GB485794A - Improvements in or relating to aircraft - Google Patents

Abstract

485,794. Controlling aircraft. BACK, W. E. March 4, 1937, No. 6479. [Class 4] In an aircraft comprising a main plane with two ailerons hinged thereto and a tail elevator, or two main planes without appreciable stagger of which either or both are provided with two hinged ailerons, a pivoted main control member is adapted to move the ailerons differentially and when moved in the fore and aft direction about its pivot to move the ailerons together and simultaneously to impart movement in the opposite sense to the elevator, a separate control being provided whereby the pivot of the main control may be moved to move the ailerons together in the same sense without causing appreciable movement of the tail elevator. When the main planes are considerably staggered only the ailerons of the forward plane are moved oppositely to the elevator and those of the after plane are moved in the same sense. In the last form a wheel control comprises a wheel 9 carried by a column 10 fast with a transverse spindle 19 mounted for vertical rocking movement by crank arms 45, 46 on a shaft 43 rotatable by hand lever 42. Wheel 9 is geared to a sleeve 13 surrounding column 10 and carrying at its lower end a pinion 14 meshing with similar pinions 15, 16 on sleeves 17, 18 carried by spindle 19. Two-armed levers 20, 29 carried by sleeves 17, 18 respectively are connected by the linkage shown to levers 23, 24 and 32, 33 fast with pulleys 25, 26 and 34, 35 respectively. Pulley 25 is connected to port upper aileron 6, pulley 34 to the starboard upper aileron, pulley 26 to starboard lower aileron and pulley 35 to port lower aileron 7. Spindle 19 also carries levers 38, 39 respectively connected bv links to a tail elevator. Thus fore and aft movement of the wheel causes both elevator and aileron movement, the movements of the elevator being opposite to those of the upper ailerons and similar to those of the lower ailerons. Rotation of the wheel causes differential movement between port and starboard ailerons. Rotation of shaft 43 by hand lever 42 causes simultaneous movement in the same sense of all the ailerons, the elevator remaining unaffected. In a modification, Fig. 3, a control column is universally movable on a ball 46 movable up and down by hand lever 47, the column being fast with a fore- and aft shaft carrying double-armed levers connected by links to levers associated with pulleys around which pass cables operating the control surfaces as in the above-described arrangement. Specification 462,382 is referred to.