Improvements in or relating to propulsion means for vehicles for movement on land, water or in the air

摘要

916,667. Propelling vehicles. FORSCHUNGSZENTRUM DER LUFTFAHRTINDUSTRIE. July 25, 1959, No. 25598/59. Class 79(3). [Also in Group XXXIII] A vehicle is propelled by generating a stream of flowing medium, which is deflected by flow diverting means consecutively on to different sides, including two opposite sides, of a body extending in the direction of propulsion. In Fig. 1, a stream of moving fluid 1 generated by an air screw or water screw 2 is directed over a flap 4 oscillated about an axis 3, so that the stream is deflected to impinge alternately on to the opposite faces of a streamlined body 5. This is stated to allow a reduction in the difference between the velocity of the generated stream and the velocity of the surrounding medium, both relatively to the vehicle, resulting in improved thrust and less noise generation. The flap 4 is driven from a shaft 7 through suitable gearing 8 and an electromagnetic slipping clutch 10 controlled by a potentiometer 11. In Fig. 2 the fluid stream passes through a hollow twin shelled body 12, the part of the flow within the annular space 15 being cyclically controlled by revolving shutters 19, 20, to issue alternately through inwardly directed slot nozzles 17, 18 and thus deflect the main flow through the body in alternate directions. Valves 21 control the flow through space 15, and the speed of revolution of the shutters 19, 20 is controlled by gearing 22. In a further embodiment, the flow is divided wholly between two nozzles, each directing the flow on to one face of body 5, and the nozzles are closed cyclically. There may be more than two nozzle, the body 5 then being pear shaped. In another embodiment, the fluid stream is electrically charged or inoculated with charged particles and deflected by an alternating electric or magnetic field. In, Fig. 6, the tail pipe 32 of a jet propulsion engine contains a deflecting element comprising a bullet 33 and eccentric portion 34, which are rotated by a furbine shaft 27 through epicyclic gearing 39. A similar rotating deflector may be used in a slipstream casing downstream of a propeller. The deflector is movable axially for control purposes by a linkage 38. The tail pipe may be surrounded by a duct 35 also conveying the fluid stream. The pipe 32 and deflector 34 may then rotate together. The tail pipe may have an eccentric nozzle instead of the deflector and be rotated. The downstream ends of pipes 32 and 35 may comprise displaceable overlapping plates for varying the outlet areas. The body 5 may comprise members 44, 45 which are adjustable to deflect the fluid flow.