The jet engine, in particular for vertical take-off and landing aircraft, with a rotatable primary nozzle and additional air secondary nozzle or

摘要

1,198,933. Deflecting propulsive jets. MESSERSCHMITT-BOLKOW BLOHM G.m.b.H. 19 April, 1968 [28 April, 1967], No. 18597/68. Heading B7G. Jet propulsion plant for a VTOL or STOL aircraft comprises an engine 111 with a nozzle 112 capable of downward deflection to provide jet lift, the engine being housed within a pod or nacelle having an aft section 120 in way of nozzle 112 capable of axial rotation about an axis substantially parallel to the engine axis. In the preferred embodiment there are two engines in nacelles arranged side-by-side and each section 120 has a lengthwise opening 121 which, when the section is rotated to bring the opening to the position shown in Fig. 4, enables the deflector jet nozzle 112 to extend downwardly through the opening. When the nozzle is not deflected the section 120 is rotated through 90 degrees so that the opening 121 is in transverse alignment with a member 144 formed with faces 145 which, when the member 144 is moved bodily laterally, engage with mating edge faces 122 on section 120 at the sides of opening 121. Apparatus e.g. a jack and linkwork for moving the members 144 in unison is operated directly with a motor (not shown) for rotating section 120. The section 120 is extended by a secondary nozzle 120a formed with apertures 123 through which atmospheric air is induced to be ejected through the secondary nozzle 113a.