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Crab angle

Aviation CrabCrash

The crab angle approach. Upon reaching the runway threshold, apply wing down
and opposite rudder to keep the airplane aligned with the centerline.

 


If the go-around does not adequately compensate for winds by using a crab angle for the heading the pilot may experience directional control problems. The wing low and opposite rudder is used on final to keep the nose straight with the runway.

However, landing gears (e.g. those of commercial airliners) are designed to withstand enormous side forces so that if the plane touches down with a significant crab angle, it won't necessarily be damaged.

The nose of the aircraft may be pointing due west, for example, but a strong northerly wind will change its track south of west. The angle between heading and track is known as the drift angle or crab angle.

crab angle: See crosswind correction, 16.8
crabbing along a road, 16.8
critical angle of attack, 5.3.2
critical angle of attack: definition, 5.3.1
critical engine, 17.1.12
critical engine: definition, 17.1.12
cross radials, 14.4.3, 14.7.4 ...

See also: Aviation, Force, Flight, Speed, Navigation