Aircraft wing and flap arrangement

A wing and flap arrangement including a fixed wing portion, a flap member extending rearwardly of the fixed wing portion, a variable camber upper surface member in the form of a cantilevered leaf spring, said upper surface member being anchored to said fixed wing portion such that it trails therefrom and is biassed toward said flap member at all times, a pivot pivoting said flap member to said fixed wing portion about a generally spanwise axis, actuation means adapted to effect deflection of said flap member about its pivot, and upper surface urging means for urging said upper surface member from said flap member against the bias of the leaf spring when a slot is required, said upper surface urging means including a cam track and cam track engaging member, one of which is carried by said upper surface member and the other is carried by said flap member and arranged so that on relatively small upward and downward deflection from a neutral position, said upper surface member and the upper surfaces of said fixed wing portion and said flap member together define a substantially continuous surface, whilst on relatively large downward deflection from the neutral position said cam track and cam track engaging member co-operate to urge said upper surface member from said flap member.