King Air 350 speed brakes explained: learn what it uses instead, when gear and flaps add drag, and why reverse is ground-only.
No. The standard Beechcraft King Air 350 does not have dedicated aerodynamic speed brakes or flight spoilers. Pilots control speed with power, pitch, propeller settings, flaps and—within approved limits—the landing gear. Propeller beta or reverse is for ground use after touchdown, not as an airborne speed brake.
What does the King Air 350 use instead?
The King Air 350 sheds speed by managing energy first, then adding drag through its normal approach and landing configuration at the appropriate time.
| Control or device | Normal use | Key restriction |
|---|---|---|
| Speed brake or spoiler | Not fitted in the standard configuration | There is no normal cockpit speed-brake control |
| Power and pitch | Primary airborne speed and descent-path control | A steep descent may be impossible without accelerating if power is already low |
| Flaps | Add lift and drag during approach and landing | Extend only below the published flap limit and when appropriate for the approach |
| Landing gear | Adds substantial drag and prepares the aircraft for landing | Select only below the applicable gear limit; it is not a general-purpose speed brake |
| Propeller beta or reverse | Ground deceleration after touchdown | Do not select it in flight |
| Wheel brakes | Ground deceleration and taxi control | Available only after the wheels are firmly on the surface |
Spoilers serve as aerodynamic brakes on many jets and some other aircraft. Our explanation of how spoilers change lift and drag covers that distinction, while the general operating rules for aircraft speed brakes apply only to types actually equipped with them.
How do you slow a King Air 350 in flight?
Reduce power early, control the descent path with pitch, and delay drag-producing configuration changes until the aircraft is within the published limits.
- Plan the descent: Start down with enough distance to avoid arriving high and fast. A constant steep descent cannot be maintained indefinitely without gaining speed once power is already near flight idle.
- Reduce power smoothly: Use the power levers while maintaining the propeller and condition-lever settings required by the aircraft checklist.
- Adjust the flight path: If the aircraft remains fast, reduce the descent rate or level temporarily. Trying to hold both an excessive descent rate and a lower airspeed is a common cause of unstable approaches.
- Configure within limits: Select approach flaps and landing gear only below their respective limiting speeds. Gear may legitimately provide extra drag during approach, but it should be part of a planned configuration change rather than an improvised speed-brake substitute.
- Stabilise before final: Establish the required speed, power, flap and gear configuration early enough to complete the landing checklist. Our King Air 350 approach and landing sequence covers the next phase.
Exact flap and gear limits depend on the aircraft variant, modification status and simulator model. Use the applicable AFM or POH, cockpit placards and add-on documentation rather than copying figures from a different King Air. Do not move the condition levers or enter beta merely to create drag.
Can propeller reverse be used as a speed brake?
No—propeller beta and reverse are ground operating ranges, not airborne speed-control systems.
After touchdown, ground fine pitch reduces residual forward thrust and reverse blade angle produces decelerating thrust. Use them according to the aircraft procedure while maintaining directional control and observing engine and propeller limits. Moving the power levers back to normal flight idle during descent is not the same as entering beta.
In a simulator, an incorrectly configured throttle axis may pass through the flight-idle detent and command reverse while airborne. Set a detent, reverse-range button or separate axis range as supported by the simulator, then verify the power levers cannot enter beta accidentally in flight.
Why does my simulator show a speed-brake control?
Simulator control menus contain generic bindings for many aircraft, so the presence of a speed-brake assignment does not mean the King Air 350 has that system.
- A faithful standard King Air model should ignore the generic speed-brake command and show no spoiler deployment.
- If the command causes visible panels to deploy or produces extra drag, that is an add-on feature, developer simplification or configuration error—not proof that the standard aircraft carries speed brakes.
- Check the model's documentation in case it represents a specifically modified aircraft with approved equipment.
- Remove conflicting speed-brake or spoiler assignments from the King Air controller profile if they cause unintended behaviour.
For real-world flying, an individually modified aircraft must be operated according to its approved flight-manual supplement. For simulation, follow the model documentation but recognise when a generic simulator function departs from the standard King Air 350.