If you have ever looked out the window during a storm and realized the runway was visible from your side window rather than the front cockpit, you have experienced a crosswind landing. Seeing a massive commercial jet fly sideways toward the ground is one of the most alarming sights in aviation.
Yet, despite how terrifying it looks from the cabin, landing in high winds is a standard, highly practiced pilot skill. Let's demystify the aerodynamics of the crosswind landing and explain the techniques pilots use to keep the aircraft perfectly on track.
The Crosswind Problem
Runways are built aligned with prevailing local wind directions because aircraft perform best taking off and landing straight into the wind. However, weather is unpredictable. When wind blows at an angle relative to the runway, it creates a crosswind component.
If a pilot flew straight down the runway centerline with a crosswind blowing from the left, the aircraft would drift off the tarmac to the right. To combat this, pilots must choose one of two distinct techniques: the Crab Method or the Wing-Low (Slip) Method.
1. The Crab Method: Flying Sideways
The crab method is the primary technique used by heavy commercial airlines. As the plane approaches, the pilot points the nose of the aircraft slightly into the wind (e.g., to the left if the wind is from the left).
This creates an angle between the aircraft’s nose and the runway direction, called the crab angle. The aircraft moves sideways over the ground but tracks perfectly straight along the runway centerline.
Just seconds before the tires touch down, the pilot applies rudder pressure in the opposite direction (a process called "de-crabbing" or "kicking it straight") to align the landing gear with the runway direction. This prevents severe lateral stress on the tires and landing gear structures.
In heavy widebody planes like the Boeing 747 or 777, the landing gear is designed to withstand landing while slightly crabbed. However, in smaller aircraft, touching down without de-crabbing can cause the tires to blow or force the plane to veer violently off the side of the runway.
2. The Wing-Low (Slip) Method
The wing-low method is commonly used in smaller private aircraft or as a final adjustment in commercial planes.
Instead of crabbing, the pilot banks the wings slightly into the wind (lowering the upwind wing) and applies opposite rudder to keep the plane’s nose pointing straight down the runway.
This creates a slip, which counteracts the drift. When landing with this technique, the upwind wheel (e.g., the left main wheel) will touch down first, followed by the downwind wheel, and finally the nose wheel. It feels like the plane is leaning into the wind.
Comparing Techniques: Crab vs. Slip
The Crab Method
- Wings remain level during the descent, keeping passengers comfortable.
- Saves engine thrust and fuel by flying a clean aerodynamic shape.
- Requires a highly coordinated "de-crab" kick just before touchdown.
- Used predominantly on widebody jets (B777, A350, A380).
The Wing-Low Method
- Aircraft nose remains aligned with the runway throughout the final approach.
- The wing must be banked, which can feel alarming to passengers.
- The upwind main landing gear touches down first.
- Used on narrowbodies and smaller general aviation aircraft.
Crosswind Limits and Go-Arounds
Every aircraft type has a maximum demonstrated crosswind limit. For example, a Boeing 737 is certified to land in dry crosswinds of up to 33 to 36 knots. If the crosswind exceeds these limits, or if wind gusts become too turbulent for a stable approach, pilots will execute a "go-around."
A go-around involves climbing back into the sky, flying a pattern around the airport, and either trying again once the wind dies down or diverting to another airport. It is a normal safety procedure and demonstrates excellent pilot judgment.
Pilot Perspective
Next time you watch a plane land sideways, know that the pilot is in complete control. They are actively balancing aerodynamic slip, wind velocity, and runway alignment to ensure a safe touchdown.
Log Your High-Wind Landings
Have you recently landed during a heavy storm or experienced a go-around? Help compile crosswind occurrence and passenger comfort rates by rating your landing.