GB223292A - Improvements in the method of and means for controlling aeroplanes - Google Patents

Abstract

223,292. Page, r. H., and Page, Ltd., H. July 16, 1923. Balancing.-In an aeroplane of the type in which a transverse slot is provided in each wing to increase the lift by reducing burbling when flying at large angles of incidence, the lateral balancing effect produced by operation of the ailerons is increased by providing a connection from each aileron to means for disturbing the flow of air adjacent to or through the slot in the corresponding wing so that such means become effective to reduce the lift on the higher side of the machine when the ailerons are operated. In one arrangement, Fig. 3, the slot between the main wing 1 and a pivoted auxiliary wing 2 is closed against the action of a spring 2<a >upon upward movement of the aileron 3 from its normal position to the position shown, a lost motion connection being provided between the aileron and' the connecting rod 4 to prevent any operation of the wing 2 upon downward movement of the aileron from its normal position. Independent control mechanism, not shown, is provided for closing the slots in the two wings simultaneously. In a modified arrangement, Fig. 6, upward movement of the aileron to the position shown raises the wing 2 against the action of a spring 2<a> into position to disturb the air flow above the slot. The slots in the two wings may be closed simultaneously by the springs 2<a> by simultaneous lowering of stops 2<c>, and, to enable the ailerons to be moved freely when the slots are thus closed, each rod 4 may be lengthened by operating the pulley 4<b> of a right and left-handed screw adjustment 4<a>. In the arrangement shown in Fig. 7, the rod 4 is pivoted to the aileron 3 and to the wing 2, and the points of connection of the rod are so arranged in relation to the pivotal axes of the aileron and the wing that much greater movements are imparted to the wing during the movements of the aileron above the normal position, than during its movements below the normal position. In this case the wings 2 are operated to open or close the two slots simultaneously by operating simultaneously the pulleys 4<b> to lengthen or shorten the two rods 4. The flow of air through or adjacent to the slots may be disturbed by flaps pivoted to the auxiliary wings 2 or to the main wings 1 about transverse horizontal axes, e.g. as shown at 8, Fig. 11, or about longitudinal horizontal axes as shown at 11, Figs. 15 and 16, or about vertical axes as shown in plan at 13, Fig. 18. Fig. 22 shows an arrangement for operating a flap 9 from the aileron 3 without a lost motion connection, the lower movements of the flap being within a recess in the main wing 1. Specifications 157,567, 172,109, and 176,909 are referred' to.