Patent GB-208792-A (GB)
Title: Improvements in aeroplanes
IPC: B64C23/00
Filed: 1922-09-27
Abstract: 208,792. Nonaka, S. Sept. 27, 1922. Planes, construction of; stopping way; steering. -The wing of an aeroplane has the rear part of the upper surface cut away and is traversed by rectangular air passages 6 having slots 7 which together with slots 1 in the under surface of the wing tend to reduce the air pressure above the under surface. Flaps 9, 30 on the upper and lower surfaces are adapted to be set at right angles to the direction of flight to check the speed of the machine, and simultaneously with this adjustment a divided rudder and a divided elevator are spread out to increase the resistance to forward motion. The flaps 9 are hinged at their rear edges and are normally held in their closed positions against spring buffers 22 by the engagement with eyes 11 of hooks on rotatable collars 19<1> which are provided with external handles 18. The collars 19<1> have also arms 17 connected to cords 20 by pulling which the collars 19<1> are rotated to release the hooks, whereupon the flaps are given an upward impulse by the buffers and are then carried by air pressure to the position shown in Fig. 2, where they are held against further backward movement by cords 16 anchored at 15. The ends 15 of the cords 16 are secured by sliding bolts which can be withdrawn by the pilot to allow the flaps 9 to assume the position shown in dotted lines. To augment the action of the flaps 9, flaps 30 are pivoted within apertures in the lower surface by means of hinges which laterally overlap the joints to prevent leakage. The front edges 31 of the flaps are raised by cords 35, and simultaneously cords 33 act, against springs 37, upon levers 36 on pivoted sections 8 of the passages 6 so as to deflect air currents into branch passages 6<1>. These air currents impinge on hinged plates 39 which are connected by cords 34 to the top edges 31 of the flaps 30 to assist in opening them. The forward edges of the flaps 30 are cut away to clear the passages 6. The sections 8 have pockets formed in their under rear surfaces to cause a depression tending to restore the flaps to their normal position when the cords 33 are released. The front 107 of the wing may be flat and horizontal instead of curved. The elevator comprises upper and lower planes 41, 43, Fig. 11. adapted to be opened out to a position at right angles to the line of flight, a frame 42, against which the planes normally rest, being operated by the usual control lever. A rudder is provided of similar construction but adapted to have its two planes opened out until they are each at 45‹ to the line of flight. Fig. 17 shows two control levers 51, 51' mounted on opposite sides of the fuselage, each lever being of the form shown in Fig. 15. A wire 55 extends from the lever 51 to the upper plane 41 of the elevator which can be raised by pushing the lever. A cord 63 extends from the lever 51<1> to the lower plane 43 of the elevator, and is secured to the end of a lever 57 pivoted at 64. A cord 58 connects the same end of the lever to the cord 55, and the opposite end of the lever is connected to a cord 61 passing over a pulley 109 and connected to the right and left planes of the rudder. The lever 51' is also connected by a cord 21 to the cords 20, 35, Fig. 2. A push on the lever 51<1> will consequently raise the flaps 9, 30 and simultaneously open out both the elevator and rudder planes. The elevator and rudder surfaces are slotted to permit the passage of the control wires of the central frames of the elevator and rudder.