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The following guidelines are advised by Boeing for a crosswind landing. These guidelines assume steady wind (no gusting). These winds are measured at 10 metres (33 ft) tower height for a runway 45 metres (148 ft) in width. Basically, there are three landing techniques which may be used to correct for cross winds: de-crab, crab, and sideslip.
A flight path parallel to and in the direction of the landing runway. It is offset from the runway and opposite the downwind leg. Crosswind leg. A short climbing flight path at right angles to the departure end of the runway. Downwind leg. A long level flight path parallel to but in the opposite direction of the landing runway.
The risk for wingstrike primarily depends on the angle of the line between the tip of the wing and the landing gear. The position of the landing gear, when calculating that line, should be at the point that it is maximally compressed, for example if the aircraft comes down off center and with its weight entirely on the downwind gear.
The sideslip method for crosswind landings is not suitable for long-winged and low-sitting aircraft such as gliders, where instead a crab angle (heading into the wind) is maintained until a moment before touchdown. Aircraft manufacturer Airbus recommends sideslip approach only in low crosswind conditions. [7]
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For example, a 10 knot wind coming at 45 degrees from either side will have a crosswind component of 10 knots × sin(45°) and a head/tailwind component of 10 knots × cos(45°), both equals to 7.07 knots. Pilots can use a use a crosswind component chart to calculate the headwind component and the crosswind component.
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