Learn how an aircraft turns in flight using banked lift, ailerons, rudder and elevator, including coordination, load factor, turn rate and radius.
A conventional fixed-wing aircraft turns by banking, which tilts its lift vector. Part of that lift then acts sideways and curves the flight path, while the remaining vertical component supports weight. Ailerons establish the bank, rudder keeps the manoeuvre coordinated, and elevator controls pitch and altitude.
For Aviation & Real-World Flying, this explanation applies to conventional fixed-wing aircraft. Helicopters and VTOL aircraft use different controls, but the same physical principle applies: the net aerodynamic force needs a sideways component to bend the flight path.
Lift acts roughly perpendicular to the wings. With the wings level, it points mainly upwards; when the aircraft banks, lift divides into vertical and horizontal components. The horizontal component provides the inward, or centripetal, force that continuously changes the aircraft's direction.
Which controls make an aircraft turn?
Ailerons roll the aircraft into and out of bank, rudder coordinates yaw, and elevator provides the extra lift needed to maintain altitude.
- Enter the bank: move the ailerons in the desired direction and apply the required rudder in the same direction to counter adverse yaw.
- Capture the bank angle: reduce the aileron input as the desired bank approaches. A brief opposite input may be needed to stop the roll, after which the ailerons are usually near neutral.
- Maintain the turn: hold the required bank with small corrections, apply elevator back pressure as needed, and monitor altitude and airspeed. Add power if drag causes the speed to decay.
- Roll out: apply opposite aileron with coordinated rudder, then relax the added back pressure as the wings return to level.
A common beginner mistake is holding the aileron throughout the turn. That normally makes the bank keep increasing and can develop into a descending spiral. Once the bank is established, the tilted lift vector keeps the aircraft turning; the ailerons are then used mainly for corrections and the eventual roll-out. Our breakdown of the primary control surfaces explains the separate roll, pitch and yaw effects.
Why does rudder alone not produce a normal turn?
Rudder mainly yaws the nose rather than establishing the bank required for an efficient turn.
Holding rudder alone creates a sideslip or skid and may cause a secondary rolling motion because of wing geometry and unequal airflow. In a normal turn, rudder counters adverse yaw while the ailerons establish bank. Some fly-by-wire and stability systems automate much of this coordination, but light aircraft and many simulator models make it readily apparent.
Why is back pressure needed in a level turn?
Back pressure increases angle of attack and total lift, replacing the vertical lift lost when the lift vector is tilted sideways.
If total lift stayed unchanged after banking, its vertical component would be less than the aircraft's weight and the aircraft would descend. Increasing lift also increases induced drag, so power may be needed to prevent airspeed loss. Too much back pressure can produce an accelerated stall.
| Bank angle | Level-turn load factor | Approximate stall-speed multiplier |
|---|---|---|
| 0° | 1.00g | 1.00 |
| 30° | 1.15g | 1.07 |
| 45° | 1.41g | 1.19 |
| 60° | 2.00g | 1.41 |
These figures apply to a coordinated, constant-altitude turn. The wing still stalls at its critical angle of attack, but the indicated stall speed rises because the wing is carrying a higher load. A banked aircraft that is allowed to descend without added loading does not automatically experience the same increase.
What makes an aircraft turn coordinated?
A turn is coordinated when bank and yaw are balanced so the aircraft is neither slipping towards the inside nor skidding towards the outside.
The slip/skid indicator should remain centred. If the ball moves off centre, gentle rudder pressure towards the ball normally restores balance—the familiar instruction to “step on the ball”. Avoid chasing it with large, abrupt pedal movements.
For practical control advice, see our guide to using rudder and the slip/skid indicator in a simulator. We also cover the complete simulator procedure for entering, holding and leaving a coordinated turn.
How do bank angle and airspeed affect the turn?
At the same airspeed, a steeper bank produces a faster turn and a smaller radius; at the same bank angle, greater airspeed produces a slower turn rate and a larger radius.
For a coordinated level turn in still air, the relationships are approximately turn radius = V² / (g × tan bank) and turn rate = g × tan bank / V, where V is true airspeed. This is why a fast aircraft needs substantially more room to turn unless it also increases bank angle and load factor.
Wind does not change the aircraft's turn rate relative to the surrounding air when bank angle and true airspeed remain constant. It does change the path over the ground, so a constant-bank turn may appear stretched or displaced on a map.