Learn how an Airbus throttle quadrant, thrust detents and autothrust work in a flight simulator, with setup, calibration and fault fixes.
An Airbus throttle quadrant is the pedestal control unit containing the engine thrust levers, their fixed detents and, on many replicas, engine-start and reverse-thrust controls. In a flight simulator, its axes report lever position while the aircraft software interprets each detent—IDLE, CL, FLX/MCT or TOGA—and applies the corresponding thrust logic.
In general flight simulation, “Airbus throttle quadrant” usually means an A320-family-style unit. Other Airbus types can have different lever arrangements and operating logic, so the simulated aircraft ultimately determines what each position does.
What controls are on an Airbus throttle quadrant?
An A320-style quadrant normally has two thrust levers, reverse-thrust handles and mechanical or electronic detents. Replica pedestal sets may add the engine master switches and engine mode selector, while speed-brake and flap levers are usually separate modules.
The hardware does not calculate engine thrust. It sends axis positions and switch states to the simulator; the aircraft model then decides whether that input means manual thrust, a thrust limit, reverse thrust or an autothrust mode.
What do the Airbus throttle detents do?
Each detent gives the aircraft a defined lever position instead of making the pilot hunt for an approximate percentage.
| Position | What it means in the simulator | Typical use |
|---|---|---|
| REV | Selects the reverse range when ground logic permits it | Deceleration after touchdown |
| IDLE | Commands idle thrust | Taxi, landing flare and manual deceleration |
| CL | Sets the normal climb thrust limit and gives autothrust its normal operating range | Most of the flight after thrust reduction |
| FLX/MCT | Selects flexible take-off thrust or maximum continuous thrust, depending on flight phase and aircraft condition | Reduced-thrust take-off or engine-out operation |
| TOGA | Commands take-off/go-around thrust and may trigger associated flight-guidance modes | Full-thrust take-off or go-around |
FLX is not simply a lower take-off setting chosen by feel. On a properly modelled A320, it depends on valid take-off performance data, including a flex temperature entered in the flight-management system. Use TOGA if the required FLX configuration has not been prepared.
Our practical A320 throttle-detent and calibration walkthrough covers the individual controls in greater depth.
Why do Airbus thrust levers stay still with autothrust?
On the A320-family system, autothrust changes commanded engine thrust without physically moving the levers. This is one of the main differences from an aircraft with motorised autothrottle levers.
During normal two-engine flight, the pilot places both levers in CL. Autothrust can then vary thrust between idle and the permitted climb limit while the levers remain fixed. The active thrust and guidance modes are shown on the flight mode annunciator, so the cockpit lever animation alone does not confirm what the system is doing.
A common mistake is moving the levers continuously to follow every engine-power change. With autothrust active, leave them in the commanded detent and monitor the mode annunciations instead. Our guide to the A320 displays and associated controls explains where those indications appear and how they relate to the levers.
How do you set up an Airbus throttle quadrant?
Correct setup requires the physical axis endpoints and the simulated detent zones to agree.
- Calibrate the hardware: establish the full forward, idle and reverse ranges using the device’s supported calibration method.
- Bind separate engine axes: assign each lever to its corresponding continuous throttle axis rather than throttle-increase and throttle-decrease buttons.
- Remove duplicate assignments: clear throttle bindings from unused joysticks, controllers and gamepads. Competing axes cause jumping cockpit levers.
- Check direction and travel: verify that each cockpit lever reaches idle and TOGA and moves in the same direction as the hardware.
- Calibrate the aircraft detents: if the simulated aircraft provides its own calibration page, define the centre and tolerance of IDLE, CL, FLX/MCT and TOGA there.
- Configure reverse once: use either a reverse axis range or reverse switches, according to what the aircraft supports. Assigning both often produces stuck or flickering reverse thrust.
Start with a linear response curve where possible. Use the aircraft’s dedicated detent calibration before trying to force alignment with large sensitivity changes; curves can make the positions match while leaving poor control between them.
Why do the physical and cockpit detents not line up?
Misaligned detents usually come from incomplete calibration, overlapping detent zones or the wrong aircraft profile.
- If physical CL produces FLX/MCT, recalibrate the aircraft’s CL and FLX/MCT zones and make them narrower.
- If the two levers disagree, calibrate each axis independently rather than copying one lever’s values to the other.
- If the levers twitch, add only a small dead zone and check for duplicate bindings or sensor noise.
- If reverse thrust remains active, remove the conflicting reverse-axis or button assignment.
- If autothrust will not control speed, confirm that the levers are in the required detent and inspect the flight mode annunciator; this may be an aircraft-state problem rather than a hardware fault.
Simplified or older aircraft models may treat the quadrant as an ordinary pair of throttle axes and ignore authentic Airbus detent logic. In that case, the hardware cannot add systems behaviour that the aircraft itself does not simulate.
Do you need an Airbus quadrant to fly an Airbus?
No; any accurate analogue throttle can operate a simulated Airbus. A dedicated quadrant mainly provides tactile detents, separate engine control and more natural reverse-thrust handling.
With a generic throttle, bind the normal axis and use the cockpit lever markings or on-screen detent indications. Keyboard buttons and gamepads also work, but reliably selecting CL or FLX/MCT is harder without physical feedback.
How is the quadrant used during an A320 flight?
A normal simulated A320 flight uses only a few deliberate lever movements.
- Set FLX/MCT for a correctly prepared reduced-thrust take-off, or TOGA when full take-off thrust is required.
- At the climb-thrust prompt, move the levers back to CL so autothrust can regulate thrust.
- Leave them at CL through climb, cruise, descent and approach while autothrust remains in use.
- Move the levers to IDLE when prompted during the landing flare.
- After touchdown, lift the reverse handles and select the required reverse range, then return to idle before taxi speed.
The complete simulated A320 flight sequence shows these movements in context. If the approach must be abandoned, the A320 go-around thrust and mode sequence explains what selecting TOGA should trigger.