| 摘要 |
965,748. Aircraft. HOVERCRAFT DEVELOPMENT Ltd. Oct. 5, 1960 [Oct. 20, 1959], No. 35593/59. Headings B7G and B7W. An aerofoil member has at least one surface provided with at least one supply port extending adjacent to and substantially parallel to the periphery of said surface, including means for supplying a gas to the supply port to issue therefrom and form a curtain of moving gas which, in operation, with the surface of the aerofoil bounds a space in contact with the surface whereby a cushion of pressurised gas is formed in said space on movement of the aerofoil member through the air. An aircraft 1 has wings 2 each provided with a peripherally extending supply port 3. Gas turbine engines 4 discharge air into ducts 5 which communicate with supply ports 3 to form curtains 11, which as a result of forward motion of the wing, are swept aft, as shown in Fig. 3, to form wedgeshape cushions of pressure gas which form an effective part of the aerofoil profile to influence lift. To increase stability of the aircraft, a further curtain 12 is supplied from a duct 14. In the embodiment of Fig. 6 a vertical stabilizer 25, e.g. a rudder, is formed on each surface with a peripheral supply port 29 each connected to a supply duct 30 through respective intermediate ducts 31, 32, provided with flap valves 33, 34. In operation, when rudder action is required, one or other of the flaps 33, 34 is opened by linkage 35 or 36 to cause gas to issue from the peripheral slots to form an appropriate wedge-shape cushion of pressure gas on the appropriate side of the stabilizer, to produce a rudder effect. An installation for a deltawing aircraft is described. Specification 894,644 is referred to.
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