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During takeoff and landing, the flaps on the back of the wing extend downward from the trailing edge effectively altering the shape of the wing. This change enables it to divert more air generating more lift. This change also increases drag, which helps a landing airplane slow down while requiring more thrust during takeoff.
With regards to wind, the direction is an important factor. With wind blowing down the runway, there is not too much of an effect â except a bumpy take-off and landing. If the wind is blowing ACROSS the runway (known as a crosswind), flights can be delayed or even cancelled. Each aircraft type has a âcrosswind limitâ â which is the strength of wind the plane is certified to land in. If the wind speed exceeds this limit, the flight will not take-off or land. Further to this, airlines and airports will have their own limits which may be more strict than is required by aviation authorities. The important fact is this; No aircraft will land or take-off in wind that is too strong. Remember the âjust in caseâ principle. An aircraft may be able to land in 30mph cross winds, but the airlines may impose a limit of 20mph (windspeed figures Iâve used are just for example purposes).