GB271460A - Improvements in control mechanism for the rudders, elevators, ailerons and the like,of aircraft - Google Patents

Abstract

271,460. Rohrbach Metall-Flugzeugbau Ges. May 20, 1926, [Convention date]. Steering and balancing.-The pilots control gear for aircraft rudders, elevators, and ailerons comprises a control column 1 rigidly connected to a shaft 4 having offset arms 5 mounted on pivots 6, 6<1>. A lever 7 having its free end in the axis of the pivots 6, 6<1> is mounted on an axle in the lower part of the column, this axle having arms connected by links 8 to similar arms on a toothed quadrant geared to a pinion on the shaft of a hand wheel 10. Two levers 2, 2<1> with adjustable footrests 20 are mounted respectively on a shaft 17 and sleeve 18, the shaft and sleeve also carrying levers 16, 16<1> connected by links to arms on a shaft 21 mounted beneath the pivots 6, 6<1>. The sleeve 18 is connected by a yoke 19 to a sleeve 19<2> near the righthand bearing of the shaft 17. The shaft 21 has an arm 22 for actuating the rudder, the arm 7 is connected by a link 12 to a double-armed lever 14 for controlling the ailerons, and an arm 11 on the pivot 6<1> controls the elevator. The frame on which the controls are mounted forms a detachable unit. The same frame may also accommodate a second set of gear for dual control. When dual control is required the arm 5 and bearing 6<2> at the centre of the frame are transferred to the right of the frame extension and a shaft 4<1> carrying a lever 1<1> is connected by a flange coupling to the shaft 4. The bearing for the shaft 17 is similarly transferred and a shaft 17<1> and sleeve 19<1> carrying foot levers are clutched by movable dog clutches respectively to the shaft 17 and sleeve 19<2>. A lever 7' on the control lever 1<1> is linked to the lever 14, which in this case is connected by a link 15 to an aileron control lever at the side of the frame. A modification is described in which the duplicate controls are arranged one in front of the other, the second set of controls being disconnectible from the transmission by simultaneously actuated dog clutches. The duplicate set of controls may be carried on a separate frame. Fig. 10 shows a modification in which the lever is pivoted to a longitudinal shaft 29 which has an arm 30 for actuating the ailerons, the elevator being actuated by a rod connected to the lever. A rocking lever 32 actuates the rudder through rods 33. A second set of controls may be mounted behind these as shown, the shaft 29 of the rear control being connected to an extension of the forward shaft by a clutch 35, and the rear rocking lever 32<1> being connected by a similar clutch to a lever connected to the rods 33. These two clutches are operated from a common lever. The second control lever can be separately coupled to or uncoupled from the elevator control.