Fix a FlightGear rudder that won't steer: check axis bindings, nosewheel steering, tillers, differential brakes, toe-brake conflicts and aircraft systems.
In FlightGear, the rudder controls yaw, not bank, so it will not turn an airborne aircraft correctly by itself. On the ground, steering may use linked nosewheel or tailwheel steering, a separate tiller, or differential brakes. First confirm the rudder input, then identify how that aircraft steers.
Does the rudder turn a FlightGear aircraft in the air?
No: in normal flight, ailerons bank the aircraft to produce a turn, while the rudder keeps that turn coordinated.
Rudder alone yaws the nose and usually creates a sideslip, followed by some secondary roll, rather than a clean change of direction. Bank with the ailerons, then use enough rudder to keep the slip-and-skid indicator centred. Rudder is also used for crosswind correction, asymmetric thrust and certain aerobatic or recovery manoeuvres.
At very low airspeed, an aerodynamic rudder has little authority because there is little airflow over it. Propeller slipstream can make it effective on some aircraft before much forward speed develops, but the result depends on that aircraft's FlightGear flight-dynamics model.
How do I check whether FlightGear is receiving rudder input?
The quickest diagnosis is to compare visible rudder movement, keyboard commands and the assigned hardware axis.
- Watch the rudder surface. Select an external view and move the pedals or twist grip fully left and right. The rudder should follow smoothly once any control lock is released and, on aircraft with powered controls, the required systems are operating.
- Test the keyboard commands. Give the simulator view keyboard focus, then use the rudder-left, rudder-right and centre commands listed in our reference to FlightGear's default keyboard bindings. If the keyboard moves the rudder but the pedals do not, the aircraft model is responding and the problem is in the controller setup.
- Check the device outside FlightGear. Use the operating system's controller test to confirm that the rudder axis travels smoothly through its full range and returns close to centre. Missing, jumping or permanently offset input must be corrected before changing simulator settings.
- Assign one axis to rudder. In FlightGear's controller configuration, move the pedals or twist grip and bind that physical axis to rudder. Menu wording varies between FlightGear builds and operating systems; our guide to setting up pedals, joystick twist and keyboard rudder input covers the assignment and reversal process.
- Remove duplicate bindings. Clear rudder assignments from unused gamepads, joystick twist axes and other connected devices. A mistake we see constantly is leaving both the pedals and twist grip active, allowing a noisy or off-centre device to fight the intended input.
- Check direction, centre and brakes. Pressing the left pedal should move the rudder's trailing edge left. Reverse the axis only if its direction is wrong, and use a modest dead zone only when the centred hardware produces a small unwanted signal. Check that each toe-brake axis also returns fully to its released position.
- Disable systems that alter the test. Temporarily disconnect the autopilot and yaw damper and turn off auto-coordination. These can command or mask rudder movement, making a valid axis appear ineffective.
- Compare another aircraft. Load a straightforward bundled aircraft. If the same controller works there, do not reset every global binding; investigate the original aircraft's steering controls and systems instead.
If the axis is absent, reversed, twitchy or shared with a brake, use our broader rudder-pedal troubleshooting checklist for USB detection, calibration and duplicate-axis conflicts.
Why does the rudder move but not steer while taxiing?
If the rudder surface moves but the aircraft will not turn during taxi, the input probably works; the next task is to identify how the wheel and brakes are modelled.
| What happens | Likely cause | What to do |
|---|---|---|
| Rudder moves but the nosewheel stays centred | The aircraft uses a separate tiller, free-castoring wheel or aircraft-specific steering command | Use the tiller or differential brakes rather than expecting the rudder surface to steer the wheel |
| Wheel turns but the aircraft does not change direction | The aircraft is stationary, a brake remains applied, steering is unpowered, or only the visual animation is working | Release the parking brake, confirm both toe brakes are off and retest while rolling slowly with the required systems operating |
| Pedals work but produce only a wide turn | Pedal-controlled nosewheel travel is limited, especially on larger aircraft | Use the tiller for tight turns; pedals may be intended only for runway tracking and small taxi corrections |
| The aircraft veers with the pedals centred | A toe brake is dragging, another rudder axis is active, or wind and propeller effects are stronger than expected | Inspect both brake axes, remove duplicate inputs and retest in calm conditions |
| Steering becomes weaker as speed increases | The model reduces nosewheel angle at higher ground speed | Slow down before a tight turn and avoid holding full steering input at excessive taxi speed |
Do not judge ground steering while parked: the wheel may turn visually, but the aircraft cannot follow it until the tyres are rolling. Test at low taxi speed with small power changes. Excess power can overwhelm the steering, particularly in a taildragger.
Which ground-steering control should I use?
Use the steering system implemented by that aircraft rather than assuming every model links the pedals directly to the wheel.
- Linked nosewheel: use the rudder pedals or joystick twist for normal taxi steering.
- Separate tiller: use the tiller for tight turns and the pedals for smaller corrections. Some airliner models deliberately limit pedal steering.
- Free-castoring nosewheel: steer with independent left and right brakes, assisted by gentle power. Moving the pedals may deflect the rudder without turning the wheel.
- Tailwheel aircraft: check whether the tailwheel is linked, lockable or free-castoring. Tight turns may need differential braking, while abrupt power or brake input can start a ground loop.
Why is only one FlightGear aircraft affected?
If steering works in another aircraft, the global rudder assignment is probably correct and the affected model's systems or configuration are the likely cause.
- Control or gust lock: release it before expecting the rudder or steering to move.
- Hydraulic or electrical power: complex aircraft may require powered systems for flight controls, nosewheel steering or both.
- Steering mode or disconnect: look for an aircraft-specific tiller, steering switch, tailwheel lock or towing disconnect.
- Automation: disconnect the autopilot, yaw damper and auto-coordination while testing manual input.
- Aircraft-specific commands: an add-on may define controls differently from a bundled aircraft, so check its built-in help and cockpit controls.
- Incomplete modelling: a moving cockpit control or wheel animation does not prove that the flight-dynamics or ground-contact model is receiving the same command.
Test the aircraft with its controls unlocked, required systems powered and assistance disabled. If FlightGear shows valid rudder input but neither the control surface nor steering responds, while a bundled aircraft works normally, the fault is within that aircraft package rather than the pedals.
What does each rudder test result mean?
The point at which the response stops identifies the part of the control chain that needs attention.
- Keyboard works, pedals do not: correct the controller detection, calibration or rudder-axis assignment.
- Rudder surface moves but has little effect in flight: build airspeed and use aileron to bank; do not expect rudder alone to make a coordinated turn.
- Rudder moves but the wheel does not: use the aircraft's tiller, differential brakes or tailwheel controls.
- Aircraft pulls to one side: check for a reversed or dragging toe-brake axis, an off-centre controller and duplicate bindings.
- Every control works except in one aircraft: check that model's locks, power, steering mode and aircraft-specific implementation.