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An aircraft wing leading arrangement includes a forward slat (10) movable between a stowed position and a deployed position in which a slot (13) is revealed. To prevent undesirable flow disturbances in the slot (13), a shutter device is provided for the aperture (22) in the leading edge through whic

An aircraft wing leading arrangement includes a forward slat (10) movable between a stowed position and a deployed position in which a slot (13) is revealed. To prevent undesirable flow disturbances in the slot (13), a shutter device is provided for the aperture (22) in the leading edge through which the slat actuator mechanism (14) protrudes in the deployed position. This shutter device consists of a sprung (38) panel (30) of flexible material pivotally movable between aperture-blocking and aperture-unblocking positions.

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A wing leading edge arrangement for aircraft in which a slat is provided forwardly of a fixed leading edge and movable between a retracted configuration in which it lies closely adjacent the fixed leading edge and a deployed configuration in which it is spaced from the fixed leading edge to define a

A wing leading edge arrangement for aircraft in which a slat is provided forwardly of a fixed leading edge and movable between a retracted configuration in which it lies closely adjacent the fixed leading edge and a deployed configuration in which it is spaced from the fixed leading edge to define a slot, said slot including: attachment means to two or more substantially chordwise support tracks slidably mounted upon said leading edge to define said slat movement; an aperture in the leading edge skin of said fixed leading edge to accommodate said slat attachment means when said slat is in its retracted configuration; aperture closing means mounted within said fixed leading edge and movable between an aperture closing position when the slat is in its deployed configuration and a retracted position when the slat is in its stowed configuration; characterised in that said aperture closing means comprises: a) a closing panel of a flexibly foldable material having a surface area of a size to close off said apertures; b) mounting means for locating said closing panel within said fixed leading edge adjacent said apertures; and c) actuating means effective to displace said closing panel between a retracted configuration within said fixed leading edge in which said panel is slackly folded on itself and a fully deployed position in which said closing panel is maintained in an unfolded condition in which it substantially and sealingly conforms to the profile of the leading edge profile over at least the area of said aperture.