8.crosswind-landing. Crosswind Landing
A crosswind landing is required whenever the wind is not aligned with the runway centerline. Because most runways cannot be perfectly aligned with the prevailing wind, the ability to land safely in a crosswind is one of the fundamental skills a student pilot must master. The two accepted methods are the sideslip (wing-low) method, the crab method, or a combination of the two. The Airplane Flying Handbook recommends the wing-low method, or a crab transitioned to a sideslip in the flare, because at touchdown the longitudinal axis must be aligned with the direction of travel down the runway to avoid side-loading the landing gear.
Crosswind components and limits. Every airplane has a maximum demonstrated crosswind component published in the POH. This is not a regulatory limit but the highest crosswind the manufacturer's test pilot demonstrated during certification. Pilots determine the actual crosswind component using a crosswind component chart, or the simple approximation:
- 30° off runway heading ≈ 50% of wind speed
- 45° off runway heading ≈ 70% of wind speed
- 60° off runway heading ≈ 87% of wind speed
- 90° off runway heading = 100% of wind speed
For example, a wind of 20 knots at 30° off the runway gives a crosswind component of about 10 knots.
The crab method. On final approach, the pilot establishes a wind correction angle (crab) into the wind so the airplane tracks the extended runway centerline with wings level. The crab is held until just before touchdown, at which point the pilot must use rudder to align the longitudinal axis with the runway and simultaneously lower the upwind wing with aileron to prevent drift. Failure to remove the crab before touchdown imposes a severe side load on the gear and can cause the airplane to swerve, skip, or even tip a wingtip into the runway.
The sideslip (wing-low) method. This technique is preferred for the final approach and touchdown phase. The procedure is:
- On final, lower the upwind wing with aileron just enough to stop drift toward the downwind side.
- Apply opposite (downwind) rudder to keep the longitudinal axis aligned with the runway centerline.
- Hold these cross-controlled inputs into the flare and through touchdown.
- Touch down on the upwind main wheel first, followed by the downwind main, then the nosewheel as elevator back-pressure is relaxed.
- After touchdown, progressively increase aileron deflection into the wind as the airplane decelerates and the controls become less effective. By the end of the rollout, the upwind aileron should be fully deflected.
The sideslip provides direct visual feedback — if drift develops, the pilot increases bank into the wind; if the nose drifts off centerline, rudder corrects it. Bank angle and rudder are adjusted independently and continuously.
Combination method. Many pilots crab on final for passenger comfort and slip-free flight, then transition to a sideslip during the flare. This combination is widely taught and works well in most light airplanes.
Common errors.
- Attempting to hold the airplane on the runway as airspeed decreases without increasing aileron into the wind, allowing the upwind wing to rise.
- Touching down in a crab, side-loading the gear.
- Excessive approach speed, which results in floating and reduced rudder authority during the flare.
- Releasing rudder pressure at touchdown, allowing the nose to swing downwind (weathervaning).
- Using ailerons to steer rather than to keep the wings level relative to the wind during rollout.
Gusty conditions. When winds are gusty, the AFH recommends adding half the gust factor to the normal approach speed. For example, with winds reported 15 gusting 25 (gust factor 10), add 5 knots to the normal approach speed. This provides extra control authority during gusts but requires increased landing distance.
After touchdown. Crosswind control does not end at touchdown — it begins. The airplane is still flying as long as it has airspeed. Hold the upwind aileron into the wind, use rudder for directional control, keep the nosewheel firmly planted with forward elevator after it is on the ground (in nosewheel airplanes), and apply brakes evenly. In a tailwheel airplane, the upwind aileron is even more critical, and the tailwheel should be kept on the ground for steering authority.
Go-around decision. If the crosswind exceeds personal or aircraft limits, if drift cannot be controlled, or if the airplane is not aligned with the centerline approaching the flare, the correct action is to execute a go-around. There is no penalty for an early go-around — only for pressing on with an unstabilized approach.