extended. | Percent | |
WATER LEFT RUDDER STEER ANGLE | N/A | Water left rudder angle, negative to the left, positive to the right. | Percent Over 100 | |
WATER LEFT RUDDER STEER ANGLE PCT | N/A | Water left rudder angle as a percentage. | Percent Over 100 | |
WATER RIGHT RUDDER EXTENDED | N/A | Percent extended. | Percent | |
WATER RIGHT RUDDER STEER ANGLE | N/A | Water right rudder angle, negative to the left, positive to the right. | Percent Over 100 | |
WATER RIGHT RUDDER STEER ANGLE PCT | N/A | Water right rudder as a percentage. | Percent Over 100 | |
WATER RUDDER HANDLE POSITION | N/A | Position of the water rudder handle (0 handle retracted, 1 rudder handle applied). | Percent Over 100 | |
WHEEL ROTATION ANGLE | Landing Gear Index | Wheel rotation angle (rotation around the axis for the wheel). | Radians | |
WHEEL RPM | Landing Gear Index | Wheel rpm. | RPM |
Landing Gear Indices
| Index | Gear |
|---|---|
| 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 |