| 摘要 |
1,144,231. Variable sweep-back aircraft wings. BRITISH AIRCRAFT CORP. (OPERATING) Ltd. 3 July, 1967 [7 July, 1966], No. 30625/66. Headings B7G and B7W. An aircraft has wings 10 whose sweepback can be varied, the trailing edges of the wings entering into slots 12 in the sides of the fuselage. Each slot 12 is provided with a seal 13, 14 comprising a number of wedge-shaped inflatable bags 17, 171 mounted with their apexes towards the interior of the fuselage, so that with the wings in the position of minimum sweep-back, the bags fill the slot and their external surfaces conform with the fuselage contour, the bags being yieldable resiliently to admit the trailing edge of the wing when the sweep-back is increased. Further wedge-shaped bags (21, 22), Fig. 2 (not shown), may be mounted with their apexes outwards between the bags 17, 171 and the neighbouring walls 19, 20 respectively of the slot 12. The exposed surfaces of each of the bags 17, 171 may be covered with a stretched skin 31, 32 to give a relatively smooth surface. Between the bags 17 and the wall 19 there may be a frame 27 pivoted at 271 to the wall and held against the bags 17 by further wedgeshaped inflatable bags (28, 29), Fig. 6 (not shown), at one end of the frame. The pressure in the bags 17, 171, and possibly (21, 22, 28, 29) when these are fitted, may be controlled by either a connecting pipe, or a constant pressure supply system which includes relief valves 42 venting to atmosphere, a source 41 of compressed air, a non-return valve 40, and pressure reducing valves 43. |
