978,574. Boundary layer control. GENERAL ELECTRIC CO. April 18, 1962 [April 20, 1961], No. 15034/62. Heading F2R, [Also in Division B7] An aircraft has gas generating means 16 connected by ducts 17 to a tip turbine powered fan 14 supported on the aircraft with its axis of rotation parallel with the longitudinal centre line of the aircraft, a valve 22 in each duct 17 selectively directs exhaust gas to fan 14 or to a forwardly directed nozzle 23 for reverse thrust. The nozzles 23 are retractable and the inlet 20 for the fan 14 extends around the upper part of the fuselage 10 and ingests boundary layer air. Louvres 19 in nozzle 18 assist pitch control and provide a vertical component of thrust when required. Fans 12 and connected power plants in the wings give vertical lift. In Fig. 3, not shown, two fans 14 are carried externally of the fuselage and in Figs. 4 and 5, not shown, a gas generator and a fan 14 are carried by each wing.
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