Patent GB-756035-A (GB)
Title: Improvements in jet deflecting devices for nozzles of jet propulsion units
Inventor: MARCHAL RAYMOND HIPPOLYTE
IPC: F02K1/32
Filed: 1953-02-03
Abstract: 756,035. Jet propulsion nozzles. SOC NATIONALE D'ETUDE ET DE CONSTRUCTION DE MOTEURS D'AVIATION. Feb. 3, 1953 [Feb. 16, 1952], No. 3072/53. Addition to 750,623. Class 110(3) [Also in Group XXXIII] A device for deflecting the gases issuing from the propulsion nozzle of a jet propulsion unit comprises a set of concealable guide vanes which when operative define passages extending laterally of the axially-flowing jet stream, means being provided for concealing or displaying the vanes. Controllable means are also provided for urging the jet stream towards and into the lateral passages, the set of vanes being positioned, at least when displayed, downstream of the nozzle outlet. In Fig. 1, the outlet end of the nozzle is rectangular and a tube d of aerofoil section is -horizontally disposed across the nozzle. Shafts 7 and 8 are mounted horizontally in bearings in the plane of the nozzle outlet and each carries rods 7a, 8a on which sets of vanes 5, 6 are mounted. The sets of vanes are shown in the operative position in full lines:and in the concealed position in chain-dotted lines, the positions of the vanes being varied by means of the piston 19 acting through a rack 18 and pinions 14, 15, 16, 17. Compressed air is supplied to the tube d and issues through nozzles f1, f2 and causes the gas stream to be deflected and to pass between the deflector vanes 5, 6. When the vanes are in the inoperative position, they are covered by fairings s so as to cause no restriction to air flow. In Fig. 3 the outlet of the nozzle is circular and the member d is bullet-shaped with an annular orifice f. The deflector vanes 5 are annular and are mounted on screw-threaded rods 21 and the vanes may be withdrawn into the inoperative position shown in chain-dotted lines, within the fairing s by rotation of the nuts 22 by means of the toothed ring 24. In Fig. 5, the deflector vanes 26 nearest the outlet of the propulsion nozzle are fixed, only the vanes 5 remote therefrom being movable. In Fig. 6, the nozzle outlet is rectangular and the deflector vanes 5, 6 are mounted on rods 30, 31 which are pivotally mounted on rods 36, 37, 38, 39, the vanes being moved into either the operative or inoperative positions by means of the piston 45 acting through the rods 44, 42, 43. In Fig. 8, the vanes are of annular form and are fixed in the position, and a sleeve 51 is slidable mounted within the vanes so that in the position shown in full lines, the vanes are inoperative, but in the position shown in chain-dotted lines, the vanes are operative. An external sleeve 51a also moves with the inner sleeve 51. In Fig. 9, the propulsion nozzle outlet is rectangular and the vanes 5. 6 are pivotally mounted on the fixed arms 59, 60 their outer ends being pivotally connected to the rods 63, 64 which are movable by means of the piston 73 acting through linkwork. The operative positions of the vanes are shown in full lines, and the inoperative positions in chaindotted lines. Specifications 691,302 and 691,948 [Group XXXIII] are referred to.