Abstract The invention relates to a leading-edge slat actuating system comprising an intermediate slat having a trailing edge and hingedly connected to a beam fast with the main wing, a front slat hingedly connected to the beam and a leading edge hingedly connected to the front slat, characterized in that the system includes: a first jack having one end hingedly connected to a non-moving point on the wing structure and its other end hingedly connected to a moving point fast with the front slat; two rods on either side of the jack, having their hinge-points located on the one hand on the leading edge of the front slat, in an outer part of the undersurface thereof, and at non-moving points on the beam on the other; a second jack having one end hingedly connected to a non-moving point on the wing structure and its other end hingedly connected to a point moving with the trailing edge of the intermediate slat, the jacks and rods being so arranged that when the jacks are in their extended position the slats are extended to form two slits one of which lies between the intermediate slat and the wing and the other between the front slat and the intermediate slat.
A wing leading-edge slat actuating system comprising a beam fast with the wing, an intermediate slat having a trailing edge and hinged to said beam, a front slat hinged to said beam, and a leading edge hinged to said front slat, characterized in that said system includes a first jack having one end hingedly connected to a fixed point on the wing and a second end hingedly connected to a moving point fast with said front slat and placed substantially at middle distance on a line drawn from a hinge point common to said front slat and said leading edge and reaching a trailing edge of said front slat; two rectilinear rods on either side of said jack having their hinge-points respectively located, on the one hand, at points fast with said leading edge which is fair shaped and on an outer part of the undersurface thereof, and at fixed points on said beam on the other; a second jack having a fixed hinge-point on the wing and a moving hinge-point on said intermediate-slat trailing edge; said jacks and rods being so arranged that when said jacks are in their extended position said slats are extended and form two slits, one of said slits between said intermediate slat and said wing and the other slit between said front slat and said intermediate slat, it being possible for said slits to be masked for certain flight configurations such that when said jacks are in their retracted position said slats have been retracted by pivotal motion and blend completely with the leading-edge profile.
Claim 2
Dependent Claim
261 words
A wing leading-edge slat actuating system comprising a beam fast with the wing, an intermediate slat having a trailing edge and hinged to said beam, a front slat hinged to said beam, and a leading edge hinged to said front slat, characterized in that said system includes a first jack having one end hingedly connected to a fixed point on the wing and a second end hingedly connected to a moving point fast with said front slat and placed substantially at middle distance on a line drawn from a hinge point common to said front slat and said leading edge and reaching a trailing edge of said front slat; two rectilinear rods on either side of said jack having their hinge-points respectively located, on the one hand, at points fast with said leading edge which is fair shaped and on an outer part of the undersurface thereof, and at fixed points on said beam on the other; a second jack having a fixed hinge-point on the wing and a moving hinge-point on said intermediate-slat trailing edge; said jacks and rods being so arranged that when said jacks are in their extended position said slats are extended and form two slits, one of said slits between said intermediate slat and said wing and the other slit between said front slat and said intermediate slat, it being possible for said slits to be masked for certain flight configurations such that when said jacks are in their retracted position said slats have been retracted by pivotal motion and blend completely with the leading-edge profile.
Claim 3
Dependent Claim
43 words
A wing slat actuating system in accordance with claim 1 further characterized by said jacks being screw-jacks of the ball and helical tract type, and intermediate gearboxes pivotally connected to the aircraft wing, and drive shafts for driving said jacks through said gearboxes.